Synthesis and crystal structure of bis­(1H-benzo[d][1,2,3]triazole-κN2){2,2′-[N-(phenyl­phospho­r­yl­methyl-κO)aza­nedi­yl]di­acetato-κ3O,N,O′}cobalt(II)–1H-benzo[d][1,2,3]triazole (1/1)

Du, C.-J.; Zhao, X.-N.

doi:10.1107/S2056989017015079

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ISSN: 2056-9890

Volume 73| Part 11| November 2017| Pages 1704-1707

https://doi.org/10.1107/S2056989017015079

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Synthesis and crystal structure of bis(1H-benzo[d][1,2,3]triazole-κN²){2,2′-[N-(phenylphosphorylmethyl-κO)azanediyl]diacetato-κ³O,N,O′}cobalt(II)–1H-benzo[d][1,2,3]triazole (1/1)

Chao-Jun Du ^a ^* and Xiao-Na Zhao ^a

^aSchool of Biochemical and Chemical Engineering, Nanyang Institute of Technology, Nanyang 473000, People's Republic of China
^*Correspondence e-mail: hyperchem@126.com

Edited by D.-J. Xu, Zhejiang University (Yuquan Campus), China (Received 9 September 2017; accepted 16 October 2017; online 20 October 2017)

In the title compound, [Co(C₁₁H₁₂NO₆P)(C₆H₅N₃)₂]·C₆H₅N₃, the 2,2′-[N-(phenylphosphorylmethyl-κO)azanediyl]diacetate dianion N,O,O′,O′′-chelates the Co^II cation and two 1H-benzo[d][1,2,3]triazole molecules coordinate to the Co^II cation to complete the slightly distorted octahedral coordination. In the crystal, classical O—H⋯O, N—H⋯O hydrogen bonds and weak C—H⋯N hydrogen bonds link the molecules into a three-dimensional supramolecular architecture. π–π stacking between the triazole and benzene rings and between the benzene rings is also observed in the crystal.

Keywords: crystal structure; Co^II complex; aminophosphonate; organophosphorus materials; flame retardants.

CCDC reference: 1573300

1. Chemical context

Over the past few decades, many researchers have focused their attention on the preparation of organophosphorus materials because of their biological activities (Miller et al., 2008 ; Leonova et al., 2010 ; Sharma & Clearfield, 2000 ). In particular, aminophosphinic acid ligands as phosphorus analogues of natural amino acids have attracted significant attention because of their strong coordination ability with metals. It has been shown that aminophosphinic acid derivatives can be used as potent and selective inhibitors of many proteolytic enzymes, especially metalloproteases (Latajka et al., 2008 ; Cates & Li, 1985 ; Katoh et al., 1996 ). For the design and preparation of extraordinary enzyme inhibitors with considerable pharmacological activity and low toxicity, it is necessary to understand the metal-binding properties in order to obtain a profound insight into the mechanism of their biological activity.

In addition to their biological activities, aminophosphinic acids are also attracting interest in many areas such as the construction industry, aerospace and electronics for their excellent flame retardancy to polymeric materials (Lin, 2004 ; Lin et al., 2010 ; Lu & Hamerton, 2002 ). Aminophosphinic acid reactive flame retardants also have the advantage of low evolution of toxic gases and smoke in the event of fire, but cannot be used to make polyesters flame retardant because their decomposed temperatures do not match those of the polymers. In the early 80s, many metal salts of dialkylphosphinates were used by Pennwalt to increase the fire safety of polyesters (Sandler, 1979 , 1980 ). Later, researchers from the Clariant company researched in detail the variety of dialkylphosphinates aluminum salts in glass-filled nylons (Kleiner et al., 1998 , 1999 ; Weferling et al., 2001 ). They found that the aluminum diethylphosphinate can give a V-0 rating at 15 wt% in plain PBT and commercialized it as Exolit OP 930 (DEPAL), which is also used in thermoset resins (Horold et al., 2002 ; Campbell et al., 2005 ). Unfortunately, aluminum diethylphosphinate was prepared at high temperature and pressure. The coordination complexes of aminophosphinic acids and metals that are easily obtained at normal temperature have the elements phosphorus, nitrogen and the metal coexisting in the molecular structure, which may give a significant improvement of flame-retardant efficiency for polyesters. We therefore decided to explore new coordination complexes of aminophosphinic acids and metals as halogen-free flame retardants and as excellent candidates to replace the aluminum diethylphosphinate flame retardant. To the best of our knowledge, neither the title ligand 2,2′-({[(phenyl)phosphoryl]methyl}azanediyl)diacetic acid (synthesized by a typical Mannich reaction) nor any complexes based on this ligand have been reported anywhere. We therefore report herein the synthesis and crystal structure of a cobalt(II) complex of this ligand, [Co(C₁₁H₁₂NO₆P)(C₆H₅N₃)₂]·C₆H₅N₃. Research of its potential applications (especially for use as a flame retardant) of this and analogous complexes is currently being undertaken.

