Solvothermal synthesis and crystal structures of two new cadmium coordination polymers containing polynitrile ligands

Setifi, F.; Setifi, Z.; Al-Douh, M.H.; Merabet, L.; Kaboub, L.; Glidewell, C.

doi:10.1107/S2056989022010672

research communications

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 78| Part 12| December 2022| Pages 1238-1243

https://doi.org/10.1107/S2056989022010672

Open

access

Solvothermal synthesis and crystal structures of two new cadmium coordination polymers containing polynitrile ligands

Fatima Setifi,^a ^* Zouaoui Setifi,^b,^a Mohammed Hadi Al-Douh,^c ^* Layachi Merabet,^a Lakhmissi Kaboub ^a and Christopher Glidewell ^d

^aLaboratoire de Chimie, Ingénierie Moléculaire et Nanostructures (LCIMN), Université Ferhat Abbas Sétif 1, Sétif 19000, Algeria, ^bDépartement de Technologie, Faculté de Technologie, Université 20 Août 1955-Skikda, BP 26, Route d'El-Hadaiek, Skikda 21000, Algeria, ^cChemistry Department, Faculty of Science, Hadhramout University, Mukalla, Hadhramout, Yemen, and ^dSchool of Chemistry, University of St Andrews, St Andrews, Fife KY16 9ST, United Kingdom
^*Correspondence e-mail: fatima.setifi@univ-setif.dz, m.aldouh@hu.edu.ye

Edited by A. S. Batsanov, University of Durham, United Kingdom (Received 30 September 2022; accepted 5 November 2022; online 17 November 2022)

Two new coordination polymers of cadmium-containing polynitrile ligands have been synthesized using sovothermal methods. In both poly[trans,trans,trans-bis(μ-dicyanamido-κ²N¹:N³)bis(2-methylbenzimidazole-κN)cadmium(II)], [Cd(C₂N₃)₂(C₈H₈N₂)₂]_n, (I), and poly[trans,trans,trans-bis(2-methylbenzimidazole-κN)bis(μ-tricyanomethanido-κ²N:N′)cadmium(II)], [Cd(C₄N₃)₂(C₈H₈N₂)₂]_n, (II), the Cd atom lies on a centre of inversion, in space groups P2₁/n and P2₁/c, respectively. In each polymer, each anionic ligand acts as a bridge between two metal centres, forming sheets of 24-membered rings, and in each structure a single N—H⋯N hydrogen bond links the polymer sheets to form a three-dimensional framework structure. Comparisons are made with the structures of some related complexes.

Keywords: synthesis; cadmium complexes; polynitrile ligands; crystal structure; molecular structure; coordination polymers; hydrogen bonding.

CCDC references: 2217713; 2217712

1. Chemical context

The d¹⁰ metal complexes of zinc(II) and cadmium(II) with a variety of ligands have attracted considerable attention in recent years because of their luminescence properties (Merabet et al., 2017 ; Wang et al., 2017 ). Polynitrile compounds derived from transition-metal ions are of great interest from the perspective of their magnetic and luminescence properties, rich molecular architectures and for their topologies (Atmani et al., 2008 ; Benmansour et al., 2008 , 2010 , 2012 ; Setifi et al., 2009 ; Yuste et al., 2009 ; Setifi, Lehchili et al., 2014 ; Setifi, Setifi, El Ammari et al., 2014 ; Addala et al., 2015 ; Dmitrienko et al., 2020 ; Merabet et al., 2022 ).

Two of these small bridging polynitrile ligands that have received a lot of attention in the past decade are the dicyanamide, [N(CN)₂]⁻ (dca), and tricyanomethanide [C(CN)₃]⁻ (tcm), ions. This is partly due to their ability to produce a wide variety of coordination compounds with different nuclearity ranging from simple mononuclear to polynuclear species with complex structures (Batten & Murray, 2003 ; Setifi, Setifi, Saadi et al., 2014 ; Świtlicka-Olszewska et al., 2016 ). Different bonding modes are observed in the polynuclear complexes bridged by the dca and tcm ligands, which results in the formation of polymeric assemblies in one, two or three dimensions (Batten & Murray 2003).

As a part of our continuing study of the structural and luminescence properties of Cd^II complexes containing both polynitrile and polypyridyl units (Merabet et al., 2017; Addala et al., 2019 ), we report here the synthesis, and the crystal and molecular structure of two two-dimensional coordination polymers of cadmium containing either dicyanamide (dca⁻) or tricyanomethanide (tcm⁻) anions with 2-methyl-1H-benzimidazole (2-MeBzlm) as co-ligand, namely poly[trans,trans,trans-bis(μ-dicyanamido-κ²N¹:N³)bis(2-methylbenzimidazole-κN)cadmium(II)] (I) (Fig. 1) and poly[trans,trans,trans-bis(2-methylbenzimidazole-κN)bis(μ-tricyanomethanido-κ²N:N′)cadmium(II)] (II) (Fig. 2).

Figure 1
The coordination polyhedron in compound (I)

, showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level and the atoms marked `b', `c' and `e' are at the symmetry positions ( $[{1\over 2}]$ − x, $[{1\over 2}]$ + y, $[{1\over 2}]$ − z), (1 − x, 1 − y, 1 − z) and ( $[{1\over 2}]$ + x, $[{1\over 2}]$ − y, $[{1\over 2}]$ + z), respectively.

Figure 2
The coordination polyhedron in compound (II)

, showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level and the atoms marked `a', `c' and `e' are at the symmetry positions (1 − x, − $[{1\over 2}]$ + y, $[{1\over 2}]$ − z), (1 − x, 1 − y, 1 − z) and (x, 1.5 − y, $[{1\over 2}]$ + z), respectively.

2. Structural commentary

Despite the close similarity in their chemical constitutions (Figs. 1 and 2) and the fact that both crystallize in space group No. 14 (Table 3), they are not isomorphous, as the cell dimensions b clearly show. In each compound, the octahedral Cd^II centre lies on a centre of inversion, coordinated by a pair of neutral 2-methylbenzimidazole ligands, coordinated via atom N3 (Figs. 1 and 2) and by cyano N atoms from four anionic ligands of type [X(CN)₂]⁻, where X represents N in (I) and C—CN in (II). Each anionic ligand coordinates to two Cd centres, generating sheets of 24-membered rings, lying parallel to (10 $[\overline{1}]$ ) in (I) and to (100) in (II) (Figs. 3 and 4).

