A novel heptacoordinated cobalt(II) complex of 6,7-di­cyano­dipyridoquinoxaline (dcdpq): [Co(NO3)2(CH3CN)(dcdpq)]

Liu, H.; Du, M.; Ge, X.-J.; Bu, X.-H.; Yang, M.

doi:10.1107/S1600536801002422

A novel heptacoordinated cobalt(II) complex of 6,7-dicyanodipyridoquinoxaline (dcdpq): [Co(NO₃)₂(CH₃CN)(dcdpq)]

H. Liu, M. Du, X.-J. Ge, X.-H. Bu and M. Yang

The title complex, (acetonitrile)(6,7-dicyanodipyrido[3,2-f;2,3-h]quinoxine)dinitrocobalt(II), [Co(NO₃)₂(C₂H₃N)(C₁₆H₆N₆)], crystallizes in the monoclinic system with space group P2₁. The Co^II center is heptacoordinated by two N atoms of the pyridine moieties, four O atoms of two nitrate anions and one N atom of a CH₃CN molecule. The crystal structure reveals that the CoN₃O₄ coordination sphere has a distorted pentagonal-bipyramid geometry.

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Supporting information

	Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536801002422/om6006sup1.cif Contains datablocks global, I
	Structure factor file (CIF format) https://doi.org/10.1107/S1600536801002422/om6006Isup2.hkl Contains datablock I

CCDC reference: 159827

checkCIF report

Key indicators

Single-crystal X-ray study
T = 298 K
Mean (C-C) = 0.004 Å
R factor = 0.028
wR factor = 0.070
Data-to-parameter ratio = 11.1

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



PLAT_371  Alert C Long   C(sp2)-C(sp1) Bond  C(6)   -   C(15)  =       1.45 Ang.

PLAT_371  Alert C Long   C(sp2)-C(sp1) Bond  C(7)   -   C(16)  =       1.44 Ang.

General Notes



REFLT_03
         From the CIF: _diffrn_reflns_theta_max           26.40
         From the CIF: _reflns_number_total               3809
         Count of symmetry unique reflns         2143
         Completeness (_total/calc)            177.74%
         TEST3: Check Friedels for noncentro structure
         Estimate of Friedel pairs measured      1666
         Fraction of Friedel pairs measured     0.777
         Are heavy atom types Z>Si present          yes
          Please check that the estimate of the number of Friedel pairs is
          correct. If it is not, please give the correct count in the
          _publ_section_exptl_refinement section of the submitted CIF.


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 2 Alert Level C = Please check

Comment top

Polypyridyl ligands and their transition metal complexes have attracted great interest due to their potential as building blocks for supramolecular assemblies and ability to functionalize as optical sensor and probes for nucleic acid (Arkin et al., 1996; Holimin et al., 1999). In recent years, ligands derived from appropriate modification of dipyrido[2,3 - a:2',3'-c]phenazine (dppz) have been employed in order to suit those applications. However, most of the studies of this type of ligand have focused on metal centers such as Ru^II (Arounaguiri & Maiya, 1999), Os^II (Holmlin & Barton, 1995) and Re^I (Yam et al., 1997), and studies on Cu^II, Co^II and Ni^II are still quite rare. As part of our effort to develop new functional complexes with such ligands, we report herein the crystal structure of a novel heptacoordinated Co^II complex, (I), with 6,7-dicyanodipyridoquinoxine (dcdpq).

Complex (I) is a neutral molecule due to the two coordinated nitrate anions (Fig. 1). The Co^II center has the unexpected heptacoordinated distorted pentagonal-bipyramid coordination geometry, consisting of two N atoms of the pyridine rings, four O atoms of two nitrate anions and an N atom of a CH₃CN molecule. Two N atoms of one pyridine ring, N1 and the CH₃CN molecule, N7, occupy the axial positions. The Co atom lies on the pentagonal least-squares plane defined by N2, O1, O2, O4 and O5, and deviates by 0.081 Å from the plane. Neither cyano group is coordinated to a Co atom. No significant intermolecular interactions were observed.

