Dibromidotetra-kis(1H-indazole-κN)copper(II).

The Cu atom in the title compound, [CuBr(2)(C(7)H(6)N(2))(4)], is surrounded by four N-heterocycles that define an N(4) square-planar geometry. The coordination geometry is distorted towards an elongated octa-hedron owing to the presence of the two Br(-) anions, which are located at about 3 Å above and below the square plane. There are two independent molecules in the asymmetric unit, each with their Cu atom lying on an inversion centre.

Related literature

For related structures, see Hossaini Sadr et al. (2004 ▶, 2005 ▶, 2006 ▶). For related literature, see: Allen (2002 ▶).

Experimental

Crystal data

[CuBr2(C7H6N2)4]

M = 695.91

Triclinic,

a = 10.338 (1) Å

b = 10.923 (1) Å

c = 13.730 (1) Å

α = 72.545 (3)°

β = 77.329 (3)°

γ = 73.890 (3)°

V = 1405.3 (3) Å3

Z = 2

Mo Kα radiation

μ = 3.65 mm−1

T = 295 (2) K

0.24 × 0.21 × 0.12 mm

Data collection

Rigaku R-AXIS RAPID diffractometer

Absorption correction: multi-scan (ABSCOR; Higashi, 1995 ▶) T min = 0.073, T max = 0.668

13779 measured reflections

6389 independent reflections

2895 reflections with I > 2σ(I)

R int = 0.046

Refinement

R[F 2 > 2σ(F 2)] = 0.061

wR(F 2) = 0.228

S = 1.13

6389 reflections

356 parameters

12 restraints

H-atom parameters constrained

Δρmax = 0.65 e Å−3

Δρmin = −1.00 e Å−3

Data collection: RAPID-AUTO (Rigaku Corporation, 1998 ▶); cell refinement: RAPID-AUTO; data reduction: CrystalStructure (Rigaku/MSC, 2002 ▶); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997 ▶); molecular graphics: X-SEED (Barbour, 2001 ▶); software used to prepare material for publication: publCIF (Westrip, 2007 ▶).

Crystal structure: contains datablocks global, I. DOI: 10.1107/S1600536807062940/tk2226sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S1600536807062940/tk2226Isup2.hkl

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

[CuBr2(C7H6N2)4]	Z = 2
Mr = 695.91	F000 = 694
Triclinic, P1	Dx = 1.645 Mg m−3
Hall symbol: -P 1	Mo Kα radiation λ = 0.71073 Å
a = 10.338 (1) Å	Cell parameters from 7166 reflections
b = 10.923 (1) Å	θ = 3.2–27.5º
c = 13.730 (1) Å	µ = 3.65 mm−1
α = 72.545 (3)º	T = 295 (2) K
β = 77.329 (3)º	Prism, blue
γ = 73.890 (3)º	0.24 × 0.21 × 0.12 mm
V = 1405.3 (3) Å3

Rigaku R-AXIS RAPID diffractometer	6389 independent reflections
Radiation source: fine-focus sealed tube	2895 reflections with I > 2σ(I)
Monochromator: graphite	Rint = 0.046
Detector resolution: 10.000 pixels mm-1	θmax = 27.5º
T = 295(2) K	θmin = 3.2º
ω scans	h = −13→13
Absorption correction: multi-scan(ABSCOR; Higashi, 1995)	k = −11→14
Tmin = 0.073, Tmax = 0.668	l = −17→17
13779 measured reflections