2. Structural commentary

The molecular structure of the title complex is shown in Fig. 1. The Co^II cation is N,O,O′,O"-chelated by a 2,2′-({[(phenyl)phosphoryl]methyl}azanediyl)diacetate dianion and coordinates two 1H-benzo[d][1,2,3]triazole molecules in a slightly distorted octahedral coordination (Table 1). The 2,2′-({[(phenyl)phosphoryl]methyl}azanediyl)diacetate dianion forms three five-membered chelate rings. The N atom comes from the imino group, the two O atoms from carboxyl groups and another O atom from the organophosphorus group.

Table 1
Selected bond lengths (Å)

Co1—N1	2.2350 (17)	Co1—O2	2.0320 (15)
Co1—N4	2.0742 (15)	Co1—O3	2.1602 (14)
Co1—N10	2.2274 (15)	Co1—O6	2.0399 (14)

Figure 1
The molecular structure of the title compound.

3. Supramolecular features

In the crystal, the complex molecules are linked by N—H⋯O hydrogen bonds involving the 1H-benzo[d][1,2,3]triazole molecules and O—H⋯O bonds involving the aminophosphonate groups into a three-dimensional supramolecular architecture (Fig. 2, Table 2). π–π stacking between organophosphorus aromatic rings is also observed, the centroid-to-centroid distances being 3.8622 (16), 3.7961 (16) 3.7331 (18) and 3.5001 (17) Å.

Table 2
Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O4—H4⋯O5ⁱ	0.82	1.70	2.507 (2)	168
N3—H3⋯O1ⁱⁱ	0.86	1.80	2.651 (2)	169
N6—H6⋯O1ⁱⁱⁱ	0.86	2.44	3.173 (2)	144
N6—H6⋯O2ⁱⁱⁱ	0.86	2.24	3.012 (2)	149
N9—H9⋯O5^iv	0.86	1.94	2.743 (3)	156
C3—H3A⋯N7^v	0.93	2.62	3.440 (5)	147
C26—H26⋯N2^vi	0.93	2.53	3.251 (4)	134
Symmetry codes: (i) -x, -y, -z+2; (ii) x+1, y, z; (iii) -x, -y+1, -z+2; (iv) -x, -y, -z+1; (v) -x+1, -y, -z+1; (vi) -x, -y+1, -z+1.

Figure 2
View in the bc plane of the crystal packing showing hydrogen bonds as green dotted lines.

4. Database survey

Aminophosphonates acting as ligands have been widely used in coordination chemistry. Over the past two decades, many studies have been reported that use alkylamino-N,N-bis methylenephosphonates to coordinate with main group metals such as Ca, Ba (Vivani et al., 2006 ), transition metals such as Cd, Mn, Zn, and Pb (Taddei et al., 2011 ) and lanthanide metals (Mao et al., 2002 ) to obtain large numbers of zero-, one- two- and three-dimensional structures. However, the use of 2,2′-({[(phenyl)phosphoryl]methyl}azanediyl)diacetic acid as a ligand has not been reported elsewhere. The ligand has three functional groups, carboxyl, imino and organophosphate, and all of them are affected by pH values in solution. One of the key factors for the ligand used is to adjust the acidity of the reaction solution. Exploiting more analogous ligands and their complexes and developing their potential applications remains a big challenge.

5. Synthesis and crystallization

Phenylphosphinic acid (1.42 g, 0.01 mol) and iminodiacetic acid (41.33 g, 0.01 mol) were dissolved in hydrochloric acid (6 M, 50 ml) and refluxed for 1 h under a nitrogen atmosphere. 50 ml of formaldehyde in hydrochloric acid (37%) was added dropwise under vigorous stirring, and the temperature was maintained at 378–383 K for 4 h. This solution was then concentrated under reduced pressure and allowed to cool to room temperature. 100 ml of acetone was added, and the white precipitate of 2,2′-({[(phenyl)phosphoryl]methyl}azanediyl)diacetic acid was collected by filtration. Colourless crystals of the title compound were obtained as follows: 2.38 g CoCl₂·6H₂O (0.01 mol) and 3.57 g 1H-benzo[d][1,2,3]triazole (0.03 mol) were added to a stirred hydrochloric acid solution (4 M, 40 ml), then 3.24 g of 2,2′-({[(phenyl)phosphoryl]methyl}azanediyl)diacetic acid (0.01 mol) were added in one portion. The mixture was stirred for 1 h, then filtered and left undisturbed. Single crystals were obtained by slow evaporation of the reaction mixture after several days.

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 3. Water H atoms were located in difference-Fourier maps and O—H distances were restrained to 0.82 Å. Other H atoms (CH and CH₂ groups) were positioned geometrically and refined using a riding model with U_iso(H) = 1.2U_eq(C). The carboxyl H atom was refined as rotating group with U_iso(H) = 1.5U_eq(O).