Table 3
Experimental details

	(I)	(II)
Crystal data
Chemical formula	[Cd(C₂N₃)₂(C₈H₈N₂)₂]	[Cd(C₄N₃)₂(C₈H₈N₂)₂]
M_r	508.84	556.88
Crystal system, space group	Monoclinic, P2₁/n	Monoclinic, P2₁/c
Temperature (K)	297	300
a, b, c (Å)	9.3472 (2), 8.2386 (2), 13.7448 (4)	9.4395 (4), 12.1219 (5), 10.9675 (5)
β (°)	101.908 (1)	107.342 (2)
V (Å³)	1035.68 (5)	1197.91 (9)
Z	2	2
Radiation type	Mo Kα	Mo Kα
μ (mm⁻¹)	1.09	0.95
Crystal size (mm)	0.50 × 0.34 × 0.21	0.48 × 0.36 × 0.22

Data collection
Diffractometer	Rigaku Oxford Diffraction Xcalibur, Eos, Gemini	Rigaku Oxford Diffraction Xcalibur, Eos, Gemini
Absorption correction	Multi-scan (CrysAlis PRO; Rigaku OD, 2015 )	Multi-scan (CrysAlis PRO; Rigaku OD, 2015)
T_min, T_max	0.613, 0.796	0.627, 0.812
No. of measured, independent and observed [I > 2σ(I)] reflections	47562, 3954, 3176	41742, 3664, 2869
R_int	0.057	0.050
(sin θ/λ)_max (Å⁻¹)	0.770	0.715

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.021, 0.060, 1.10	0.023, 0.060, 1.15
No. of reflections	3954	3664
No. of parameters	147	165
H-atom treatment	H atoms treated by a mixture of independent and constrained refinement	H atoms treated by a mixture of independent and constrained refinement
Δρ_max, Δρ_min (e Å⁻³)	0.37, −0.39	0.36, −0.32
Computer programs: CrysAlis PRO (Rigaku OD, 2015), SHELXS86 (Sheldrick, 2008 ), SHELXL2014 (Sheldrick, 2015 ) and PLATON (Spek, 2020 ).

Figure 3
Part of the crystal structure of compound (I)

showing the formation of a coordination polymer sheet lying parallel to (10 $[\overline{1}]$ ). For the sake of clarity, the 2-methylbenzimidazole ligands have been omitted.

Figure 4
Part of the crystal structure of compound (II)

showing the formation of a coordination polymer sheet lying parallel to (100). For the sake of clarity, the 2-methylbenzimidazole ligands have been omitted.

In each compound, the Cd—N distance for the neutral 2-methylbenzimidazole ligand is significantly less than the distances for the anionic ligands (Table 1). In both compounds, the C≡N bonds within the anionic ligands are somewhat long for their type [mean value (Allen et al., 1987 ) = 1.136 Å; upper quartile value = 1.142 Å] while the C—C bonds in the anionic ligand in (II) are somewhat short for their type (mean value 1.431 Å; lower quartile value 1.425 Å). These values are consistent, in each case, with the delocalization of the negative charge over the entire anionic ligand which, in the case of compound (II), is also reflected in the planarity of the anionic ligand, where the maximum deviation from the mean plane through the ligand atoms is only 0.054 (2) Å, for atom C31. Although only two of the three independent cyano groups in (II) are coordinated to the metal centre, there are no significant differences between the C—C and C≡N distances in the uncoordinated group and the two coordinated groups (Table 1).

Table 1
Selected bond distances (Å)

Parameter	(I)	(II)
Cd1—N3	2.3094 (11)	2.2813 (14)
Cd1—N32	2.3574 (14)	2.3845 (17)
Cd1—N33ⁱ	2.3729 (14)	2.4265 (17)
N31—C32	1.3081 (19)
N31—C33	1.3056 (18)
C31—C32		1.401 (2)
C31—C33		1.396 (2)
C31—C34		1.407 (2)
C32—N32	1.1455 (19)	1.144 (2)
C33—N33	1.1501 (18)	1.151 (2)
C34—N34		1.141 (3)
Symmetry codes: (i) $[{1\over 2}]$ + x, $[{1\over 2}]$ − y, $[{1\over 2}]$ + z for (I) and 1 − x, − $[{1\over 2}]$ + y, $[{1\over 2}]$ − z for (II).

3. Supramolecular features

The central unit X of the anionic ligand plays no role in the coordination in either compound, but it is involved in hydrogen bonding in both (Table 2). In each structure, the coordination polymer sheets are linked into a three-dimensional array by a single N—H⋯N hydrogen bond, in which the acceptor for (I) is the central N atom of the dicyanamido ligand, while in (II) the acceptor is the N atom of the uncoordinated cyano group in the tricyanomethanido ligand (Table 2). In (I), the action of the hydrogen bond links the complexes into a hydrogen-bonded sheet of R₂²(20) (Etter, 1990 ; Etter et al., 1990 ; Bernstein et al., 1995 ) rings lying parallel to (101) (Fig. 5). The combination of the polymer sheets parallel to (10 $[\overline{1}]$ ) and the hydrogen-bonded sheets parallel to (101) generates a three-dimensional structure. By contrast, in (II), the hydrogen bonding generates a chain of spiro-fused R₂²(20) rings running parallel to [101] (Fig. 6), which again links the coordination polymer sheets into a three-dimensional structure. For both structures, C—H⋯π(arene), anion–π(arene) and aromatic π–π stacking interactions are absent.

Table 2
Hydrogen-bond parameters (Å, °)

Compound	D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
(I)	N1—H1⋯N31ⁱⁱ	0.79 (2)	2.327 (19)	3.0447 (19)	151.3 (17)
(II)	N1—H1⋯N34ⁱⁱⁱ	0.80 (2)	2.12 (2)	2.906 (3)	171 (3)
Symmetry codes: (ii) − $[{1\over 2}]$ + x, $[{1\over 2}]$ − y, $[{1\over 2}]$ + z; (iii) −x, 1 − y, −z.