Refinement on F2	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.061	H-atom parameters constrained
wR(F2) = 0.228	w = 1/[σ2(Fo2) + (0.1018P)2 + 0.0608P] where P = (Fo2 + 2Fc2)/3
S = 1.13	(Δ/σ)max = 0.001
6389 reflections	Δρmax = 0.65 e Å−3
356 parameters	Δρmin = −1.00 e Å−3
12 restraints	Extinction correction: SHELXL97 (Sheldrick, 1997), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
Primary atom site location: structure-invariant direct methods	Extinction coefficient: 0.008 (2)

	x	y	z	Uiso*/Ueq
Br1	0.62566 (10)	0.25866 (8)	0.41676 (7)	0.1011 (4)
Br2	−0.25176 (8)	0.40169 (7)	1.09777 (6)	0.0840 (3)
Cu1	0.5000	0.5000	0.5000	0.0843 (5)
Cu2	0.0000	0.5000	1.0000	0.1230 (8)
N1	0.5411 (5)	0.3924 (6)	0.6427 (4)	0.0636 (14)
N2	0.5199 (6)	0.4347 (6)	0.7267 (5)	0.0774 (16)
H2N	0.4877	0.5155	0.7291	0.093*
N3	0.3196 (6)	0.4493 (7)	0.5367 (4)	0.0748 (17)
N4	0.2108 (6)	0.5102 (6)	0.5891 (5)	0.0803 (17)
H4N	0.2071	0.5797	0.6078	0.096*
N5	0.0567 (9)	0.3532 (6)	0.9272 (5)	0.093 (2)
N6	0.1763 (9)	0.3169 (7)	0.8743 (6)	0.100 (2)
H6N	0.2408	0.3579	0.8604	0.120*
N7	−0.0951 (9)	0.6246 (6)	0.8816 (5)	0.090 (2)
N8	−0.0317 (7)	0.7102 (6)	0.8075 (5)	0.0885 (19)
H8N	0.0514	0.7141	0.8031	0.106*
C1	0.5920 (6)	0.2639 (6)	0.6683 (4)	0.0569 (15)
H1	0.6170	0.2106	0.6226	0.068*
C2	0.6029 (6)	0.2195 (6)	0.7719 (5)	0.0591 (15)
C3	0.6478 (8)	0.0951 (8)	0.8374 (6)	0.084 (2)
H3	0.6801	0.0206	0.8120	0.101*
C4	0.6428 (7)	0.0863 (9)	0.9382 (6)	0.090 (3)
H4	0.6683	0.0038	0.9828	0.108*
C5	0.6006 (8)	0.1974 (10)	0.9777 (6)	0.091 (3)
H5	0.6017	0.1881	1.0471	0.109*
C6	0.5577 (7)	0.3201 (9)	0.9148 (6)	0.086 (2)