Table 3
Experimental details

Crystal data
Chemical formula	[Co(C₁₁H₁₂NO₆P)(C₆H₅N₃)₂]·C₆H₅N₃
M_r	701.50
Crystal system, space group	Triclinic, P $[\overline{1}]$
Temperature (K)	293
a, b, c (Å)	7.5701 (3), 14.1261 (4), 14.9018 (5)
α, β, γ (°)	97.351 (3), 102.335 (3), 91.206 (3)
V (Å³)	1542.03 (9)
Z	2
Radiation type	Mo Kα
μ (mm⁻¹)	0.67
Crystal size (mm)	0.30 × 0.25 × 0.20

Data collection
Diffractometer	Agilent Xcalibur Atlas Gemini ultra
Absorption correction	Multi-scan (CrysAlis PRO; Agilent, 2011 )
T_min, T_max	0.905, 1.000
No. of measured, independent and observed [I > 2σ(I)] reflections	14339, 6722, 5440
R_int	0.032
(sin θ/λ)_max (Å⁻¹)	0.641

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.038, 0.097, 1.02
No. of reflections	6722
No. of parameters	425
No. of restraints	121
H-atom treatment	H-atom parameters constrained
Δρ_max, Δρ_min (e Å⁻³)	0.42, −0.26
Computer programs: CrysAlis PRO (Agilent, 2011), SHELXT (Sheldrick, 2015a ), SHELXL2016 (Sheldrick, 2015b ) and OLEX2 (Dolomanov et al., 2009 ).

Supporting information

CCDC reference: 1573300

Crystal structure: contains datablocks global, I. DOI: https://doi.org/10.1107/S2056989017015079/xu5906sup1.cif

Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S2056989017015079/xu5906Isup3.hkl

checkCIF report

Computing details top

Data collection: CrysAlis PRO (Agilent, 2011); cell refinement: CrysAlis PRO (Agilent, 2011); data reduction: CrysAlis PRO (Agilent, 2011); program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL2016 (Sheldrick, 2015b); molecular graphics: OLEX2 (Dolomanov et al., 2009); software used to prepare material for publication: OLEX2 (Dolomanov et al., 2009).

Bis(1H-benzo[d][1,2,3]triazole-κN²){2,2'-[N-(phenylphosphorylmethyl-κO)azanediyl]diacetato-κ³O,N,O'}cobalt(II)–1H-benzo[d][1,2,3]triazole (1/1) top

Crystal data top

[Co(C₁₁H₁₂NO₆P)(C₆H₅N₃)₂]·C₆H₅N₃	Z = 2
M_r = 701.50	F(000) = 722
Triclinic, P1	D_x = 1.511 Mg m⁻³
a = 7.5701 (3) Å	Mo Kα radiation, λ = 0.71073 Å
b = 14.1261 (4) Å	Cell parameters from 7159 reflections
c = 14.9018 (5) Å	θ = 2.8–29.4°
α = 97.351 (3)°	µ = 0.67 mm⁻¹
β = 102.335 (3)°	T = 293 K
γ = 91.206 (3)°	Block, colourless
V = 1542.03 (9) Å³	0.30 × 0.25 × 0.20 mm

Data collection top

Agilent Xcalibur Atlas Gemini ultra diffractometer	6722 independent reflections
Radiation source: Enhance (Mo) X-ray Source	5440 reflections with I > 2σ(I)
Graphite monochromator	R_int = 0.032
Detector resolution: 10.4170 pixels mm^-1	θ_max = 27.1°, θ_min = 2.8°
ω scans	h = −8→9
Absorption correction: multi-scan (CrysAlis Pro; Agilent, 2011)	k = −18→18
T_min = 0.905, T_max = 1.000	l = −19→18
14339 measured reflections

Refinement top

Refinement on F²	Primary atom site location: dual
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F² > 2σ(F²)] = 0.038	H-atom parameters constrained
wR(F²) = 0.097	w = 1/[σ²(F_o²) + (0.042P)² + 0.4782P] where P = (F_o² + 2F_c²)/3
S = 1.02	(Δ/σ)_max = 0.001
6722 reflections	Δρ_max = 0.42 e Å⁻³
425 parameters	Δρ_min = −0.26 e Å⁻³
121 restraints