Figure 5
Part of the crystal structure of compound (I)

showing the formation of a hydrogen-bonded sheet of R₂²(20) rings lying parallel to (101). Hydrogen bonds are drawn as dashed lines and, for the sake of clarity, the H atoms bonded to C atoms have been omitted.

Figure 6
Part of the crystal structure of compound (II)

showing the formation of a chain of R₂²(20) rings running parallel to [101]. Hydrogen bonds are drawn as dashed lines and, for the sake of clarity, the H atoms bonded to C atoms have been omitted. The Cd atoms marked with an asterisk (*) or a hash (#) are at (−1/2, 1/2, −1/2) and (3/2, 1/2, 3/2), respectively.

4. Database survey

Coordination compounds containing either dicyanamide (dca) or tricyanomethanide (tcm) ligands were the subject, some years ago, of a comprehensive review that covered a wide range of both metal centres and co-ligands (Batten & Murray, 2003), and here we focus on just a few examples that are most closely related to the compounds (I) and (II) reported here.

Structures have been reported for (2,2′-bipy)₂Cd(dca)₂ (Mal et al., 2012 ) and for cadmium complexes of both dac and tcm containing 4-amino-3,5-bis(pyridine-2-yl)-1,2,4-triazole as the neutral co-ligand (Setifi et al., 2017 ), but these compounds all comprise monomeric complexes in which the octahedral units are linked only by hydrogen bonds and π–π stacking interactions. Although the two triazole complexes both crystallize in space group P $[\overline{1}]$ , they are not isomorphous: this behaviour mirrors that of compounds (I) and (II) reported here.

However, [Cd(1,10-phen)(dca)₂] forms a two-dimensional coordination polymer in which each dca bridges two metal centres but where some of the Cd⋯Cd links involve just one dca ligand and some involve two, forming a sheet containing both 12-membered and 36-membered rings (Luo et al., 2002 ), in contrast to the 24-membered rings found in compounds (I) and (II). The compound [Cd(dipm)(dca)₂], where (dipm) represents bis(pyrimidin-2-yl)amine, forms a three-dimensional coordination polymer framework in which each dca ligand bridges two cadmium centres such that each Cd atom is directly linked to four others (van Albada et al., 2009 ).

5. Synthesis and crystallization

All chemical reagents and solvents are commercially available and were used as received, without further purification. For the synthesis of compounds (I) and (II), a mixture of 2-methyl-1H-benzimidazole (26 mg, 0.2 mmol), cadmium acetate dihydrate (27 mg, 0.1 mmol). and 0.2 mmol of either Na(dca) [for (I)] or K(tcm) [for (II)] in a mixture of water and ethanol (3:1 v/v, 20 ml) was sealed in a Teflon-lined autoclave and heated at 438 K for 2 days. After cooling to room temperature at a rate of 10 K h⁻¹, yellow crystals were collected by filtration. Compound (I): yield 40%; analysis, found C 47.1, H 3.3, N 27.4%; C₂₀H₁₆CdN₁₀ requires C 47.2, H 3.2, N 27.5%. Compound (II): yield 45%; analysis, found C 51.5, H 3.1, N 24.9%; C₂₄H₁₆CdN₁₀ requires C 51.8, H 2.9, N 25.2%.

6. Refinement

Crystal data, data collection and refinement details are summarized in Table 3. All H atoms were located in difference maps. The H atoms bonded to C atoms were then treated as riding atoms in geometrically idealized positions with C—H distances of 0.93 Å (aromatic) or 0.96 Å (methyl), and with U_iso(H) = kU_eq(C), where k = 1.5 for the methyl groups, which were permitted to rotate but not to tilt, and 1.2 for the other H atoms bonded to C atoms. For the H atoms bonded to N atoms, the atomic coordinates were refined with U_iso(H) = 1.2U_eq(N), giving N—H distances of 0.79 (2) Å in (I) and 0.80 (3) Å in (II).

Supporting information

CCDC references: 2217713; 2217712

Crystal structure: contains datablocks global, I, II. DOI: https://doi.org/10.1107/S2056989022010672/zv2020sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989022010672/zv2020Isup2.hkl

Structure factors: contains datablock II. DOI: https://doi.org/10.1107/S2056989022010672/zv2020IIsup3.hkl

checkCIF report

Computing details top

For both structures, data collection: CrysAlis PRO (Rigaku OD, 2015); cell refinement: CrysAlis PRO (Rigaku OD, 2015); data reduction: CrysAlis PRO (Rigaku OD, 2015); program(s) used to solve structure: SHELXS86 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015); molecular graphics: PLATON (Spek, 2020); software used to prepare material for publication: SHELXL2014 (Sheldrick, 2015) and PLATON (Spek, 2020).

Poly[trans,trans,trans-bis(µ-dicyanamido-κ²N¹:N³)bis(2-methylbenzimidazole-κN)cadmium(II)] (I) top

Crystal data top

[Cd(C₂N₃)₂(C₈H₈N₂)₂]	F(000) = 508
M_r = 508.84	D_x = 1.632 Mg m⁻³
Monoclinic, P2₁/n	Mo Kα radiation, λ = 0.71073 Å
a = 9.3472 (2) Å	Cell parameters from 3954 reflections
b = 8.2386 (2) Å	θ = 2.4–33.4°
c = 13.7448 (4) Å	µ = 1.09 mm⁻¹
β = 101.908 (1)°	T = 297 K
V = 1035.68 (5) Å³	Block, yellow
Z = 2	0.50 × 0.34 × 0.21 mm

Data collection top

Rigaku Oxford Diffraction Xcalibur, Eos, Gemini diffractometer	3954 independent reflections
Radiation source: fine-focus sealed X-raytube	3176 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.057
ω scans	θ_max = 33.2°, θ_min = 2.4°
Absorption correction: multi-scan (CrysAlis PRO; Rigaku OD, 2015)	h = −14→13
T_min = 0.613, T_max = 0.796	k = −12→12
47562 measured reflections	l = −21→21

Refinement top

Refinement on F²	Hydrogen site location: mixed
Least-squares matrix: full	H atoms treated by a mixture of independent and constrained refinement
R[F² > 2σ(F²)] = 0.021	w = 1/[σ²(F_o²) + (0.0235P)² + 0.3418P] where P = (F_o² + 2F_c²)/3
wR(F²) = 0.060	(Δ/σ)_max < 0.001
S = 1.10	Δρ_max = 0.37 e Å⁻³
3954 reflections	Δρ_min = −0.39 e Å⁻³
147 parameters	Extinction correction: SHELXL, Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
0 restraints	Extinction coefficient: 0.0321 (14)
Primary atom site location: difference Fourier map

