Bis(μ-N,N-di­allyl­dithio­carbamato)bis[(N,N-di­allyl­dithio­carbamato)cadmium]

Onwudiwe, D.C.; Hrubaru, M.; Hosten, E.C.; Arderne, C.

doi:10.1107/S2056989017011616

research communications

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 73| Part 9| September 2017| Pages 1353-1356

https://doi.org/10.1107/S2056989017011616

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Bis(μ-N,N-diallyldithiocarbamato)bis[(N,N-diallyldithiocarbamato)cadmium]

Damian C. Onwudiwe,^a,^b Madalina Hrubaru,^c Eric C. Hosten ^d and Charmaine Arderne ^e ^*

^aDepartment of Chemistry, School of Mathematical and Physical Sciences Faculty of Agriculture, Science and Technology, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho 2735, South Africa, ^bMaterial Science Innovation and Modelling (MaSIM) Research Focus Area, Faculty of Agriculture, Science and Technology, North-West University (Mafikeng Campus), Private Bag X2046, Mmabatho, South Africa, ^cC.D. Nenitescu Center of Organic Chemistry of the Romania Academy, Splaiul Independentei, 2023, Bucharest, Romania, ^dDepartment of Chemistry, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031, South Africa, and ^eDepartment of Chemistry, University of Johannesburg, PO Box 524, Auckland Park, Johannesburg 2006, South Africa
^*Correspondence e-mail: carderne@uj.ac.za

Edited by M. Zeller, Purdue University, USA (Received 19 July 2017; accepted 7 August 2017; online 21 August 2017)

The title compound, [Cd₂(C₇H₁₀NS₂)₄], is a neutral dinuclear cadmium(II) complex bearing four bis N,N-diallyldithiocarbamate ligands coordinating to two Cd^II cations. In each of the monomeric subunits, there are four S atoms of two dithiocarbamate ligands [Cd—S = 2.5558 (3), 2.8016 (3), 2.6050 (3) and 2.5709 (3) Å] that coordinate to one Cd^II atom in a bidentate mode. The dimers are located over an inversion centre bridged by two additional bridging Cd—S bonds [2.6021 (3) Å], leading to a substantial distortion of the geometry of the monomeric subunit from the expected square-planar geometry. The five-coordinate environment around each of the Cd^II ions in the dimer is best described as substantially tetragonally distorted square pyramidal. The dithiocarbamate groups are themselves planar and are also coplanar with the Cd^II ions. The negative charge on these groups is delocalized by resonance across the S atoms bound to the Cd^II cation. This delocalization of the π electrons in the dithiocarbamate groups also extends to the C—N bonds as they reveal significant double bond character [C—N = 1.3213 (16) and 1.3333 (15) Å].

Keywords: crystal structure; cadmium(II) complex; N,N-diallylldithiocarbamate ligands; bridging dimeric structure.

CCDC reference: 899314

1. Chemical context

Interest in the study of metal dithiocarbamates was aroused because of their interesting structural features and diverse applications (Thammakan & Somsook, 2006 ). Dithiocarbamate complexes have largely been prepared from the group 12 elements, mostly because they have found wide practical application as additives to pavement asphalt, as antioxidants, and as potent pesticides etc (Subha et al., 2010 ). The structural chemistry of cadmium dithiocarbamates of the general formula Cd(S₂CNRR′) where R, R′ = alkyl or aryl is dominated by its existence in binuclear form. This common feature has been ascribed to the effect of aggregated species, which they adopt in the solid state, resulting from equal numbers of μ₂-tridentate and bidentate (chelating) ligands (Tiekink, 2003 ; Tan, Halim et al., 2016 ). Only a few exceptions have been reported where the complex exists in a trinuclear form (Kumar et al., 2014 ), or as a one-dimensional polymeric motif (Tan et al., 2013 , 2016; Ferreira et al., 2016 ). Bis(N,N-diallyldithiocarbamato)cadmium compounds have the advantage of having stability similar to that of the zinc complexes, but more favourable stability when compared to the mercury complexes. Cadmium dithiocarbamate complexes have been widely used as single-source precursors for CdS nanoparticles and thin films, which have application as non-linear optical materials (Thammakan & Somsook, 2006). Another important practical application of cadmium dithiocarbamates is their ability to efficiently collect gold from acidic solutions (Rodina et al., 2014 ). Here we describe the crystal structure of a Cd^II complex bearing a diallyldithiocarabamate ligand in a chelating and bridging dimeric structure.