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
Co1	−0.05582 (3)	0.24613 (2)	0.88580 (2)	0.03100 (9)
P1	0.00092 (7)	0.05593 (3)	0.77757 (4)	0.03346 (13)
O1	−0.5457 (2)	0.36152 (11)	0.84311 (12)	0.0487 (4)
O2	−0.26323 (19)	0.33099 (10)	0.90211 (10)	0.0390 (3)
O3	−0.07905 (19)	0.16185 (10)	0.99428 (10)	0.0385 (3)
O4	−0.2239 (2)	0.03247 (11)	1.02198 (11)	0.0482 (4)
H4	−0.145757	0.039665	1.070122	0.072*
O5	0.0013 (2)	−0.03141 (10)	0.82718 (11)	0.0477 (4)
O6	0.09929 (18)	0.14478 (9)	0.83555 (10)	0.0359 (3)
N1	−0.0358 (2)	0.31090 (12)	0.75891 (12)	0.0374 (4)
N2	−0.1649 (2)	0.30501 (13)	0.68392 (13)	0.0435 (4)
N3	0.1202 (2)	0.34112 (12)	0.74030 (13)	0.0426 (4)
H3	0.222267	0.350335	0.779575	0.051*
N4	0.1601 (2)	0.33299 (11)	0.96562 (11)	0.0344 (4)
N5	0.1596 (3)	0.42687 (12)	0.97157 (12)	0.0421 (4)
N6	0.3092 (3)	0.46220 (13)	1.03207 (13)	0.0481 (5)
H6	0.338370	0.522214	1.046881	0.058*
N10	−0.2928 (2)	0.14824 (11)	0.81479 (11)	0.0316 (4)
C1	0.1002 (3)	0.02925 (15)	0.67820 (15)	0.0407 (5)
C2	0.1773 (4)	−0.0567 (2)	0.6597 (2)	0.0694 (8)
H2	0.168755	−0.105273	0.695437	0.083*
C3	0.2682 (5)	−0.0708 (3)	0.5871 (3)	0.0953 (12)
H3A	0.323420	−0.127941	0.575531	0.114*
C4	0.2756 (4)	0.0009 (3)	0.5325 (2)	0.0891 (11)
H4A	0.333480	−0.009027	0.483230	0.107*
C5	0.2002 (4)	0.0844 (3)	0.5499 (2)	0.0775 (9)
H5	0.207219	0.132418	0.513342	0.093*
C6	0.1125 (4)	0.09900 (19)	0.62221 (17)	0.0568 (6)
H6A	0.060220	0.157067	0.633634	0.068*
C7	−0.2342 (3)	0.08818 (13)	0.73759 (13)	0.0342 (4)
H7A	−0.242846	0.123287	0.685100	0.041*
H7B	−0.312610	0.030742	0.717894	0.041*
C8	−0.4400 (3)	0.21247 (14)	0.78471 (15)	0.0364 (5)
H8A	−0.555535	0.181491	0.784763	0.044*
H8B	−0.441006	0.223997	0.721824	0.044*
C9	−0.4163 (3)	0.30816 (14)	0.84836 (14)	0.0352 (4)
C10	−0.3395 (3)	0.08937 (15)	0.88264 (14)	0.0398 (5)
H10A	−0.355049	0.022944	0.854848	0.048*
H10B	−0.454127	0.108574	0.896454	0.048*
C11	−0.1990 (3)	0.09783 (14)	0.97153 (14)	0.0359 (4)
C12	−0.0903 (4)	0.33164 (15)	0.61468 (16)	0.0479 (6)
C13	−0.1688 (5)	0.3351 (2)	0.5210 (2)	0.0781 (9)
H13	−0.291141	0.319494	0.496573	0.094*
C14	−0.0567 (8)	0.3623 (3)	0.4679 (2)	0.1141 (15)
H14	−0.103623	0.365014	0.405342	0.137*
C15	0.1263 (8)	0.3864 (3)	0.5043 (3)	0.1173 (16)
H15	0.196461	0.405710	0.465057	0.141*
C16	0.2073 (5)	0.3829 (2)	0.5947 (3)	0.0865 (10)
H16	0.330116	0.398091	0.618044	0.104*
C17	0.0921 (4)	0.35481 (15)	0.65044 (17)	0.0486 (6)
C18	0.4099 (3)	0.39200 (17)	1.06754 (15)	0.0439 (5)
C19	0.5708 (3)	0.3909 (2)	1.13410 (17)	0.0602 (7)
H19	0.637276	0.446797	1.162961	0.072*
C20	0.6243 (3)	0.3031 (2)	1.15410 (19)	0.0672 (8)
H20	0.729652	0.299478	1.198757	0.081*
C21	0.5271 (3)	0.2173 (2)	1.11010 (18)	0.0575 (6)
H21	0.570254	0.159174	1.126133	0.069*
C22	0.3703 (3)	0.21803 (17)	1.04418 (16)	0.0448 (5)
H22	0.305819	0.161858	1.014559	0.054*
C23	0.3128 (3)	0.30737 (15)	1.02394 (14)	0.0360 (5)
N7	0.4354 (4)	0.24725 (17)	0.3610 (2)	0.0865 (9)
N8	0.3398 (4)	0.17053 (17)	0.3187 (2)	0.0874 (9)
N9	0.2049 (3)	0.19459 (15)	0.25306 (18)	0.0672 (6)
H9	0.125578	0.154709	0.216782	0.081*
C24	0.1059 (4)	0.3510 (2)	0.1986 (2)	0.0626 (7)
H24	0.006926	0.328408	0.151491	0.075*
C25	0.1578 (5)	0.4475 (2)	0.2201 (3)	0.0749 (9)
H25	0.090204	0.491257	0.187424	0.090*
C26	0.3083 (5)	0.4801 (2)	0.2892 (3)	0.0767 (9)
H26	0.339739	0.545220	0.300696	0.092*
C27	0.4112 (4)	0.4206 (2)	0.3407 (2)	0.0727 (8)
H27	0.511455	0.443467	0.387029	0.087*
C28	0.3593 (4)	0.32319 (18)	0.3209 (2)	0.0599 (7)
C29	0.2101 (3)	0.29056 (17)	0.25143 (19)	0.0518 (6)