H6	0.5296	0.3945	0.9404	0.103*
C7	0.5573 (6)	0.3298 (6)	0.8111 (4)	0.0592 (15)
C8	0.2874 (6)	0.3499 (7)	0.5225 (5)	0.0630 (16)
H8	0.3460	0.2906	0.4871	0.076*
C9	0.1562 (6)	0.3431 (7)	0.5663 (4)	0.0604 (16)
C10	0.0743 (8)	0.2577 (8)	0.5751 (6)	0.086 (2)
H10	0.1071	0.1862	0.5461	0.104*
C11	−0.0530 (8)	0.2800 (9)	0.6261 (7)	0.091 (2)
H11	−0.1082	0.2229	0.6327	0.109*
C12	−0.1034 (7)	0.3866 (9)	0.6692 (6)	0.084 (2)
H12	−0.1923	0.4004	0.7035	0.101*
C13	−0.0257 (7)	0.4712 (8)	0.6621 (6)	0.0763 (19)
H13	−0.0599	0.5420	0.6919	0.092*
C14	0.1048 (6)	0.4501 (6)	0.6102 (5)	0.0581 (15)
C15	−0.0112 (7)	0.2676 (7)	0.9321 (5)	0.0622 (16)
H15	−0.1001	0.2704	0.9658	0.075*
C16	0.0607 (6)	0.1736 (6)	0.8832 (5)	0.0578 (15)
C17	0.0283 (10)	0.0657 (9)	0.8687 (7)	0.096 (3)
H17	−0.0571	0.0472	0.8945	0.116*
C18	0.1251 (14)	−0.0105 (9)	0.8162 (8)	0.108 (3)
H18	0.1061	−0.0843	0.8069	0.130*
C19	0.2487 (11)	0.0154 (10)	0.7764 (7)	0.104 (3)
H19	0.3122	−0.0410	0.7408	0.124*
C20	0.2836 (7)	0.1224 (9)	0.7868 (6)	0.088 (2)
H20	0.3684	0.1409	0.7577	0.105*
C21	0.1863 (6)	0.2026 (6)	0.8430 (4)	0.0564 (14)
C22	−0.2200 (10)	0.6462 (7)	0.8630 (6)	0.086 (2)
H22	−0.2851	0.5999	0.9022	0.103*
C23	−0.2393 (9)	0.7522 (7)	0.7731 (6)	0.080 (2)
C24	−0.3451 (10)	0.8178 (9)	0.7148 (8)	0.103 (3)
H24	−0.4286	0.7942	0.7328	0.124*
C25	−0.3207 (13)	0.9197 (9)	0.6288 (7)	0.112 (3)
H25	−0.3900	0.9653	0.5893	0.135*
C26	−0.1982 (13)	0.9552 (10)	0.6004 (7)	0.113 (3)
H26	−0.1866	1.0240	0.5423	0.135*
C27	−0.0951 (11)	0.8941 (8)	0.6536 (6)	0.104 (3)
H27	−0.0121	0.9187	0.6346	0.124*
C28	−0.1185 (9)	0.7895 (7)	0.7408 (6)	0.080 (2)