2. Structural commentary

The coordination environment of the Cd^II cation is observed to have a distorted tetragonal–pyramidal geometry (Fig. 1). The Cd^II cation is coordinated by four S atoms with distances ranging from 2.5558 (3) to 2.8016 (3) Å and to a fifth S atom at a distance of 2.6021 (3) Å; these distances are similar to other complexes found to have been published previously (see Section 4: Database survey). A full geometry check carried out with the Mogul Geometry Check tool (Bruno et al., 2004 ) within the CSD suite of programs, showed no unusual geometrical parameters. The fifth S atom, S12ⁱ, is from a third ligand that is in the coordination sphere of a centrosymmetrically related Cd^II ion [symmetry code: (i) –x + 2, –y, –z + 1]. This means that each bridging S atom simultaneously occupies an equatorial coordination site on one Cd^II ion and an apical site on the other Cd^II ion to form an edge-shared tetragonal–pyramidal geometry. The Cd^II ion deviates from the S11—S12—S22—S21 mean plane by 0.704016 (17) Å towards S12ⁱ. The bridging network Cd1—S12—Cd1ⁱ—S12ⁱ is completely planar since it lies over the inversion centre with a Cd1⋯Cd1ⁱ separation distance of 3.60987 (8) Å and S12—Cd1—S12ⁱ and Cd1—S12—Cd1ⁱ angles of 96.257 (9) and 83.743 (9)°, respectively. There is substantial distortion of the geometry of the monomeric subunit from the expected square-planar geometry. Deviations from the standard 90° angles are evident in the angles of S11—Cd1—S21 [108.203 (11)°]; S22—Cd1—S21 [70.264 (10)°]; S22—Cd1—S12 [96.950 (10)°] and S11—Cd1—S12 [67.486 (10)°]. Deviations in the standard 180° angles are evident in the angles of S11—Cd1—S22 [143.705 (13)°] and S21—Cd1—S12 [152.651 (11)°]. The Cd1—S12—Cd1ⁱ—S12ⁱ and S11—S12—S22—S21 mean planes form a dihedral (twist) angle of 84.6228 (18)°. The dithiocarbamate groups are planar and each group of the monomeric subunit is coplanar with the Cd^II ion (r.m.s. deviation is 0.010 Å). The mean plane consisting of atoms Cd1, S11, N1, C11, S12 and the mean plane consisting of atoms Cd1, S22, N2, C21, S21 have a plane-normal-to-plane-normal angle of 37.0291 (10)°; a centroid-to-centroid distance of 4.45354 (8) Å; a plane-to-plane shift of 4.22298 (8) Å and a plane-to-plane torsion (twist) angle of 8.0304 (12)°.

Figure 1
The molecular structure of the title compound, showing 50% probability displacement ellipsoids and the atomic numbering scheme [symmetry code: (i) −x + 2, −y, −z + 1]. H atoms have been omitted for clarity.

The S12—C11 bond length [1.7532 (13) Å] is longer than the adjacent S11—C11 bond length [1.7162 (13) Å] suggesting that this bond has more double bond character in the dithiocarbamate portion that coordinates to the Cd^II cation. On the opposite side of the Cd^II ion, both S—C bonds have approximately the same length, where S21—C21 and S22—C21 bond lengths are 1.7224 (12) and 1.7263 (12) Å, respectively, suggesting that the double bond of the dithiocarbamate is spread over the S—C—S bond via resonance. A possible explanation for this may be because of the fact that atom S12 serves as the bridging S atom in the complex. Also, the N1—C11 and N2—C21 distances [1.3213 (16) and 1.3333 (15) Å, respectively] are shorter compared to the other N—C distances indicating considerable double-bond character. The vinyl substituents are also planar and are at an angle of 91.6049 (14)° from the dithiocarbamate plane and at an angle of 150.9196 (6)° from the vinyl group directly opposite from it. This scenario is comparable with the other structures surveyed in the literature (see Section 4: Database survey). All highlighted and discussed geometrical parameters describing the coordination environment are given in Table 1. Weak intramolecular C—H⋯S interactions are observed (Table 2)

Table 1
Selected geometric parameters (Å, °)