Special details top

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
Cd1	0.5000	0.5000	0.5000	0.02892 (5)
N1	0.09686 (13)	0.32891 (17)	0.59585 (11)	0.0397 (3)
H1	0.042 (2)	0.258 (2)	0.6014 (15)	0.048*
C2	0.21647 (14)	0.31228 (17)	0.55561 (11)	0.0341 (3)
N3	0.29030 (12)	0.44940 (16)	0.55912 (9)	0.0309 (2)
C3A	0.21417 (14)	0.56257 (18)	0.60516 (10)	0.0305 (2)
C4	0.24340 (16)	0.72464 (19)	0.63016 (11)	0.0381 (3)
H4	0.3243	0.7773	0.6153	0.046*
C5	0.1469 (2)	0.8046 (2)	0.67824 (13)	0.0471 (4)
H5	0.1636	0.9130	0.6957	0.056*
C6	0.0256 (2)	0.7261 (2)	0.70091 (15)	0.0557 (5)
H6	−0.0362	0.7834	0.7335	0.067*
C7	−0.00496 (19)	0.5667 (3)	0.67648 (15)	0.0518 (4)
H7	−0.0863	0.5148	0.6912	0.062*
C7A	0.09181 (16)	0.48644 (17)	0.62846 (12)	0.0358 (3)
C21	0.2554 (2)	0.1554 (2)	0.51506 (15)	0.0495 (4)
H21A	0.3303	0.1031	0.5631	0.074*
H21B	0.2906	0.1745	0.4552	0.074*
H21C	0.1705	0.0870	0.5006	0.074*
N31	0.34628 (14)	0.34457 (19)	0.16293 (10)	0.0433 (3)
C32	0.37029 (14)	0.36394 (18)	0.25940 (11)	0.0348 (3)
N32	0.40344 (15)	0.3836 (2)	0.34355 (11)	0.0520 (4)
C33	0.21918 (15)	0.29123 (17)	0.11597 (10)	0.0331 (3)
N33	0.11198 (15)	0.24538 (19)	0.06690 (10)	0.0462 (3)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cd1	0.02177 (6)	0.04283 (9)	0.02187 (7)	0.00136 (5)	0.00381 (4)	0.00049 (5)
N1	0.0306 (5)	0.0428 (7)	0.0481 (7)	−0.0057 (5)	0.0140 (5)	0.0036 (6)
C2	0.0299 (6)	0.0372 (6)	0.0360 (7)	−0.0018 (5)	0.0089 (5)	0.0005 (5)
N3	0.0273 (5)	0.0350 (5)	0.0322 (5)	−0.0006 (4)	0.0101 (4)	−0.0019 (4)
C3A	0.0271 (5)	0.0375 (6)	0.0278 (5)	0.0024 (5)	0.0080 (4)	0.0002 (5)
C4	0.0374 (7)	0.0412 (7)	0.0367 (7)	−0.0002 (6)	0.0102 (5)	−0.0035 (6)
C5	0.0542 (9)	0.0460 (8)	0.0430 (8)	0.0081 (7)	0.0146 (7)	−0.0079 (7)
C6	0.0549 (10)	0.0642 (11)	0.0558 (10)	0.0162 (8)	0.0294 (9)	−0.0033 (9)
C7	0.0416 (8)	0.0623 (11)	0.0598 (11)	0.0081 (8)	0.0295 (8)	0.0043 (9)
C7A	0.0278 (6)	0.0457 (8)	0.0360 (7)	0.0020 (5)	0.0114 (5)	0.0036 (5)
C21	0.0499 (9)	0.0379 (8)	0.0634 (11)	−0.0046 (7)	0.0182 (8)	−0.0075 (7)
N31	0.0344 (6)	0.0633 (8)	0.0321 (6)	−0.0085 (6)	0.0069 (5)	−0.0073 (6)
C32	0.0269 (5)	0.0421 (7)	0.0347 (7)	−0.0012 (5)	0.0049 (5)	−0.0068 (5)
N32	0.0392 (7)	0.0806 (11)	0.0346 (7)	−0.0079 (7)	0.0037 (5)	−0.0142 (7)
C33	0.0358 (6)	0.0366 (6)	0.0279 (6)	−0.0022 (5)	0.0088 (5)	−0.0043 (5)
N33	0.0417 (6)	0.0580 (8)	0.0385 (7)	−0.0116 (6)	0.0075 (5)	−0.0127 (6)

Geometric parameters (Å, º) top

Cd1—N3	2.3094 (11)	C4—H4	0.9300
Cd1—N3ⁱ	2.3094 (11)	C5—C6	1.395 (3)
Cd1—N32	2.3574 (14)	C5—H5	0.9300
Cd1—N32ⁱ	2.3574 (14)	C6—C7	1.371 (3)
Cd1—N33ⁱⁱ	2.3729 (14)	C6—H6	0.9300
Cd1—N33ⁱⁱⁱ	2.3729 (14)	C7—C7A	1.392 (2)
N1—C2	1.3528 (18)	C7—H7	0.9300
N1—C7A	1.377 (2)	C21—H21A	0.9600
N1—H1	0.79 (2)	C21—H21B	0.9600
C2—N3	1.3194 (18)	C21—H21C	0.9600
C2—C21	1.482 (2)	N31—C33	1.3056 (18)
N3—C3A	1.4008 (18)	N31—C32	1.3081 (19)
C3A—C4	1.392 (2)	C32—N32	1.1455 (19)
C3A—C7A	1.3983 (19)	C33—N33	1.1501 (18)
C4—C5	1.389 (2)	N33—Cd1^iv	2.3729 (14)