Experimental top

The ligand 6,7-dicyanodipyridoquinoxaline (dcdpq) was prepared according to the literature method of Arounaguiri & Maiya (1999). (I) was synthesized by mixing Co(NO₃)₂^.6H₂O (0.29 g, 1.0 mmol) and 6,7-dicyanodipyridoquinoxaline (0.28 g, 1.0 mmol) in CH₃CN solution (30 ml). The reaction mixture was filtered and left to stand at room temperature. Brown single crystals suitable for X-ray analysis were obtained by slow evaporation of the solvent. Yield: 350 mg (70%). FT—IR data (KBr pellet, cm^-1): 2934 (w), 2312 (m), 2286 (m), 2251 (m), 1767 (m), 1587 (s), 1577 (s), 1519 (m), 1472 (versus), 1397 (versus), 1383 (versus), 1364 (versus), 1302 (s), 1287 (s), 826 (m), 736 (s). Analysis calculated for C₁₈H₉CoN₉O₆: C 42.70, H 1.79, N 24.91%; found: C 42.55, H 1.93, N 24.87%.

Computing details top

Data collection: SMART (Bruker, 1998); cell refinement: SMART; data reduction: SAINT (Bruker, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: XP in SHELXTL (Bruker, 1998).

Figures top

Fig. 1. ORTEPII (Johnson, 1976) view of (I) with 30% probability displacement ellipsoids.

(I) top

Crystal data top

[Co(NO₃)₂(C₂H₃N)(C₁₆H₆N₆)]	F(000) = 510
M_r = 506.27	D_x = 1.681 Mg m⁻³
Monoclinic, P2₁	Mo Kα radiation, λ = 0.71073 Å
a = 8.3141 (8) Å	Cell parameters from 4702 reflections
b = 14.6625 (13) Å	θ = 2.5–26.4°
c = 9.0670 (9) Å	µ = 0.92 mm⁻¹
β = 115.154 (2)°	T = 298 K
V = 1000.50 (16) Å³	Prism, pink
Z = 2	0.35 × 0.20 × 0.20 mm

Data collection top

CCD X-ray diffractometer	3559 reflections with I > 2σ(I)
ω scans	R_int = 0.018
Absorption correction: integration (Bruker, 1998)	θ_max = 26.4°
T_min = 0.739, T_max = 0.838	h = −10→10
4749 measured reflections	k = −18→17
3809 independent reflections	l = −11→7

Refinement top

Refinement on F²	w = 1/[σ²(F_o²) + (0.0437P)²] where P = (F_o² + 2F_c²)/3
R[F² > 2σ(F²)] = 0.028	(Δ/σ)_max = 0.021
wR(F²) = 0.070	Δρ_max = 0.30 e Å⁻³
S = 1.05	Δρ_min = −0.23 e Å⁻³
3809 reflections	Absolute structure: Flack (1983)
343 parameters	Absolute structure parameter: 0.040 (11)
All H-atom parameters refined

Crystal data top

[Co(NO₃)₂(C₂H₃N)(C₁₆H₆N₆)]	V = 1000.50 (16) Å³
M_r = 506.27	Z = 2
Monoclinic, P2₁	Mo Kα radiation
a = 8.3141 (8) Å	µ = 0.92 mm⁻¹
b = 14.6625 (13) Å	T = 298 K
c = 9.0670 (9) Å	0.35 × 0.20 × 0.20 mm
β = 115.154 (2)°

Data collection top

CCD X-ray diffractometer	3809 independent reflections
Absorption correction: integration (Bruker, 1998)	3559 reflections with I > 2σ(I)
T_min = 0.739, T_max = 0.838	R_int = 0.018
4749 measured reflections

Refinement top

R[F² > 2σ(F²)] = 0.028	All H-atom parameters refined
wR(F²) = 0.070	Δρ_max = 0.30 e Å⁻³
S = 1.05	Δρ_min = −0.23 e Å⁻³
3809 reflections	Absolute structure: Flack (1983)
343 parameters	Absolute structure parameter: 0.040 (11)