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Co1	0.02873 (15)	0.02622 (14)	0.03550 (16)	−0.00256 (11)	0.00329 (11)	0.00159 (10)
P1	0.0386 (3)	0.0257 (2)	0.0332 (3)	0.0004 (2)	0.0023 (2)	0.0028 (2)
O1	0.0327 (8)	0.0417 (8)	0.0708 (11)	0.0047 (7)	0.0110 (7)	0.0048 (8)
O2	0.0314 (7)	0.0325 (7)	0.0490 (9)	−0.0011 (6)	0.0058 (6)	−0.0040 (6)
O3	0.0383 (8)	0.0373 (7)	0.0375 (8)	−0.0059 (7)	0.0032 (6)	0.0065 (6)
O4	0.0542 (10)	0.0431 (8)	0.0457 (9)	−0.0082 (8)	0.0020 (7)	0.0169 (7)
O5	0.0572 (10)	0.0328 (8)	0.0483 (9)	−0.0044 (7)	−0.0027 (7)	0.0121 (7)
O6	0.0342 (7)	0.0310 (7)	0.0401 (8)	0.0000 (6)	0.0062 (6)	−0.0007 (6)
N1	0.0343 (9)	0.0331 (9)	0.0456 (10)	0.0023 (8)	0.0066 (8)	0.0112 (7)
N2	0.0395 (10)	0.0384 (9)	0.0497 (11)	−0.0001 (8)	0.0006 (8)	0.0109 (8)
N3	0.0363 (10)	0.0382 (9)	0.0521 (11)	−0.0049 (8)	0.0073 (8)	0.0066 (8)
N4	0.0342 (9)	0.0272 (8)	0.0400 (9)	−0.0047 (7)	0.0072 (7)	0.0004 (7)
N5	0.0500 (11)	0.0310 (9)	0.0429 (10)	−0.0093 (8)	0.0095 (8)	−0.0011 (7)
N6	0.0599 (12)	0.0349 (10)	0.0453 (11)	−0.0215 (9)	0.0099 (9)	−0.0035 (8)
N10	0.0315 (9)	0.0291 (8)	0.0316 (8)	−0.0023 (7)	0.0024 (7)	0.0031 (6)
C1	0.0389 (12)	0.0399 (11)	0.0380 (12)	0.0033 (10)	0.0028 (9)	−0.0054 (9)
C2	0.0746 (19)	0.0618 (17)	0.0636 (18)	0.0280 (15)	0.0042 (14)	−0.0077 (13)
C3	0.078 (2)	0.114 (3)	0.082 (2)	0.049 (2)	0.0116 (18)	−0.030 (2)
C4	0.0503 (17)	0.149 (3)	0.059 (2)	−0.001 (2)	0.0168 (15)	−0.026 (2)
C5	0.074 (2)	0.104 (2)	0.0548 (17)	−0.0217 (19)	0.0271 (15)	−0.0042 (16)
C6	0.0680 (17)	0.0545 (14)	0.0505 (14)	0.0003 (13)	0.0209 (12)	0.0034 (11)
C7	0.0377 (11)	0.0277 (9)	0.0337 (10)	−0.0039 (8)	0.0027 (8)	0.0006 (8)
C8	0.0287 (10)	0.0353 (10)	0.0418 (11)	−0.0030 (9)	0.0015 (8)	0.0043 (9)
C9	0.0327 (11)	0.0338 (10)	0.0409 (11)	−0.0028 (9)	0.0109 (9)	0.0073 (9)
C10	0.0393 (12)	0.0379 (11)	0.0409 (12)	−0.0093 (9)	0.0071 (9)	0.0056 (9)
C11	0.0397 (11)	0.0310 (10)	0.0380 (11)	0.0020 (9)	0.0102 (9)	0.0052 (8)
C12	0.0632 (15)	0.0338 (11)	0.0459 (13)	0.0003 (11)	0.0074 (11)	0.0100 (10)
C13	0.114 (3)	0.0591 (17)	0.0522 (16)	−0.0011 (18)	−0.0044 (16)	0.0136 (13)
C14	0.207 (5)	0.086 (3)	0.051 (2)	−0.012 (3)	0.029 (2)	0.0192 (18)
C15	0.191 (5)	0.097 (3)	0.090 (3)	−0.013 (3)	0.085 (3)	0.024 (2)
C16	0.107 (3)	0.072 (2)	0.096 (2)	−0.0171 (19)	0.059 (2)	0.0131 (18)
C17	0.0624 (15)	0.0345 (11)	0.0542 (14)	−0.0015 (11)	0.0227 (12)	0.0093 (10)
C18	0.0390 (12)	0.0523 (13)	0.0384 (12)	−0.0177 (11)	0.0104 (9)	−0.0015 (10)
C19	0.0446 (14)	0.0790 (18)	0.0490 (14)	−0.0255 (14)	0.0005 (11)	0.0001 (13)
C20	0.0337 (13)	0.108 (2)	0.0543 (16)	−0.0042 (15)	−0.0009 (11)	0.0083 (16)
C21	0.0448 (14)	0.0717 (17)	0.0573 (16)	0.0143 (13)	0.0110 (12)	0.0123 (13)
C22	0.0384 (12)	0.0482 (13)	0.0468 (13)	0.0023 (10)	0.0093 (10)	0.0027 (10)
C23	0.0325 (10)	0.0402 (11)	0.0336 (11)	−0.0068 (9)	0.0078 (8)	−0.0009 (8)
N7	0.0813 (18)	0.0538 (14)	0.109 (2)	−0.0115 (13)	−0.0140 (15)	0.0136 (14)
N8	0.0901 (19)	0.0463 (13)	0.113 (2)	−0.0089 (13)	−0.0093 (16)	0.0186 (13)
N9	0.0651 (14)	0.0432 (11)	0.0872 (16)	−0.0120 (11)	0.0050 (13)	0.0087 (11)
C24	0.0531 (15)	0.0686 (17)	0.0759 (18)	0.0093 (13)	0.0313 (13)	0.0163 (14)
C25	0.078 (2)	0.0608 (16)	0.107 (2)	0.0278 (15)	0.0513 (18)	0.0305 (16)
C26	0.081 (2)	0.0429 (14)	0.118 (2)	0.0052 (15)	0.0486 (19)	0.0099 (15)
C27	0.0689 (18)	0.0461 (14)	0.103 (2)	−0.0099 (14)	0.0268 (16)	0.0001 (14)
C28	0.0584 (15)	0.0408 (13)	0.0812 (18)	−0.0044 (12)	0.0181 (14)	0.0063 (12)
C29	0.0498 (14)	0.0404 (12)	0.0703 (16)	−0.0025 (11)	0.0243 (12)	0.0080 (11)