N3—Cd1—N3ⁱ	180.0	C5—C4—C3A	117.30 (14)
N3—Cd1—N32	93.12 (5)	C5—C4—H4	121.3
N3ⁱ—Cd1—N32	86.88 (5)	C3A—C4—H4	121.3
N3—Cd1—N32ⁱ	86.88 (5)	C4—C5—C6	121.57 (16)
N3ⁱ—Cd1—N32ⁱ	93.12 (5)	C4—C5—H5	119.2
N32—Cd1—N32ⁱ	180.00 (4)	C6—C5—H5	119.2
N3—Cd1—N33ⁱⁱ	92.78 (5)	C7—C6—C5	121.85 (15)
N3ⁱ—Cd1—N33ⁱⁱ	87.22 (5)	C7—C6—H6	119.1
N32—Cd1—N33ⁱⁱ	93.56 (6)	C5—C6—H6	119.1
N32ⁱ—Cd1—N33ⁱⁱ	86.44 (6)	C6—C7—C7A	116.61 (16)
N3—Cd1—N33ⁱⁱⁱ	87.22 (5)	C6—C7—H7	121.7
N3ⁱ—Cd1—N33ⁱⁱⁱ	92.78 (5)	C7A—C7—H7	121.7
N32—Cd1—N33ⁱⁱⁱ	86.44 (6)	N1—C7A—C7	132.17 (15)
N32ⁱ—Cd1—N33ⁱⁱⁱ	93.56 (6)	N1—C7A—C3A	105.29 (12)
N33ⁱⁱ—Cd1—N33ⁱⁱⁱ	180.0	C7—C7A—C3A	122.53 (15)
C2—N1—C7A	108.37 (12)	C2—C21—H21A	109.5
C2—N1—H1	124.9 (14)	C2—C21—H21B	109.5
C7A—N1—H1	126.7 (14)	H21A—C21—H21B	109.5
N3—C2—N1	111.63 (13)	C2—C21—H21C	109.5
N3—C2—C21	126.37 (13)	H21A—C21—H21C	109.5
N1—C2—C21	121.99 (13)	H21B—C21—H21C	109.5
C2—N3—C3A	106.01 (11)	C33—N31—C32	119.37 (13)
C2—N3—Cd1	128.11 (9)	N32—C32—N31	174.18 (15)
C3A—N3—Cd1	125.87 (9)	C32—N32—Cd1	162.06 (15)
C4—C3A—C7A	120.14 (13)	N33—C33—N31	173.85 (15)
C4—C3A—N3	131.15 (13)	C33—N33—Cd1^iv	140.21 (14)
C7A—C3A—N3	108.70 (13)

C7A—N1—C2—N3	−0.36 (18)	C3A—C4—C5—C6	0.1 (3)
C7A—N1—C2—C21	178.79 (15)	C4—C5—C6—C7	−0.4 (3)
N1—C2—N3—C3A	0.33 (17)	C5—C6—C7—C7A	0.5 (3)
C21—C2—N3—C3A	−178.78 (15)	C2—N1—C7A—C7	−178.60 (19)
N1—C2—N3—Cd1	−178.65 (10)	C2—N1—C7A—C3A	0.23 (17)
C21—C2—N3—Cd1	2.2 (2)	C6—C7—C7A—N1	178.30 (19)
C2—N3—C3A—C4	178.46 (15)	C6—C7—C7A—C3A	−0.4 (3)
Cd1—N3—C3A—C4	−2.5 (2)	C4—C3A—C7A—N1	−178.84 (13)
C2—N3—C3A—C7A	−0.17 (16)	N3—C3A—C7A—N1	−0.03 (17)
Cd1—N3—C3A—C7A	178.83 (10)	C4—C3A—C7A—C7	0.1 (2)
C7A—C3A—C4—C5	0.0 (2)	N3—C3A—C7A—C7	178.93 (16)
N3—C3A—C4—C5	−178.51 (15)

Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x+1/2, −y+1/2, z+1/2; (iii) −x+1/2, y+1/2, −z+1/2; (iv) −x+1/2, y−1/2, −z+1/2.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N1—H1···N31^v	0.79 (2)	2.327 (19)	3.0447 (19)	151.3 (17)

Symmetry code: (v) x−1/2, −y+1/2, z+1/2.

Poly[trans,trans,trans-bis(2-methylbenzimidazole-κN)bis(µ-tricyanomethanido-κ²N:N')cadmium(II)] (II) top

Crystal data top

[Cd(C₄N₃)₂(C₈H₈N₂)₂]	F(000) = 556
M_r = 556.88	D_x = 1.544 Mg m⁻³
Monoclinic, P2₁/c	Mo Kα radiation, λ = 0.71073 Å
a = 9.4395 (4) Å	Cell parameters from 3664 reflections
b = 12.1219 (5) Å	θ = 2.3–30.6°
c = 10.9675 (5) Å	µ = 0.95 mm⁻¹
β = 107.342 (2)°	T = 300 K
V = 1197.91 (9) Å³	Block, yellow
Z = 2	0.48 × 0.36 × 0.22 mm

Data collection top

Rigaku Oxford Diffraction Xcalibur, Eos, Gemini diffractometer	3664 independent reflections
Radiation source: fine-focus sealed X-raytube	2869 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.050
ω scans	θ_max = 30.6°, θ_min = 2.3°
Absorption correction: multi-scan (CrysAlis PRO; Rigaku OD, 2015)	h = −13→13
T_min = 0.627, T_max = 0.812	k = −17→17
41742 measured reflections	l = −15→15

Refinement top

Refinement on F²	Hydrogen site location: mixed
Least-squares matrix: full	H atoms treated by a mixture of independent and constrained refinement
R[F² > 2σ(F²)] = 0.023	w = 1/[σ²(F_o²) + (0.0175P)² + 0.6078P] where P = (F_o² + 2F_c²)/3
wR(F²) = 0.060	(Δ/σ)_max = 0.001
S = 1.15	Δρ_max = 0.36 e Å⁻³
3664 reflections	Δρ_min = −0.32 e Å⁻³
165 parameters	Extinction correction: SHELXL, Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
0 restraints	Extinction coefficient: 0.0182 (9)
Primary atom site location: difference Fourier map