Cd1—S11	2.5558 (3)	S12—C11	1.7532 (13)
Cd1—S22	2.5709 (3)	S21—C21	1.7224 (12)
Cd1—S12ⁱ	2.6021 (3)	S22—C21	1.7263 (12)
Cd1—S21	2.6050 (3)	N1—C11	1.3213 (16)
Cd1—S12	2.8016 (3)	N2—C21	1.3333 (15)
S11—C11	1.7162 (13)

S11—Cd1—S22	143.705 (13)	S22—Cd1—S12	96.950 (10)
S11—Cd1—S21	108.203 (11)	S12ⁱ—Cd1—S12	96.257 (9)
S22—Cd1—S21	70.264 (10)	S21—Cd1—S12	152.651 (11)
S11—Cd1—S12	67.486 (10)	Cd1ⁱ—S12—Cd1	83.743 (9)
Symmetry code: (i) -x+2, -y, -z+1.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
C12—H12B⋯S11	0.99	2.59	2.9783 (14)	103
C15—H15A⋯S12	0.99	2.50	3.0438 (14)	115
C22—H22B⋯S21	0.99	2.50	3.0381 (13)	114
C25—H25B⋯S22	0.99	2.56	2.9845 (14)	106

3. Supramolecular features

The space group of the crystal is P $[\overline{1}]$ , and the asymmetric unit consists of one-half of the complex molecule, so that the unit cell contains one complete complex molecule. Each half of the asymmetric unit is related by an inversion centre. In the crystal, weak C—H⋯π interactions are observed, forming chains along [001] (see Fig. 2 and Table 3).

Table 3
X—H⋯π interactions

Cg3 is the centroid of the Cd1—S11—C11—S12—Cd1ⁱ—S12ⁱ ring.

C—H⋯Cg	C—H	H⋯Cg	C⋯Cg	C—H⋯Cg
C15—H15B⋯Cg3	0.99	2.94	3.9209 (17)	171
C16—H16⋯Cg3	0.99	2.90	3.7648 (17)	152
Symmetry code: (i) −x + 2, −y, −z + 1.

Figure 2
The crystal structure of the title compound constructed from chains formed by C—H⋯S interactions (red dashed lines). [Authors: Please add unit cell outline and coordinate axes]

4. Database survey

A search of the Cambridge Structural Database (version 1.19, May 2017 updates) (Groom et al., 2016 ) revealed that there are a number of similar types of compounds where in place of the N,N-diallyl side chain, the side-chains substituents are di-n-propyl [CSD refodes BEHNOR (Jian et al., 1999a ), BEHNOR01 (Ivanov et al., 2005 )], di-isobutyl [LESVEK (Cox & Tiekink, 1999 ), LESVEK01 (Glinskaya et al., 1999 )] and di-isopropyl [SUVTUY (Jian et al., 1999b ), SUVTUY01 (Cox & Tiekink, 1999)].

5. Synthesis and crystallization

A solution of CdCl₂·2H₂O (0.55 g, 0.0025 mol) in ethanol (10 ml) was added to a solution of sodium N,N-diallyl dithiocarbamate (0.98 g, 0.005 mol) in ethanol (10 ml), and the resulting suspension was stirred for 45 min at room temperature. This solution was then filtered, and rinsed several times with distilled water (Onwudiwe et al., 2015 ) and ethanol. Yield: 1.28 g, 56%. Analysis found: C, 36.38; H, 4.40; N, 6.50; S, 28.42%. Calculated for C₁₄H₂₀N₂S₄Cd: C, 36.79; H, 4.41; N, 6.13; S, 28.06. Crystals suitable for single-crystal X-ray analysis were obtained by recrystallization from chloroform/ethanol. Other analytical data for this material (melting point, IR and NMR data) has been published previously (Onwudiwe et al., 2015).

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 4. All H atoms were positioned geometrically and refined isotropically using the riding-model approximation with C—H = 0.99 Å and U_iso(H) = 1.2 U_eq(C) for methylene groups and C—H = 0.95 Å and U_iso(H) = 1.2 U_eq(C) for all vinyl groups.