Geometric parameters (Å, º) top

Co1—N1	2.2350 (17)	C8—H8A	0.9700
Co1—N4	2.0742 (15)	C8—H8B	0.9700
Co1—N10	2.2274 (15)	C8—C9	1.532 (3)
Co1—O2	2.0320 (15)	C10—H10A	0.9700
Co1—O3	2.1602 (14)	C10—H10B	0.9700
Co1—O6	2.0399 (14)	C10—C11	1.501 (3)
P1—O5	1.5171 (15)	C12—C13	1.403 (4)
P1—O6	1.5115 (13)	C12—C17	1.385 (3)
P1—C1	1.801 (2)	C13—H13	0.9300
P1—C7	1.839 (2)	C13—C14	1.359 (6)
O1—C9	1.244 (2)	C14—H14	0.9300
O2—C9	1.269 (2)	C14—C15	1.393 (6)
O3—C11	1.230 (2)	C15—H15	0.9300
O4—H4	0.8200	C15—C16	1.364 (6)
O4—C11	1.298 (2)	C16—H16	0.9300
N1—N2	1.310 (2)	C16—C17	1.410 (4)
N1—N3	1.343 (2)	C18—C19	1.399 (3)
N2—C12	1.366 (3)	C18—C23	1.397 (3)
N3—H3	0.8600	C19—H19	0.9300
N3—C17	1.350 (3)	C19—C20	1.363 (4)
N4—N5	1.318 (2)	C20—H20	0.9300
N4—C23	1.375 (3)	C20—C21	1.412 (4)
N5—N6	1.330 (3)	C21—H21	0.9300
N6—H6	0.8600	C21—C22	1.371 (3)
N6—C18	1.356 (3)	C22—H22	0.9300
N10—C7	1.491 (3)	C22—C23	1.392 (3)
N10—C8	1.483 (3)	N7—N8	1.301 (3)
N10—C10	1.481 (2)	N7—C28	1.372 (4)
C1—C2	1.381 (3)	N8—N9	1.337 (3)
C1—C6	1.384 (3)	N9—H9	0.8600
C2—H2	0.9300	N9—C29	1.359 (3)
C2—C3	1.396 (5)	C24—H24	0.9300
C3—H3A	0.9300	C24—C25	1.388 (4)
C3—C4	1.385 (5)	C24—C29	1.380 (4)
C4—H4A	0.9300	C25—H25	0.9300
C4—C5	1.341 (5)	C25—C26	1.388 (5)
C5—H5	0.9300	C26—H26	0.9300
C5—C6	1.378 (4)	C26—C27	1.356 (4)
C6—H6A	0.9300	C27—H27	0.9300
C7—H7A	0.9700	C27—C28	1.400 (4)
C7—H7B	0.9700	C28—C29	1.384 (4)