Special details top

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å²) top

	x	y	z	U_iso*/U_eq
Cd1	0.5000	0.5000	0.5000	0.02855 (6)
N1	0.01561 (17)	0.54588 (14)	0.31770 (16)	0.0392 (3)
H1	−0.057 (3)	0.5291 (19)	0.262 (2)	0.047*
C2	0.15085 (19)	0.50291 (14)	0.32869 (16)	0.0329 (3)
N3	0.25220 (15)	0.53853 (12)	0.43361 (13)	0.0307 (3)
C3A	0.17551 (17)	0.60782 (13)	0.49471 (16)	0.0306 (3)
C4	0.2229 (2)	0.66514 (14)	0.60956 (18)	0.0377 (4)
H4	0.3207	0.6604	0.6614	0.045*
C5	0.1199 (3)	0.72950 (16)	0.6442 (2)	0.0492 (5)
H5	0.1497	0.7695	0.7199	0.059*
C6	−0.0273 (3)	0.73568 (18)	0.5684 (3)	0.0544 (5)
H6	−0.0931	0.7807	0.5939	0.065*
C7	−0.0774 (2)	0.67687 (17)	0.4569 (2)	0.0495 (5)
H7	−0.1763	0.6794	0.4074	0.059*
C7A	0.02632 (19)	0.61325 (14)	0.42113 (18)	0.0359 (4)
C21	0.1739 (2)	0.42717 (19)	0.2308 (2)	0.0498 (5)
H21A	0.2681	0.3910	0.2635	0.075*
H21B	0.1723	0.4683	0.1557	0.075*
H21C	0.0962	0.3730	0.2097	0.075*
C31	0.43763 (19)	0.62012 (14)	0.06929 (16)	0.0331 (3)
C32	0.48307 (19)	0.57340 (14)	0.19170 (17)	0.0335 (3)
N32	0.5172 (2)	0.53331 (16)	0.29060 (16)	0.0463 (4)
C33	0.49794 (19)	0.72007 (15)	0.04552 (18)	0.0366 (4)
N33	0.5467 (2)	0.80337 (14)	0.02750 (18)	0.0493 (4)
C34	0.3206 (2)	0.57001 (16)	−0.02502 (18)	0.0399 (4)
N34	0.2261 (2)	0.5271 (2)	−0.09988 (19)	0.0639 (6)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cd1	0.02870 (9)	0.02952 (9)	0.02575 (9)	0.00129 (6)	0.00556 (6)	−0.00031 (6)
N1	0.0298 (7)	0.0451 (8)	0.0354 (8)	−0.0072 (6)	−0.0016 (6)	0.0055 (7)
C2	0.0320 (7)	0.0355 (8)	0.0283 (7)	−0.0068 (7)	0.0046 (6)	0.0005 (7)
N3	0.0299 (6)	0.0320 (6)	0.0280 (7)	−0.0027 (5)	0.0053 (5)	−0.0021 (5)
C3A	0.0289 (7)	0.0291 (7)	0.0336 (8)	−0.0025 (6)	0.0088 (6)	0.0029 (6)
C4	0.0397 (9)	0.0358 (8)	0.0393 (10)	−0.0030 (7)	0.0143 (7)	−0.0021 (7)
C5	0.0593 (12)	0.0394 (10)	0.0567 (13)	−0.0013 (9)	0.0295 (10)	−0.0071 (9)
C6	0.0532 (12)	0.0443 (11)	0.0757 (16)	0.0099 (9)	0.0345 (12)	0.0052 (10)
C7	0.0341 (9)	0.0478 (11)	0.0676 (14)	0.0077 (8)	0.0167 (9)	0.0170 (10)
C7A	0.0309 (8)	0.0356 (8)	0.0398 (9)	−0.0030 (6)	0.0085 (7)	0.0083 (7)
C21	0.0488 (11)	0.0607 (12)	0.0369 (10)	−0.0145 (10)	0.0082 (9)	−0.0151 (9)
C31	0.0338 (8)	0.0333 (8)	0.0288 (8)	0.0009 (6)	0.0044 (6)	0.0015 (6)
C32	0.0328 (8)	0.0354 (8)	0.0312 (9)	−0.0003 (6)	0.0077 (6)	−0.0030 (6)
N32	0.0488 (9)	0.0564 (9)	0.0313 (8)	−0.0008 (8)	0.0085 (7)	0.0050 (7)
C33	0.0358 (8)	0.0359 (8)	0.0353 (9)	0.0049 (7)	0.0065 (7)	0.0018 (7)
N33	0.0497 (9)	0.0371 (8)	0.0577 (11)	0.0016 (7)	0.0107 (8)	0.0084 (8)
C34	0.0366 (9)	0.0477 (10)	0.0319 (9)	−0.0004 (8)	0.0050 (7)	0.0055 (7)
N34	0.0508 (11)	0.0863 (15)	0.0426 (11)	−0.0169 (10)	−0.0043 (9)	−0.0005 (10)

Geometric parameters (Å, º) top

Cd1—N3	2.2813 (14)	C5—C6	1.392 (3)
Cd1—N3ⁱ	2.2813 (14)	C5—H5	0.9300
Cd1—N32	2.3845 (17)	C6—C7	1.372 (3)
Cd1—N32ⁱ	2.3845 (17)	C6—H6	0.9300
Cd1—N33ⁱⁱ	2.4265 (17)	C7—C7A	1.391 (3)
Cd1—N33ⁱⁱⁱ	2.4265 (17)	C7—H7	0.9300
N1—C2	1.351 (2)	C21—H21A	0.9600
N1—C7A	1.377 (3)	C21—H21B	0.9600
N1—H1	0.80 (3)	C21—H21C	0.9600
C2—N3	1.330 (2)	C31—C33	1.396 (2)
C2—C21	1.477 (3)	C31—C32	1.401 (2)
N3—C3A	1.403 (2)	C31—C34	1.407 (2)
C3A—C4	1.391 (2)	C32—N32	1.144 (2)
C3A—C7A	1.400 (2)	C33—N33	1.151 (2)
C4—C5	1.386 (3)	N33—Cd1^iv	2.4264 (17)
C4—H4	0.9300	C34—N34	1.141 (3)