Table 4
Experimental details

Crystal data
Chemical formula	[Cd₂(C₇H₁₀NS₂)₄]
M_r	913.92
Crystal system, space group	Triclinic, P $[\overline{1}]$
Temperature (K)	200
a, b, c (Å)	8.0872 (2), 9.4146 (2), 13.0721 (3)
α, β, γ (°)	75.858 (1), 78.460 (1), 77.488 (1)
V (Å³)	930.75 (4)
Z	1
Radiation type	Mo Kα
μ (mm⁻¹)	1.62
Crystal size (mm)	0.60 × 0.44 × 0.17

Data collection
Diffractometer	Bruker APEXII CCD
Absorption correction	Numerical (SADABS; Bruker, 2011 )
T_min, T_max	0.824, 1.000
No. of measured, independent and observed [I > 2σ(I)] reflections	16101, 4644, 4391
R_int	0.015
(sin θ/λ)_max (Å⁻¹)	0.669

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.015, 0.037, 1.15
No. of reflections	4644
No. of parameters	191
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.28, −0.31
Computer programs: BIS and APEX2 (Bruker, 2011), SAINT (Bruker, 2009 ), SHELXS97 (Sheldrick, 2008 ), SHELXL2017 (Sheldrick, 2015 ), ORTEP-3 for Windows (Farrugia, 2012 ), PLATON (Spek, 2009 ) and Mercury (Macrae et al., 2008 ).

Supporting information

CCDC reference: 899314

Crystal structure: contains datablock I. DOI: https://doi.org/10.1107/S2056989017011616/zl2710sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989017011616/zl2710Isup2.hkl

Supporting information file. DOI: https://doi.org/10.1107/S2056989017011616/zl2710Isup3.mol

checkCIF report

Computing details top

Data collection: BIS (Bruker, 2011); cell refinement: APEX2 (Bruker, 2011); data reduction: SAINT (Bruker, 2009); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL2017 (Sheldrick, 2015); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2009) and Mercury (Macrae et al., 2008).

Bis(µ-N,N-diallyldithiocarbamato)bis[(N,N-diallyldithiocarbamato)cadmium] top

Crystal data top

[Cd₂(C₇H₁₀NS₂)₄]	Z = 1
M_r = 913.92	F(000) = 460
Triclinic, P1	D_x = 1.631 Mg m⁻³
a = 8.0872 (2) Å	Mo Kα radiation, λ = 0.71073 Å
b = 9.4146 (2) Å	Cell parameters from 9892 reflections
c = 13.0721 (3) Å	θ = 3.1–28.4°
α = 75.858 (1)°	µ = 1.62 mm⁻¹
β = 78.460 (1)°	T = 200 K
γ = 77.488 (1)°	Platelet, colourless
V = 930.75 (4) Å³	0.60 × 0.44 × 0.17 mm

Data collection top

Bruker APEXII CCD diffractometer	4644 independent reflections
Radiation source: sealed tube	4391 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.015
Detector resolution: 8.3333 pixels mm^-1	θ_max = 28.4°, θ_min = 2.5°
φ and ω scans	h = −10→10
Absorption correction: numerical (SADABS; Bruker, 2011)	k = −12→12
T_min = 0.824, T_max = 1.000	l = −16→17
16101 measured reflections

Refinement top

Refinement on F²	Hydrogen site location: inferred from neighbouring sites
Least-squares matrix: full	H-atom parameters constrained
R[F² > 2σ(F²)] = 0.015	w = 1/[σ²(F_o²) + (0.0111P)² + 0.3546P] where P = (F_o² + 2F_c²)/3
wR(F²) = 0.037	(Δ/σ)_max = 0.002
S = 1.15	Δρ_max = 0.28 e Å⁻³
4644 reflections	Δρ_min = −0.31 e Å⁻³
191 parameters	Extinction correction: SHELXL2017 (Sheldrick, 2015), Fc^*=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4
0 restraints	Extinction coefficient: 0.0173 (7)
Primary atom site location: dual

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.

Refinement. Carbon-bound H atoms were placed in calculated positions and were included in the refinement in the riding model approximation, with U(H) set to 1.2 U_eq(C).

Two reflections with large differences between their observed and calculated intensity were omitted. This is probably due to obstruction by the beam stop.