Special details top

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

Refinement. Full-MATRIX

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

	x	y	z	U_iso*/U_eq
Co1	0.30515 (4)	0.78119 (2)	0.51845 (4)	0.03425 (9)
N1	0.5199 (3)	0.71289 (14)	0.5022 (2)	0.0313 (4)
N2	0.3863 (3)	0.68961 (15)	0.7195 (3)	0.0368 (5)
N3	0.9827 (3)	0.49596 (14)	0.7796 (2)	0.0323 (4)
N4	0.8329 (3)	0.46340 (15)	1.0000 (2)	0.0362 (5)
N5	1.3112 (4)	0.3384 (2)	0.9011 (3)	0.0658 (8)
N6	1.1104 (4)	0.2979 (2)	1.2330 (3)	0.0661 (8)
C1	0.5815 (3)	0.72551 (16)	0.3901 (3)	0.0356 (5)
C2	0.7285 (3)	0.68025 (18)	0.3920 (3)	0.0361 (5)
C3	0.8159 (3)	0.6190 (2)	0.5153 (3)	0.0355 (6)
C4	0.7530 (3)	0.60403 (16)	0.6330 (3)	0.0293 (5)
C5	0.8365 (3)	0.54024 (15)	0.7674 (3)	0.0289 (5)
C6	1.0490 (3)	0.43487 (17)	0.8973 (3)	0.0343 (5)
C7	0.9748 (3)	0.41900 (17)	1.0075 (3)	0.0353 (5)
C8	0.7624 (3)	0.52478 (16)	0.8797 (3)	0.0309 (5)
C9	0.6066 (3)	0.57602 (16)	0.8670 (3)	0.0323 (5)
C10	0.5294 (4)	0.5661 (2)	0.9773 (3)	0.0398 (6)
C11	0.3854 (4)	0.6183 (2)	0.9559 (3)	0.0456 (6)
C12	0.3175 (4)	0.6792 (2)	0.8264 (3)	0.0435 (6)
C13	0.5304 (3)	0.63865 (16)	0.7400 (3)	0.0297 (5)
C14	0.6041 (3)	0.65174 (16)	0.6212 (3)	0.0292 (5)
C16	1.0492 (4)	0.3509 (2)	1.1334 (3)	0.0461 (6)
C15	1.1991 (4)	0.38173 (19)	0.9035 (3)	0.0422 (6)
H1	0.528 (3)	0.7641 (19)	0.306 (3)	0.034 (7)*
H2	0.752 (4)	0.689 (2)	0.303 (4)	0.052 (8)*
H3	0.920 (4)	0.5847 (19)	0.521 (3)	0.037 (7)*
H10	0.576 (4)	0.524 (2)	1.050 (4)	0.058 (9)*
H11	0.327 (4)	0.614 (2)	1.030 (3)	0.047 (8)*
H12	0.222 (4)	0.714 (2)	0.805 (3)	0.039 (7)*
N7	0.0832 (3)	0.84796 (17)	0.5167 (3)	0.0445 (5)
O1	0.4243 (3)	0.90754 (13)	0.4847 (2)	0.0475 (5)
O2	0.4577 (4)	0.88192 (19)	0.7273 (3)	0.0706 (7)
O3	0.5780 (3)	1.00238 (16)	0.6780 (3)	0.0653 (6)
N8	0.4895 (3)	0.93300 (16)	0.6327 (3)	0.0443 (5)
O4	0.1224 (3)	0.66472 (15)	0.3790 (3)	0.0577 (6)
O5	0.1791 (2)	0.77157 (16)	0.2498 (2)	0.0499 (5)
O6	0.0278 (5)	0.6559 (3)	0.1169 (4)	0.1099 (12)
N9	0.1060 (3)	0.69523 (18)	0.2440 (3)	0.0527 (6)
C17	−0.0326 (4)	0.8934 (2)	0.5020 (3)	0.0401 (6)
C18	−0.1809 (5)	0.9524 (3)	0.4799 (5)	0.0512 (8)
H18A	−0.275 (6)	0.914 (4)	0.464 (5)	0.102 (16)*
H18B	−0.201 (5)	0.989 (3)	0.379 (5)	0.079 (12)*
H18C	−0.148 (6)	0.989 (3)	0.589 (6)	0.103 (14)*