N3—Cd1—N3ⁱ	180.0	C5—C4—H4	121.1
N3—Cd1—N32	90.89 (6)	C3A—C4—H4	121.1
N3ⁱ—Cd1—N32	89.11 (6)	C4—C5—C6	121.6 (2)
N3—Cd1—N32ⁱ	89.11 (6)	C4—C5—H5	119.2
N3ⁱ—Cd1—N32ⁱ	90.89 (6)	C6—C5—H5	119.2
N32—Cd1—N32ⁱ	180.0	C7—C6—C5	121.45 (19)
N3—Cd1—N33ⁱⁱ	88.27 (6)	C7—C6—H6	119.3
N3ⁱ—Cd1—N33ⁱⁱ	91.73 (6)	C5—C6—H6	119.3
N32—Cd1—N33ⁱⁱ	83.76 (6)	C6—C7—C7A	117.05 (19)
N32ⁱ—Cd1—N33ⁱⁱ	96.24 (6)	C6—C7—H7	121.5
N3—Cd1—N33ⁱⁱⁱ	91.73 (6)	C7A—C7—H7	121.5
N3ⁱ—Cd1—N33ⁱⁱⁱ	88.27 (6)	N1—C7A—C7	132.53 (18)
N32—Cd1—N33ⁱⁱⁱ	96.24 (6)	N1—C7A—C3A	105.14 (15)
N32ⁱ—Cd1—N33ⁱⁱⁱ	83.76 (6)	C7—C7A—C3A	122.33 (18)
N33ⁱⁱ—Cd1—N33ⁱⁱⁱ	180.0	C2—C21—H21A	109.5
C2—N1—C7A	108.66 (15)	C2—C21—H21B	109.5
C2—N1—H1	123.1 (17)	H21A—C21—H21B	109.5
C7A—N1—H1	128.1 (17)	C2—C21—H21C	109.5
N3—C2—N1	111.65 (16)	H21A—C21—H21C	109.5
N3—C2—C21	127.35 (17)	H21B—C21—H21C	109.5
N1—C2—C21	121.00 (16)	C33—C31—C32	120.29 (16)
C2—N3—C3A	105.49 (14)	C33—C31—C34	120.81 (16)
C2—N3—Cd1	127.90 (12)	C32—C31—C34	118.62 (16)
C3A—N3—Cd1	126.59 (10)	N32—C32—C31	178.2 (2)
C4—C3A—C7A	119.70 (16)	C32—N32—Cd1	154.77 (16)
C4—C3A—N3	131.24 (15)	N33—C33—C31	178.8 (2)
C7A—C3A—N3	109.05 (15)	C33—N33—Cd1^iv	144.66 (16)
C5—C4—C3A	117.83 (18)	N34—C34—C31	178.4 (2)

C7A—N1—C2—N3	−0.5 (2)	C3A—C4—C5—C6	1.1 (3)
C7A—N1—C2—C21	−179.83 (17)	C4—C5—C6—C7	1.1 (3)
N1—C2—N3—C3A	0.92 (19)	C5—C6—C7—C7A	−1.8 (3)
C21—C2—N3—C3A	−179.79 (18)	C2—N1—C7A—C7	179.92 (19)
N1—C2—N3—Cd1	−177.68 (11)	C2—N1—C7A—C3A	−0.17 (19)
C21—C2—N3—Cd1	1.6 (3)	C6—C7—C7A—N1	−179.71 (19)
C2—N3—C3A—C4	177.72 (18)	C6—C7—C7A—C3A	0.4 (3)
Cd1—N3—C3A—C4	−3.7 (3)	C4—C3A—C7A—N1	−178.17 (15)
C2—N3—C3A—C7A	−1.01 (18)	N3—C3A—C7A—N1	0.73 (18)
Cd1—N3—C3A—C7A	177.61 (11)	C4—C3A—C7A—C7	1.7 (3)
C7A—C3A—C4—C5	−2.4 (3)	N3—C3A—C7A—C7	−179.35 (16)
N3—C3A—C4—C5	178.93 (18)

Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x, −y+3/2, z+1/2; (iii) −x+1, y−1/2, −z+1/2; (iv) −x+1, y+1/2, −z+1/2.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
N1—H1···N34^v	0.80 (2)	2.12 (2)	2.906 (3)	171 (3)

Symmetry code: (v) −x, −y+1, −z.

Selected bond distances (Å) top

Parameter	(I)	(II)
Cd1—N3	2.3094 (11)	2.2813 (14)
Cd1—N32	2.3574 (14)	2.3845 (17)
Cd1—N33ⁱ	2.3729 (14)	2.4265 (17)
N31—C32	1.3081 (19)
N31—C33	1.3056 (18)
C31—C32		1.401 (2)
C31—C33		1.396 (2)
C31—C34		1.407 (2)
C32—N32	1.1455 (19)	1.144 (2)
C33—N33	1.1501 (18)	1.151 (2)
C34—N34		1.141 (3)

Symmetry codes: (i) 1/2 + x, 1/2 - y, 1/2 + z for (I) and 1 - x, -1/2 + y, 1/2 - z for (II).

Hydrogen bond parameters (Å, °) top

Compound	D—H···A	D—H	H···A	D···A	D—H···A
(I)	N1—H1···N31ⁱⁱ	0.79 (2)	2.327 (19)	3.0447 (19)	151.3 (17)
(II)	N1—H1···N34ⁱⁱⁱ	0.80 (2)	2.12 (2)	2.906 (3)	171 (3)

Symmetry codes: (ii) -1/2 + x, 1/2 - y, 1/2 + z; (iii) -x, 1 - y, -z.

Acknowledgements

Author contributions are as follows. Conceptualization, ZS and MHAD; methodology, ZS and MHAD; investigation, LM and LK; writing (original draft), CG and ZS; writing (review and editing of the manuscript), CG, FS and ZS; visualization, ZS and FS; funding acquisition, ZS and MHAD; resources, FS; supervision, FS.

Funding information

Funding for this research was provided by: the Algerian MESRS (Ministère de l'Enseignement Supérieur et de la Recherche Scientifique); the Algerian DGRSDT (Direction Générale de la Recherche Scientifique et du Développement Technologique; PRFU project (grant No. B00L01UN190120230003).