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

	x	y	z	U_iso*/U_eq
Cd1	0.89235 (2)	−0.00613 (2)	0.63560 (2)	0.02744 (4)
S11	0.78076 (5)	−0.22154 (4)	0.60114 (3)	0.03471 (8)
S12	0.78142 (4)	0.06086 (3)	0.43671 (3)	0.02551 (7)
S21	0.84065 (5)	−0.02186 (4)	0.84095 (3)	0.03026 (7)
S22	0.80123 (4)	0.25713 (4)	0.67413 (2)	0.02688 (7)
N1	0.66681 (14)	−0.17652 (12)	0.41751 (9)	0.0263 (2)
N2	0.76538 (14)	0.25083 (12)	0.88135 (8)	0.0252 (2)
C11	0.73731 (15)	−0.12060 (14)	0.47817 (10)	0.0234 (2)
C12	0.61897 (18)	−0.32572 (16)	0.45381 (11)	0.0323 (3)
H12A	0.522086	−0.328088	0.418787	0.039*
H12B	0.579076	−0.343192	0.531802	0.039*
C13	0.7621 (2)	−0.44839 (16)	0.43028 (13)	0.0402 (3)
H13	0.865773	−0.457570	0.456951	0.048*
C14	0.7529 (3)	−0.54414 (18)	0.37491 (16)	0.0535 (5)
H14A	0.650843	−0.537598	0.347257	0.064*
H14B	0.848334	−0.620204	0.362346	0.064*
C15	0.6278 (2)	−0.09675 (16)	0.31078 (11)	0.0342 (3)
H15A	0.641253	0.008254	0.299629	0.041*
H15B	0.506864	−0.097581	0.307348	0.041*
C16	0.74035 (18)	−0.16349 (18)	0.22396 (11)	0.0367 (3)
H16	0.860609	−0.180714	0.223617	0.044*
C17	0.6869 (2)	−0.2001 (2)	0.14846 (13)	0.0468 (4)
H17A	0.567516	−0.184585	0.146136	0.056*
H17B	0.767061	−0.242477	0.095478	0.056*
C21	0.79907 (15)	0.16963 (13)	0.80674 (10)	0.0221 (2)
C22	0.78373 (18)	0.18663 (15)	0.99407 (10)	0.0302 (3)
H22A	0.861484	0.238077	1.015705	0.036*
H22B	0.836930	0.080256	1.001404	0.036*
C23	0.6172 (2)	0.19957 (18)	1.06666 (12)	0.0420 (4)
H23	0.528018	0.158623	1.053323	0.050*
C24	0.5865 (3)	0.2647 (2)	1.14844 (14)	0.0635 (6)
H24A	0.673453	0.306597	1.163574	0.076*
H24B	0.477492	0.269906	1.192382	0.076*
C25	0.72097 (18)	0.41463 (14)	0.85522 (11)	0.0307 (3)
H25A	0.640375	0.449151	0.915541	0.037*
H25B	0.662323	0.445861	0.791634	0.037*
C26	0.8754 (2)	0.48598 (16)	0.83349 (13)	0.0407 (3)
H26	0.964495	0.461004	0.777955	0.049*
C27	0.8956 (3)	0.5809 (2)	0.88618 (19)	0.0629 (5)
H27A	0.808789	0.608066	0.942160	0.075*
H27B	0.997242	0.622596	0.868496	0.075*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Cd1	0.02830 (6)	0.03364 (6)	0.02419 (6)	−0.00931 (4)	−0.00001 (4)	−0.01311 (4)
S11	0.0509 (2)	0.03708 (18)	0.02178 (15)	−0.02237 (16)	−0.00800 (14)	−0.00194 (13)
S12	0.02576 (15)	0.02429 (14)	0.02685 (15)	−0.00332 (11)	−0.00321 (12)	−0.00771 (11)
S21	0.04427 (19)	0.02305 (14)	0.02257 (15)	−0.00670 (13)	−0.00156 (13)	−0.00538 (11)
S22	0.03366 (16)	0.02749 (15)	0.02034 (14)	−0.00547 (12)	−0.00683 (12)	−0.00441 (11)
N1	0.0255 (5)	0.0302 (5)	0.0262 (5)	−0.0061 (4)	−0.0051 (4)	−0.0093 (4)
N2	0.0296 (5)	0.0239 (5)	0.0214 (5)	0.0007 (4)	−0.0052 (4)	−0.0070 (4)
C11	0.0198 (5)	0.0288 (6)	0.0225 (5)	−0.0051 (4)	0.0005 (4)	−0.0093 (5)
C12	0.0311 (7)	0.0389 (7)	0.0328 (7)	−0.0180 (6)	−0.0036 (5)	−0.0096 (6)
C13	0.0388 (8)	0.0292 (7)	0.0493 (9)	−0.0108 (6)	−0.0098 (7)	0.0045 (6)
C14	0.0623 (11)	0.0312 (8)	0.0604 (11)	−0.0166 (7)	0.0138 (9)	−0.0086 (7)
C15	0.0404 (8)	0.0328 (7)	0.0330 (7)	0.0007 (6)	−0.0179 (6)	−0.0098 (6)
C16	0.0267 (6)	0.0527 (9)	0.0279 (7)	−0.0097 (6)	−0.0037 (5)	−0.0010 (6)
C17	0.0537 (10)	0.0539 (10)	0.0336 (8)	−0.0058 (8)	−0.0040 (7)	−0.0163 (7)
C21	0.0188 (5)	0.0252 (6)	0.0227 (5)	−0.0039 (4)	−0.0028 (4)	−0.0064 (4)
C22	0.0365 (7)	0.0318 (6)	0.0212 (6)	0.0017 (5)	−0.0062 (5)	−0.0089 (5)
C23	0.0427 (8)	0.0414 (8)	0.0309 (7)	−0.0007 (7)	0.0002 (6)	0.0023 (6)
C24	0.0823 (14)	0.0469 (10)	0.0345 (9)	0.0170 (10)	0.0156 (9)	−0.0033 (7)
C25	0.0376 (7)	0.0243 (6)	0.0286 (6)	0.0035 (5)	−0.0072 (5)	−0.0091 (5)
C26	0.0487 (9)	0.0285 (7)	0.0445 (9)	−0.0070 (6)	−0.0074 (7)	−0.0067 (6)
C27	0.0769 (14)	0.0452 (10)	0.0796 (14)	−0.0149 (9)	−0.0308 (12)	−0.0187 (10)