Atomic displacement parameters (Å²) top

	U¹¹	U²²	U³³	U¹²	U¹³	U²³
Co1	0.03177 (15)	0.03190 (16)	0.03946 (16)	0.00509 (16)	0.01550 (12)	0.00551 (16)
N1	0.0290 (10)	0.0287 (9)	0.0351 (10)	0.0021 (8)	0.0125 (8)	0.0035 (8)
N2	0.0342 (11)	0.0387 (12)	0.0389 (11)	0.0060 (9)	0.0168 (10)	0.0040 (9)
N3	0.0321 (10)	0.0312 (10)	0.0324 (10)	0.0036 (9)	0.0126 (8)	−0.0006 (8)
N4	0.0416 (12)	0.0321 (10)	0.0348 (11)	0.0033 (9)	0.0161 (10)	0.0056 (8)
N5	0.0604 (17)	0.076 (2)	0.0551 (16)	0.0280 (16)	0.0183 (13)	−0.0043 (14)
N6	0.0799 (18)	0.062 (2)	0.0617 (15)	0.0291 (16)	0.0352 (14)	0.0255 (14)
C1	0.0376 (13)	0.0324 (13)	0.0343 (13)	0.0003 (10)	0.0129 (11)	0.0074 (10)
C2	0.0401 (14)	0.0390 (14)	0.0340 (12)	0.0001 (11)	0.0205 (11)	0.0042 (10)
C3	0.0356 (15)	0.0344 (15)	0.0401 (15)	0.0035 (11)	0.0197 (12)	−0.0013 (11)
C4	0.0310 (11)	0.0239 (10)	0.0308 (11)	−0.0025 (9)	0.0111 (9)	−0.0006 (9)
C5	0.0294 (11)	0.0236 (11)	0.0308 (12)	−0.0016 (9)	0.0100 (9)	−0.0025 (8)
C6	0.0350 (13)	0.0287 (12)	0.0349 (13)	0.0023 (10)	0.0107 (10)	−0.0042 (10)
C7	0.0384 (13)	0.0305 (12)	0.0332 (13)	0.0035 (10)	0.0115 (10)	0.0016 (10)
C8	0.0347 (12)	0.0262 (11)	0.0301 (12)	−0.0010 (9)	0.0122 (10)	−0.0009 (9)
C9	0.0327 (12)	0.0311 (12)	0.0336 (12)	−0.0021 (10)	0.0145 (10)	0.0010 (10)
C10	0.0434 (15)	0.0435 (14)	0.0351 (13)	0.0023 (12)	0.0194 (11)	0.0072 (11)
C11	0.0454 (15)	0.0556 (18)	0.0432 (15)	0.0036 (13)	0.0261 (13)	0.0036 (13)
C12	0.0382 (14)	0.0492 (16)	0.0486 (16)	0.0073 (13)	0.0236 (12)	0.0030 (12)
C13	0.0302 (12)	0.0284 (11)	0.0312 (12)	−0.0004 (10)	0.0139 (10)	−0.0003 (9)
C14	0.0299 (12)	0.0251 (11)	0.0317 (12)	−0.0026 (9)	0.0121 (9)	0.0001 (9)
C16	0.0527 (16)	0.0450 (15)	0.0439 (15)	0.0134 (13)	0.0236 (13)	0.0104 (13)
C15	0.0423 (14)	0.0438 (15)	0.0353 (13)	0.0109 (12)	0.0113 (11)	0.0009 (11)
N7	0.0426 (13)	0.0450 (13)	0.0517 (14)	0.0066 (11)	0.0258 (11)	0.0052 (11)
O1	0.0508 (11)	0.0415 (10)	0.0532 (12)	−0.0011 (9)	0.0250 (9)	−0.0036 (9)
O2	0.0777 (17)	0.0719 (17)	0.0503 (13)	−0.0125 (14)	0.0159 (12)	0.0099 (12)
O3	0.0589 (13)	0.0485 (12)	0.0858 (17)	−0.0125 (11)	0.0281 (12)	−0.0197 (12)
N8	0.0393 (12)	0.0362 (12)	0.0558 (15)	0.0034 (10)	0.0187 (11)	−0.0005 (11)
O4	0.0566 (12)	0.0490 (12)	0.0693 (15)	−0.0008 (10)	0.0286 (11)	0.0120 (11)
O5	0.0454 (9)	0.0469 (12)	0.0496 (10)	0.0005 (11)	0.0127 (8)	0.0068 (10)
O6	0.116 (3)	0.099 (2)	0.0689 (19)	−0.035 (2)	−0.0045 (17)	−0.0279 (17)
N9	0.0421 (13)	0.0495 (15)	0.0533 (15)	−0.0026 (11)	0.0075 (11)	−0.0028 (13)
C17	0.0389 (14)	0.0410 (14)	0.0463 (14)	−0.0019 (12)	0.0237 (12)	0.0024 (12)
C18	0.0481 (19)	0.0453 (19)	0.073 (2)	0.0094 (15)	0.0382 (18)	0.0013 (17)