References

Addala, A., Poupon, M., Bernès, S., Kürkçüoğlu, G. S., Liu, X., Lehchili, F., Kučeráková, M., Dušek, M., Setifi, F., Setifi, Z. & Reedijk, J. (2019). Polyhedron, 170, 271–277. CSD CrossRef CAS Google Scholar
Addala, A., Setifi, F., Kottrup, K. G., Glidewell, C., Setifi, Z., Smith, G. & Reedijk, J. (2015). Polyhedron, 87, 307–310. Web of Science CSD CrossRef CAS Google Scholar
Albada, G. A. van, van der Horst, M. G., Teat, S. J., Gamez, P., Roubeau, O., Mutikainen, I., Turpeinen, U. & Reedijk, J. (2009). Polyhedron, 28, 1541–1545. CSD CrossRef Google Scholar
Allen, F. H., Kennard, O., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (1987). J. Chem. Soc. Perkin Trans. 2, pp. S1–S19. CrossRef Web of Science Google Scholar
Atmani, C., Setifi, F., Benmansour, S., Triki, S., Marchivie, M., Salaün, J.-Y. & Gómez-García, C. J. (2008). Inorg. Chem. Commun. 11, 921–924. Web of Science CSD CrossRef CAS Google Scholar
Batten, S. R. & Murray, K. S. (2003). Coord. Chem. Rev. 246, 103–130. Web of Science CrossRef CAS Google Scholar
Benmansour, S., Atmani, C., Setifi, F., Triki, S., Marchivie, M. & Gómez-García, C. J. (2010). Coord. Chem. Rev. 254, 1468–1478. Web of Science CrossRef CAS Google Scholar
Benmansour, S., Setifi, F., Gómez-García, C. J., Triki, S., Coronado, E. & Salaün, J. (2008). J. Mol. Struct. 890, 255–262. Web of Science CSD CrossRef CAS Google Scholar
Benmansour, S., Setifi, F., Triki, S. & Gómez-García, C. J. (2012). Inorg. Chem. 51, 2359–2365. Web of Science CSD CrossRef CAS PubMed Google Scholar
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555–1573. CrossRef CAS Web of Science Google Scholar
Dmitrienko, A. O., Buzin, M. I., Setifi, Z., Setifi, F., Alexandrov, E. V., Voronova, E. D. & Vologzhanina, A. V. (2020). Dalton Trans. 49, 7084–7092. CSD CrossRef CAS PubMed Google Scholar
Etter, M. C. (1990). Acc. Chem. Res. 23, 120–126. CrossRef CAS Web of Science Google Scholar
Etter, M. C., MacDonald, J. C. & Bernstein, J. (1990). Acta Cryst. B46, 256–262. CrossRef ICSD CAS Web of Science IUCr Journals Google Scholar
Lehchili, F., Setifi, F., Liu, X., Saneei, A., Kučeráková, M., Setifi, Z., Dušek, M., Poupon, M., Pourayoubi, M. & Reedijk, J. (2017). Polyhedron, 131, 27–33. Web of Science CSD CrossRef CAS Google Scholar
Luo, J.-H., Hong, M.-C., Cao, R., Liang, Y.-C., Zhao, Y., Wang, R. & Weng, J. (2002). Polyhedron, 21, 893–898. CSD CrossRef CAS Google Scholar
Mal, D., Sen, R., Brandao, P. & Lin, Z. (2012). Acta Cryst. E68, m1428. CSD CrossRef IUCr Journals Google Scholar
Merabet, L., Vologzhanina, A. V., Setifi, Z., Kaboub, L. & Setifi, F. (2022). CrystEngComm, 24, 4740–4747. CSD CrossRef CAS Google Scholar
Rigaku OD (2015). CrysAlis PRO. Agilent Technologies Inc., Santa Clara, CA, USA. Google Scholar
Setifi, F., Benmansour, S., Marchivie, M., Dupouy, G., Triki, S., Sala-Pala, J., Salaün, J.-Y., Gómez-García, C. J., Pillet, S., Lecomte, C. & Ruiz, E. (2009). Inorg. Chem. 48, 1269–1271. Web of Science CSD CrossRef PubMed CAS Google Scholar
Setifi, Z., Lehchili, F., Setifi, F., Beghidja, A., Ng, S. W. & Glidewell, C. (2014). Acta Cryst. C70, 338–341. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Setifi, Z., Setifi, F., El Ammari, L., El-Ghozzi, M., Sopková-de Oliveira Santos, J., Merazig, H. & Glidewell, C. (2014). Acta Cryst. C70, 19–22. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Setifi, Z., Setifi, F., Saadi, M., Rouag, D.-A. & Glidewell, C. (2014). Acta Cryst. C70, 359–363. Web of Science CSD CrossRef IUCr Journals Google Scholar
Setifi, Z., Zambon, D., Setifi, F., El-Ghozzi, M., Mahiou, R. & Glidewell, C. (2017). Acta Cryst. C73, 674–681. Web of Science CSD CrossRef IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Sheldrick, G. M. (2015). Acta Cryst. C71, 3–8. Web of Science CrossRef IUCr Journals Google Scholar
Spek, A. L. (2020). Acta Cryst. E76, 1–11. Web of Science CrossRef IUCr Journals Google Scholar
Świtlicka-Olszewska, A., Palion-Gazda, J., Klemens, T., Machura, B., Vallejo, J., Cano, J., Lloret, F. & Julve, M. (2016). Dalton Trans. 45, 10181–10193. PubMed Google Scholar
Wang, Y., Jia, W., Chen, R., Zhao, X.-J. & Wang, Z.-L. (2017). Chem. Commun. 53, 636–639. CSD CrossRef CAS Google Scholar
Yuste, C., Bentama, A., Marino, N., Armentano, D., Setifi, F., Triki, S., Lloret, F. & Julve, M. (2009). Polyhedron, 28, 1287–1294. Web of Science CSD CrossRef CAS Google Scholar

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 78| Part 12| December 2022| Pages 1238-1243

https://doi.org/10.1107/S2056989022010672

Open

access

Format		BIBTeX
		EndNote
		RefMan
		Refer
		Medline
		CIF
		SGML
		Plain Text
		Text

Format		BIBTeX
		EndNote
		RefMan
		Refer
		Medline
		CIF
		SGML
		Plain Text
		Text

Search IUCr Journals		doi		Advanced search
Author		volume	page

research communications\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\)

Solvothermal synthesis and crystal structures of two new cadmium coordination polymers containing polynitrile ligands

1. Chemical context

2. Structural commentary

3. Supra­molecular features

4. Database survey

5. Synthesis and crystallization

6. Refinement

Supporting information

Acknowledgements

Funding information

References

research communications

3. Supramolecular features