Geometric parameters (Å, º) top

Cd1—S11	2.5558 (3)	C15—C16	1.483 (2)
Cd1—S22	2.5709 (3)	C15—H15A	0.9900
Cd1—S12ⁱ	2.6021 (3)	C15—H15B	0.9900
Cd1—S21	2.6050 (3)	C16—C17	1.297 (2)
Cd1—S12	2.8016 (3)	C16—H16	0.9500
S11—C11	1.7162 (13)	C17—H17A	0.9500
S12—C11	1.7532 (13)	C17—H17B	0.9500
S21—C21	1.7224 (12)	C22—C23	1.484 (2)
S22—C21	1.7263 (12)	C22—H22A	0.9900
N1—C11	1.3213 (16)	C22—H22B	0.9900
N1—C15	1.4735 (17)	C23—C24	1.315 (3)
N1—C12	1.4779 (17)	C23—H23	0.9500
N2—C21	1.3333 (15)	C24—H24A	0.9500
N2—C22	1.4738 (16)	C24—H24B	0.9500
N2—C25	1.4749 (16)	C25—C26	1.490 (2)
C12—C13	1.490 (2)	C25—H25A	0.9900
C12—H12A	0.9900	C25—H25B	0.9900
C12—H12B	0.9900	C26—C27	1.307 (2)
C13—C14	1.308 (2)	C26—H26	0.9500
C13—H13	0.9500	C27—H27A	0.9500
C14—H14A	0.9500	C27—H27B	0.9500
C14—H14B	0.9500