	U11	U22	U33	U12	U13	U23
Br1	0.1416 (8)	0.0637 (6)	0.0882 (6)	0.0001 (5)	−0.0230 (5)	−0.0221 (4)
Br2	0.0917 (6)	0.0649 (5)	0.0874 (6)	−0.0117 (4)	−0.0083 (4)	−0.0166 (4)
Cu1	0.0608 (7)	0.1132 (11)	0.0637 (7)	−0.0366 (7)	−0.0251 (6)	0.0265 (7)
Cu2	0.232 (2)	0.0513 (8)	0.0766 (8)	0.0341 (10)	−0.0776 (11)	−0.0246 (6)
N1	0.054 (3)	0.085 (4)	0.051 (3)	−0.021 (3)	−0.012 (2)	−0.007 (3)
N2	0.070 (3)	0.069 (4)	0.083 (4)	−0.011 (3)	−0.020 (3)	−0.003 (3)
N3	0.064 (3)	0.086 (5)	0.057 (3)	−0.012 (3)	−0.015 (3)	0.007 (3)
N4	0.087 (4)	0.073 (4)	0.080 (4)	−0.021 (3)	−0.021 (3)	−0.011 (3)
N5	0.134 (6)	0.056 (4)	0.067 (4)	0.023 (4)	−0.027 (4)	−0.016 (3)
N6	0.151 (7)	0.067 (4)	0.097 (5)	−0.041 (5)	−0.055 (5)	−0.002 (4)
N7	0.151 (6)	0.042 (3)	0.072 (4)	0.002 (4)	−0.044 (4)	−0.010 (3)
N8	0.122 (5)	0.058 (4)	0.089 (4)	−0.008 (4)	−0.050 (4)	−0.011 (3)
C1	0.064 (3)	0.054 (4)	0.045 (3)	−0.007 (3)	−0.014 (3)	−0.004 (3)
C2	0.058 (3)	0.056 (4)	0.058 (3)	−0.009 (3)	−0.009 (3)	−0.011 (3)
C3	0.097 (5)	0.059 (4)	0.084 (5)	−0.008 (4)	−0.021 (4)	−0.005 (4)
C4	0.077 (5)	0.095 (6)	0.070 (5)	−0.010 (4)	−0.021 (4)	0.018 (4)
C5	0.083 (5)	0.121 (8)	0.055 (4)	−0.018 (5)	−0.016 (4)	−0.005 (5)
C6	0.078 (5)	0.100 (6)	0.072 (5)	−0.009 (4)	−0.011 (4)	−0.023 (4)
C7	0.055 (3)	0.069 (4)	0.047 (3)	−0.013 (3)	−0.009 (3)	−0.004 (3)
C8	0.051 (3)	0.066 (4)	0.063 (4)	−0.004 (3)	−0.003 (3)	−0.017 (3)
C9	0.051 (3)	0.073 (4)	0.053 (3)	−0.018 (3)	−0.009 (3)	−0.006 (3)
C10	0.084 (5)	0.081 (5)	0.103 (6)	−0.026 (4)	−0.009 (4)	−0.034 (4)
C11	0.076 (5)	0.098 (7)	0.106 (6)	−0.042 (5)	−0.028 (5)	−0.005 (5)
C12	0.059 (4)	0.092 (6)	0.079 (5)	−0.015 (4)	−0.001 (4)	0.002 (4)
C13	0.068 (4)	0.070 (5)	0.082 (5)	−0.005 (4)	−0.006 (4)	−0.020 (4)
C14	0.049 (3)	0.063 (4)	0.060 (3)	−0.025 (3)	−0.007 (3)	0.000 (3)
C15	0.062 (4)	0.061 (4)	0.056 (3)	0.000 (3)	−0.006 (3)	−0.017 (3)
C16	0.059 (3)	0.052 (4)	0.057 (3)	−0.010 (3)	−0.013 (3)	−0.006 (3)
C17	0.118 (6)	0.086 (6)	0.096 (6)	−0.060 (6)	−0.028 (5)	0.001 (5)
C18	0.166 (10)	0.056 (5)	0.117 (8)	−0.011 (6)	−0.058 (8)	−0.029 (5)
C19	0.123 (8)	0.086 (7)	0.094 (6)	0.031 (6)	−0.044 (6)	−0.042 (5)
C20	0.065 (4)	0.117 (7)	0.077 (5)	−0.011 (4)	−0.011 (4)	−0.026 (5)
C21	0.072 (4)	0.044 (3)	0.054 (3)	−0.011 (3)	−0.016 (3)	−0.012 (3)
C22	0.120 (7)	0.055 (5)	0.073 (5)	0.004 (4)	−0.014 (5)	−0.023 (4)
C23	0.112 (6)	0.055 (4)	0.068 (4)	0.009 (4)	−0.030 (4)	−0.022 (3)
C24	0.106 (6)	0.098 (7)	0.104 (6)	0.011 (5)	−0.028 (5)	−0.045 (5)
C25	0.153 (9)	0.082 (7)	0.087 (6)	0.032 (6)	−0.064 (7)	−0.020 (5)
C26	0.161 (10)	0.084 (7)	0.074 (5)	0.010 (7)	−0.030 (7)	−0.020 (5)
C27	0.156 (8)	0.059 (5)	0.087 (5)	−0.005 (5)	−0.038 (6)	−0.009 (4)
C28	0.118 (6)	0.050 (4)	0.069 (4)	−0.003 (4)	−0.035 (4)	−0.012 (3)