O2—Co1—O3	95.92 (6)	C9—C8—H8A	109.3
O2—Co1—O6	163.36 (6)	C9—C8—H8B	109.3
O2—Co1—N1	89.43 (6)	O1—C9—O2	122.73 (19)
O2—Co1—N4	99.74 (6)	O1—C9—C8	118.80 (18)
O2—Co1—N10	79.23 (6)	O2—C9—C8	118.43 (18)
O3—Co1—N1	170.82 (6)	N10—C10—H10A	108.9
O3—Co1—N10	79.15 (5)	N10—C10—H10B	108.9
O6—Co1—O3	89.22 (6)	N10—C10—C11	113.31 (16)
O6—Co1—N1	83.63 (6)	H10A—C10—H10B	107.7
O6—Co1—N4	95.57 (6)	C11—C10—H10A	108.9
O6—Co1—N10	86.25 (6)	C11—C10—H10B	108.9
N4—Co1—O3	94.76 (6)	O3—C11—O4	124.72 (19)
N4—Co1—N1	91.67 (6)	O3—C11—C10	123.09 (18)
N4—Co1—N10	173.64 (6)	O4—C11—C10	112.14 (17)
N10—Co1—N1	94.59 (6)	N2—C12—C13	130.2 (3)
O5—P1—C1	109.77 (10)	N2—C12—C17	108.4 (2)
O5—P1—C7	109.02 (9)	C17—C12—C13	121.4 (3)
O6—P1—O5	115.55 (8)	C12—C13—H13	121.8
O6—P1—C1	107.76 (9)	C14—C13—C12	116.4 (4)
O6—P1—C7	105.87 (8)	C14—C13—H13	121.8
C1—P1—C7	108.64 (10)	C13—C14—H14	119.0
C9—O2—Co1	117.27 (13)	C13—C14—C15	122.1 (3)
C11—O3—Co1	114.42 (13)	C15—C14—H14	119.0
C11—O4—H4	109.5	C14—C15—H15	118.5
P1—O6—Co1	116.94 (8)	C16—C15—C14	123.0 (3)
N2—N1—Co1	124.52 (13)	C16—C15—H15	118.5
N2—N1—N3	109.50 (17)	C15—C16—H16	122.3
N3—N1—Co1	124.31 (13)	C15—C16—C17	115.4 (4)
N1—N2—C12	107.56 (18)	C17—C16—H16	122.3
N1—N3—H3	125.3	N3—C17—C12	105.1 (2)
N1—N3—C17	109.50 (18)	N3—C17—C16	133.1 (3)
C17—N3—H3	125.3	C12—C17—C16	121.8 (3)
N5—N4—Co1	121.69 (14)	N6—C18—C19	134.2 (2)
N5—N4—C23	109.44 (16)	N6—C18—C23	104.45 (18)
C23—N4—Co1	128.68 (13)	C23—C18—C19	121.3 (2)
N4—N5—N6	107.51 (18)	C18—C19—H19	122.0
N5—N6—H6	124.2	C20—C19—C18	116.0 (2)
N5—N6—C18	111.69 (17)	C20—C19—H19	122.0
C18—N6—H6	124.2	C19—C20—H20	118.5
C7—N10—Co1	106.01 (11)	C19—C20—C21	123.0 (2)
C8—N10—Co1	104.74 (11)	C21—C20—H20	118.5
C8—N10—C7	114.68 (15)	C20—C21—H21	119.4
C10—N10—Co1	108.48 (11)	C22—C21—C20	121.2 (3)
C10—N10—C7	111.46 (15)	C22—C21—H21	119.4
C10—N10—C8	110.95 (16)	C21—C22—H22	121.8
C2—C1—P1	121.9 (2)	C21—C22—C23	116.5 (2)
C2—C1—C6	118.3 (3)	C23—C22—H22	121.8
C6—C1—P1	119.54 (18)	N4—C23—C18	106.90 (19)
C1—C2—H2	120.0	N4—C23—C22	130.98 (18)
C1—C2—C3	119.9 (3)	C22—C23—C18	122.1 (2)
C3—C2—H2	120.0	N8—N7—C28	107.3 (2)
C2—C3—H3A	120.2	N7—N8—N9	109.2 (2)
C4—C3—C2	119.6 (3)	N8—N9—H9	124.6
C4—C3—H3A	120.2	N8—N9—C29	110.9 (2)
C3—C4—H4A	119.6	C29—N9—H9	124.6
C5—C4—C3	120.8 (3)	C25—C24—H24	122.0
C5—C4—H4A	119.6	C29—C24—H24	122.0
C4—C5—H5	120.1	C29—C24—C25	116.0 (3)
C4—C5—C6	119.8 (3)	C24—C25—H25	119.3
C6—C5—H5	120.1	C24—C25—C26	121.5 (3)
C1—C6—H6A	119.2	C26—C25—H25	119.3
C5—C6—C1	121.6 (3)	C25—C26—H26	118.8
C5—C6—H6A	119.2	C27—C26—C25	122.5 (3)
P1—C7—H7A	109.8	C27—C26—H26	118.8
P1—C7—H7B	109.8	C26—C27—H27	121.6
N10—C7—P1	109.28 (12)	C26—C27—C28	116.8 (3)
N10—C7—H7A	109.8	C28—C27—H27	121.6
N10—C7—H7B	109.8	N7—C28—C27	129.9 (3)
H7A—C7—H7B	108.3	N7—C28—C29	109.4 (2)
N10—C8—H8A	109.3	C29—C28—C27	120.7 (3)
N10—C8—H8B	109.3	N9—C29—C24	134.3 (3)
N10—C8—C9	111.71 (16)	N9—C29—C28	103.2 (2)
H8A—C8—H8B	107.9	C24—C29—C28	122.5 (2)