S11—Cd1—S22	143.705 (13)	N1—C15—H15A	109.1
S11—Cd1—S12ⁱ	103.129 (12)	C16—C15—H15A	109.1
S22—Cd1—S12ⁱ	111.289 (11)	N1—C15—H15B	109.1
S11—Cd1—S21	108.203 (11)	C16—C15—H15B	109.1
S22—Cd1—S21	70.264 (10)	H15A—C15—H15B	107.8
S12ⁱ—Cd1—S21	110.826 (11)	C17—C16—C15	124.89 (14)
S11—Cd1—S12	67.486 (10)	C17—C16—H16	117.6
S22—Cd1—S12	96.950 (10)	C15—C16—H16	117.6
S12ⁱ—Cd1—S12	96.257 (9)	C16—C17—H17A	120.0
S21—Cd1—S12	152.651 (11)	C16—C17—H17B	120.0
C11—S11—Cd1	91.26 (4)	H17A—C17—H17B	120.0
C11—S12—Cd1ⁱ	100.48 (4)	N2—C21—S21	120.81 (9)
C11—S12—Cd1	82.68 (4)	N2—C21—S22	119.72 (9)
Cd1ⁱ—S12—Cd1	83.743 (9)	S21—C21—S22	119.47 (7)
C21—S21—Cd1	84.58 (4)	N2—C22—C23	112.57 (11)
C21—S22—Cd1	85.57 (4)	N2—C22—H22A	109.1
C11—N1—C15	123.59 (11)	C23—C22—H22A	109.1
C11—N1—C12	121.48 (11)	N2—C22—H22B	109.1
C15—N1—C12	114.93 (11)	C23—C22—H22B	109.1
C21—N2—C22	123.16 (10)	H22A—C22—H22B	107.8
C21—N2—C25	122.11 (11)	C24—C23—C22	123.46 (19)
C22—N2—C25	114.53 (10)	C24—C23—H23	118.3
N1—C11—S11	120.74 (10)	C22—C23—H23	118.3
N1—C11—S12	120.64 (10)	C23—C24—H24A	120.0
S11—C11—S12	118.58 (7)	C23—C24—H24B	120.0
N1—C12—C13	113.50 (11)	H24A—C24—H24B	120.0
N1—C12—H12A	108.9	N2—C25—C26	111.95 (11)
C13—C12—H12A	108.9	N2—C25—H25A	109.2
N1—C12—H12B	108.9	C26—C25—H25A	109.2
C13—C12—H12B	108.9	N2—C25—H25B	109.2
H12A—C12—H12B	107.7	C26—C25—H25B	109.2
C14—C13—C12	123.61 (16)	H25A—C25—H25B	107.9
C14—C13—H13	118.2	C27—C26—C25	123.99 (18)
C12—C13—H13	118.2	C27—C26—H26	118.0
C13—C14—H14A	120.0	C25—C26—H26	118.0
C13—C14—H14B	120.0	C26—C27—H27A	120.0
H14A—C14—H14B	120.0	C26—C27—H27B	120.0
N1—C15—C16	112.59 (12)	H27A—C27—H27B	120.0

C15—N1—C11—S11	−179.31 (10)	N1—C15—C16—C17	128.82 (17)
C12—N1—C11—S11	1.48 (17)	C22—N2—C21—S21	8.51 (17)
C15—N1—C11—S12	2.97 (17)	C25—N2—C21—S21	−176.94 (10)
C12—N1—C11—S12	−176.24 (9)	C22—N2—C21—S22	−171.47 (10)
Cd1—S11—C11—N1	−178.09 (10)	C25—N2—C21—S22	3.08 (17)
Cd1—S11—C11—S12	−0.33 (7)	Cd1—S21—C21—N2	−176.69 (10)
Cd1ⁱ—S12—C11—N1	−99.72 (10)	Cd1—S21—C21—S22	3.29 (6)
Cd1—S12—C11—N1	178.07 (10)	Cd1—S22—C21—N2	176.65 (10)
Cd1ⁱ—S12—C11—S11	82.51 (7)	Cd1—S22—C21—S21	−3.33 (7)
Cd1—S12—C11—S11	0.30 (6)	C21—N2—C22—C23	−114.38 (14)
C11—N1—C12—C13	−86.54 (16)	C25—N2—C22—C23	70.69 (16)
C15—N1—C12—C13	94.18 (15)	N2—C22—C23—C24	−123.84 (16)
N1—C12—C13—C14	−123.54 (16)	C21—N2—C25—C26	−91.28 (15)
C11—N1—C15—C16	110.28 (15)	C22—N2—C25—C26	83.71 (15)
C12—N1—C15—C16	−70.47 (16)	N2—C25—C26—C27	−122.19 (18)

Symmetry code: (i) −x+2, −y, −z+1.

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
C12—H12B···S11	0.99	2.59	2.9783 (14)	103
C15—H15A···S12	0.99	2.50	3.0438 (14)	115
C22—H22B···S21	0.99	2.50	3.0381 (13)	114
C25—H25B···S22	0.99	2.56	2.9845 (14)	106

X—H···π interactions top

Cg3 is the centroid of the Cd1—S11—C11—S12—Cd1ⁱ—S12ⁱ ring.

C—H···Cg	C—H	H···Cg	C···Cg	C—H···Cg
C15—H15B···Cg3	0.99	2.94	3.9209 (17)	171
C16—H16···Cg3	0.99	2.90	3.7648 (17)	152

Symmetry code: (i) -x + 2, -y, -z + 1.

Acknowledgements

The authors wish to acknowledge their respective institutions for their facilities to carry out the synthesis and characterization of the title compound.

Funding information

Funding for this research was provided by: North-West University, South Africa.

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