Geometric parameters (Å, º) top

Co1—N7	2.083 (2)	C5—C8	1.415 (3)
Co1—N1	2.106 (2)	C6—C7	1.399 (4)
Co1—N2	2.130 (2)	C6—C15	1.451 (4)
Co1—O1	2.183 (2)	C7—C16	1.443 (4)
Co1—O5	2.2090 (18)	C8—C9	1.458 (3)
Co1—O4	2.278 (2)	C9—C13	1.397 (3)
Co1—O2	2.310 (3)	C9—C10	1.408 (4)
N1—C1	1.331 (3)	C10—C11	1.364 (4)
N1—C14	1.348 (3)	C10—H10	0.87 (4)
N2—C12	1.328 (4)	C11—C12	1.389 (4)
N2—C13	1.356 (3)	C11—H11	0.98 (3)
N3—C6	1.321 (3)	C12—H12	0.89 (3)
N3—C5	1.340 (3)	C13—C14	1.461 (3)
N4—C7	1.324 (3)	N7—C17	1.131 (4)
N4—C8	1.341 (3)	O1—N8	1.272 (3)
N5—C15	1.135 (4)	O2—N8	1.249 (4)
N6—C16	1.135 (4)	O3—N8	1.220 (3)
C1—C2	1.384 (4)	O4—N9	1.255 (3)
C1—H1	0.90 (3)	O5—N9	1.264 (3)
C2—C3	1.376 (4)	O6—N9	1.203 (4)
C2—H2	0.92 (3)	C17—C18	1.449 (4)
C3—C4	1.391 (3)	C18—H18A	0.92 (5)
C3—H3	0.98 (3)	C18—H18B	1.02 (4)
C4—C14	1.386 (3)	C18—H18C	1.06 (5)
C4—C5	1.457 (3)

N7—Co1—N1	175.95 (9)	C7—C6—C15	121.0 (2)
N7—Co1—N2	105.08 (9)	N4—C7—C6	122.4 (2)
N1—Co1—N2	77.92 (8)	N4—C7—C16	117.0 (2)
N7—Co1—O1	93.05 (8)	C6—C7—C16	120.6 (2)
N1—Co1—O1	86.85 (8)	N4—C8—C5	121.3 (2)
N2—Co1—O1	131.12 (8)	N4—C8—C9	118.5 (2)
N7—Co1—O5	91.02 (8)	C5—C8—C9	120.3 (2)
N1—Co1—O5	84.93 (7)	C13—C9—C10	118.0 (2)
N2—Co1—O5	137.11 (9)	C13—C9—C8	118.7 (2)
O1—Co1—O5	86.01 (8)	C10—C9—C8	123.2 (2)
N7—Co1—O4	88.20 (9)	C11—C10—C9	118.6 (3)
N1—Co1—O4	89.42 (8)	C11—C10—H10	126 (2)
N2—Co1—O4	84.05 (9)	C9—C10—H10	115 (2)
O1—Co1—O4	142.52 (8)	C10—C11—C12	119.9 (3)
O5—Co1—O4	56.51 (8)	C10—C11—H11	121.8 (18)
N7—Co1—O2	83.20 (10)	C12—C11—H11	118.3 (18)
N1—Co1—O2	100.08 (9)	N2—C12—C11	123.0 (3)
N2—Co1—O2	80.66 (8)	N2—C12—H12	113.5 (19)
O1—Co1—O2	56.53 (8)	C11—C12—H12	123.4 (19)
O5—Co1—O2	141.50 (9)	N2—C13—C9	122.7 (2)
O4—Co1—O2	159.83 (9)	N2—C13—C14	116.7 (2)
C1—N1—C14	117.8 (2)	C9—C13—C14	120.6 (2)
C1—N1—Co1	126.89 (16)	N1—C14—C4	122.7 (2)
C14—N1—Co1	115.30 (16)	N1—C14—C13	116.1 (2)
C12—N2—C13	117.8 (2)	C4—C14—C13	121.2 (2)
C12—N2—Co1	128.31 (19)	N6—C16—C7	178.9 (3)
C13—N2—Co1	113.88 (17)	N5—C15—C6	176.6 (3)
C6—N3—C5	116.6 (2)	C17—N7—Co1	169.9 (2)
C7—N4—C8	116.4 (2)	N8—O1—Co1	96.69 (16)
N1—C1—C2	123.2 (2)	N8—O2—Co1	91.34 (18)
N1—C1—H1	121.6 (16)	O3—N8—O2	122.9 (3)
C2—C1—H1	115.1 (16)	O3—N8—O1	121.7 (3)
C3—C2—C1	118.8 (2)	O2—N8—O1	115.4 (2)
C3—C2—H2	125 (2)	N9—O4—Co1	92.55 (16)
C1—C2—H2	116 (2)	N9—O5—Co1	95.59 (16)
C2—C3—C4	119.0 (2)	O6—N9—O4	123.6 (3)
C2—C3—H3	121.8 (17)	O6—N9—O5	121.3 (3)
C4—C3—H3	119.2 (17)	O4—N9—O5	115.1 (2)
C14—C4—C3	118.4 (2)	N7—C17—C18	178.7 (3)
C14—C4—C5	118.7 (2)	C17—C18—H18A	105 (3)
C3—C4—C5	122.8 (2)	C17—C18—H18B	104 (2)
N3—C5—C8	121.3 (2)	H18A—C18—H18B	112 (3)
N3—C5—C4	118.2 (2)	C17—C18—H18C	108 (3)
C8—C5—C4	120.4 (2)	H18A—C18—H18C	109 (4)
N3—C6—C7	122.0 (2)	H18B—C18—H18C	117 (4)
N3—C6—C15	116.9 (2)