Co1—O2—C9—O1	−169.65 (15)	C3—C4—C5—C6	−0.8 (5)
Co1—O2—C9—C8	7.9 (2)	C4—C5—C6—C1	0.2 (4)
Co1—O3—C11—O4	172.11 (17)	C6—C1—C2—C3	1.3 (4)
Co1—O3—C11—C10	−10.6 (3)	C7—P1—O6—Co1	19.78 (11)
Co1—N1—N2—C12	−165.41 (14)	C7—P1—C1—C2	−124.5 (2)
Co1—N1—N3—C17	165.45 (14)	C7—P1—C1—C6	60.4 (2)
Co1—N4—N5—N6	175.84 (13)	C7—N10—C8—C9	−143.90 (16)
Co1—N4—C23—C18	−175.15 (14)	C7—N10—C10—C11	105.60 (19)
Co1—N4—C23—C22	2.4 (3)	C8—N10—C7—P1	154.75 (13)
Co1—N10—C7—P1	39.72 (13)	C8—N10—C10—C11	−125.29 (18)
Co1—N10—C8—C9	−28.13 (18)	C10—N10—C7—P1	−78.13 (16)
Co1—N10—C10—C11	−10.8 (2)	C10—N10—C8—C9	88.72 (19)
P1—C1—C2—C3	−173.8 (2)	C12—C13—C14—C15	−0.5 (6)
P1—C1—C6—C5	174.7 (2)	C13—C12—C17—N3	−178.4 (2)
O5—P1—O6—Co1	−100.98 (11)	C13—C12—C17—C16	0.0 (4)
O5—P1—C1—C2	−5.4 (2)	C13—C14—C15—C16	1.2 (7)
O5—P1—C1—C6	179.53 (18)	C14—C15—C16—C17	−1.2 (6)
O5—P1—C7—N10	84.17 (14)	C15—C16—C17—N3	178.5 (3)
O6—P1—C1—C2	121.2 (2)	C15—C16—C17—C12	0.6 (5)
O6—P1—C1—C6	−53.9 (2)	C17—C12—C13—C14	−0.1 (4)
O6—P1—C7—N10	−40.74 (14)	C18—C19—C20—C21	1.0 (4)
N1—N2—C12—C13	178.0 (3)	C19—C18—C23—N4	177.9 (2)
N1—N2—C12—C17	−0.2 (3)	C19—C18—C23—C22	0.0 (3)
N1—N3—C17—C12	0.2 (2)	C19—C20—C21—C22	−0.4 (4)
N1—N3—C17—C16	−177.9 (3)	C20—C21—C22—C23	−0.4 (4)
N2—N1—N3—C17	−0.3 (2)	C21—C22—C23—N4	−176.7 (2)
N2—C12—C13—C14	−178.1 (3)	C21—C22—C23—C18	0.6 (3)
N2—C12—C17—N3	0.0 (3)	C23—N4—N5—N6	0.3 (2)
N2—C12—C17—C16	178.4 (2)	C23—C18—C19—C20	−0.8 (4)
N3—N1—N2—C12	0.3 (2)	N7—N8—N9—C29	−0.1 (4)
N4—N5—N6—C18	−0.5 (2)	N7—C28—C29—N9	−0.4 (3)
N5—N4—C23—C18	0.0 (2)	N7—C28—C29—C24	−179.9 (3)
N5—N4—C23—C22	177.6 (2)	N8—N7—C28—C27	−179.7 (3)
N5—N6—C18—C19	−177.3 (3)	N8—N7—C28—C29	0.4 (4)
N5—N6—C18—C23	0.5 (2)	N8—N9—C29—C24	179.7 (3)
N6—C18—C19—C20	176.7 (3)	N8—N9—C29—C28	0.3 (3)
N6—C18—C23—N4	−0.3 (2)	C24—C25—C26—C27	−1.2 (5)
N6—C18—C23—C22	−178.1 (2)	C25—C24—C29—N9	179.7 (3)
N10—C8—C9—O1	−166.14 (18)	C25—C24—C29—C28	−1.0 (4)
N10—C8—C9—O2	16.2 (3)	C25—C26—C27—C28	0.2 (5)
N10—C10—C11—O3	15.2 (3)	C26—C27—C28—N7	−179.7 (3)
N10—C10—C11—O4	−167.21 (18)	C26—C27—C28—C29	0.3 (5)
C1—P1—O6—Co1	135.88 (10)	C27—C28—C29—N9	179.6 (3)
C1—P1—C7—N10	−156.24 (12)	C27—C28—C29—C24	0.1 (4)
C1—C2—C3—C4	−1.9 (5)	C28—N7—N8—N9	−0.2 (4)
C2—C1—C6—C5	−0.5 (4)	C29—C24—C25—C26	1.5 (4)
C2—C3—C4—C5	1.6 (5)

Hydrogen-bond geometry (Å, º) top

D—H···A	D—H	H···A	D···A	D—H···A
O4—H4···O5ⁱ	0.82	1.70	2.507 (2)	168
N3—H3···O1ⁱⁱ	0.86	1.80	2.651 (2)	169
N6—H6···O1ⁱⁱⁱ	0.86	2.44	3.173 (2)	144
N6—H6···O2ⁱⁱⁱ	0.86	2.24	3.012 (2)	149
N9—H9···O5^iv	0.86	1.94	2.743 (3)	156
C3—H3A···N7^v	0.93	2.62	3.440 (5)	147
C26—H26···N2^vi	0.93	2.53	3.251 (4)	134

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

Funding information

Funding for this research was provided by the key research projects of Henan Province Higher Education (No. 17A430027).

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