Experimental details

Crystal data
Chemical formula	[Co(NO₃)₂(C₂H₃N)(C₁₆H₆N₆)]
M_r	506.27
Crystal system, space group	Monoclinic, P2₁
Temperature (K)	298
a, b, c (Å)	8.3141 (8), 14.6625 (13), 9.0670 (9)
β (°)	115.154 (2)
V (Å³)	1000.50 (16)
Z	2
Radiation type	Mo Kα
µ (mm⁻¹)	0.92
Crystal size (mm)	0.35 × 0.20 × 0.20

Data collection
Diffractometer	CCD X-ray diffractometer
Absorption correction	Integration (Bruker, 1998)
T_min, T_max	0.739, 0.838
No. of measured, independent and observed [I > 2σ(I)] reflections	4749, 3809, 3559
R_int	0.018
(sin θ/λ)_max (Å⁻¹)	0.626

Refinement
R[F² > 2σ(F²)], wR(F²), S	0.028, 0.070, 1.05
No. of reflections	3809
No. of parameters	343
No. of restraints	?
H-atom treatment	All H-atom parameters refined
Δρ_max, Δρ_min (e Å⁻³)	0.30, −0.23
Absolute structure	Flack (1983)
Absolute structure parameter	0.040 (11)

Computer programs: SMART (Bruker, 1998), SMART, SAINT (Bruker, 1998), SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), XP in SHELXTL (Bruker, 1998).

Selected geometric parameters (Å, º) top

Co1—N7	2.083 (2)	Co1—O5	2.2090 (18)
Co1—N1	2.106 (2)	Co1—O4	2.278 (2)
Co1—N2	2.130 (2)	Co1—O2	2.310 (3)
Co1—O1	2.183 (2)

N7—Co1—N1	175.95 (9)	N1—Co1—O4	89.42 (8)
N7—Co1—N2	105.08 (9)	N2—Co1—O4	84.05 (9)
N1—Co1—N2	77.92 (8)	O1—Co1—O4	142.52 (8)
N7—Co1—O1	93.05 (8)	O5—Co1—O4	56.51 (8)
N1—Co1—O1	86.85 (8)	N7—Co1—O2	83.20 (10)
N2—Co1—O1	131.12 (8)	N1—Co1—O2	100.08 (9)
N7—Co1—O5	91.02 (8)	N2—Co1—O2	80.66 (8)
N1—Co1—O5	84.93 (7)	O1—Co1—O2	56.53 (8)
N2—Co1—O5	137.11 (9)	O5—Co1—O2	141.50 (9)
O1—Co1—O5	86.01 (8)	O4—Co1—O2	159.83 (9)
N7—Co1—O4	88.20 (9)

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Format		BIBTeX
		EndNote
		RefMan
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		CIF
		SGML
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		Plain Text

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A novel heptacoordinated cobalt(II) complex of 6,7-di­cyano­dipyridoquinoxaline (dcdpq): [Co(NO3)2(CH3CN)(dcdpq)]

Supporting information

Key indicators

checkCIF results

A novel heptacoordinated cobalt(II) complex of 6,7-dicyanodipyridoquinoxaline (dcdpq): [Co(NO₃)₂(CH₃CN)(dcdpq)]