Cu1—N1	2.027 (5)	C6—H6	0.9300
Cu1—N3	2.008 (6)	C8—C9	1.370 (8)
Cu1—Br1	3.033 (1)	C8—H8	0.9300
Cu2—N5	2.024 (7)	C9—C10	1.389 (10)
Cu2—N7	2.023 (6)	C9—C14	1.395 (9)
Cu2—Br2	2.980 (1)	C10—C11	1.342 (11)
Cu1—N3i	2.008 (6)	C10—H10	0.9300
Cu1—N1i	2.027 (5)	C11—C12	1.385 (12)
Cu2—N7ii	2.023 (6)	C11—H11	0.9300
Cu2—N5ii	2.024 (7)	C12—C13	1.354 (12)
N1—N2	1.320 (8)	C12—H12	0.9300
N1—C1	1.321 (8)	C13—C14	1.374 (8)
N2—C7	1.400 (8)	C13—H13	0.9300
N2—H2N	0.8600	C15—C16	1.352 (9)
N3—C8	1.298 (9)	C15—H15	0.9300
N3—N4	1.320 (8)	C16—C21	1.378 (8)
N4—C14	1.364 (8)	C16—C17	1.389 (10)
N4—H4N	0.8600	C17—C18	1.340 (13)
N5—C15	1.295 (10)	C17—H17	0.9300
N5—N6	1.312 (9)	C18—C19	1.347 (13)
N6—C21	1.409 (9)	C18—H18	0.9300
N6—H6N	0.8600	C19—C20	1.368 (13)
N7—C22	1.315 (10)	C19—H19	0.9300
N7—N8	1.347 (9)	C20—C21	1.397 (10)
N8—C28	1.359 (9)	C20—H20	0.9300
N8—H8N	0.8600	C22—C23	1.424 (10)
C1—C2	1.377 (8)	C22—H22	0.9300
C1—H1	0.9300	C23—C28	1.362 (11)
C2—C7	1.388 (9)	C23—C24	1.399 (12)
C2—C3	1.404 (9)	C24—C25	1.391 (13)
C3—C4	1.348 (11)	C24—H24	0.9300
C3—H3	0.9300	C25—C26	1.368 (14)
C4—C5	1.398 (12)	C25—H25	0.9300
C4—H4	0.9300	C26—C27	1.330 (13)
C5—C6	1.372 (11)	C26—H26	0.9300
C5—H5	0.9300	C27—C28	1.415 (11)
C6—C7	1.396 (9)	C27—H27	0.9300
N3—Cu1—N3i	180.0 (4)	C5—C6—C7	118.0 (8)
N3—Cu1—N1	88.2 (2)	C5—C6—H6	121.0
N3i—Cu1—N1	91.8 (2)	C7—C6—H6	121.0
N3—Cu1—N1i	91.8 (2)	C2—C7—C6	121.1 (6)
N3i—Cu1—N1i	88.2 (2)	C2—C7—N2	104.9 (6)
N1—Cu1—N1i	180.00 (16)	C6—C7—N2	133.9 (7)
N3—Cu1—Br1i	90.3 (2)	N3—C8—C9	111.5 (6)
N3i—Cu1—Br1i	89.7 (2)	N3—C8—H8	124.2
N1—Cu1—Br1i	89.84 (18)	C9—C8—H8	124.2
N1i—Cu1—Br1i	90.16 (18)	C8—C9—C10	134.8 (7)
N3—Cu1—Br1	89.7 (2)	C8—C9—C14	105.7 (6)
N3i—Cu1—Br1	90.3 (2)	C10—C9—C14	119.6 (6)
N1—Cu1—Br1	90.16 (18)	C11—C10—C9	119.0 (8)
N1i—Cu1—Br1	89.84 (18)	C11—C10—H10	120.5
Br1i—Cu1—Br1	180.00 (3)	C9—C10—H10	120.5
N7ii—Cu2—N7	180.000 (2)	C10—C11—C12	121.1 (7)
N7ii—Cu2—N5ii	91.3 (2)	C10—C11—H11	119.5
N7—Cu2—N5ii	88.7 (2)	C12—C11—H11	119.5
N7ii—Cu2—N5	88.7 (2)	C13—C12—C11	121.2 (7)
N7—Cu2—N5	91.3 (2)	C13—C12—H12	119.4
N5ii—Cu2—N5	180.000 (2)	C11—C12—H12	119.4
N7ii—Cu2—Br2	89.4 (2)	C12—C13—C14	118.6 (8)
N7—Cu2—Br2	90.6 (2)	C12—C13—H13	120.7
N5ii—Cu2—Br2	92.4 (3)	C14—C13—H13	120.7
N5—Cu2—Br2	87.6 (3)	N4—C14—C13	135.3 (7)
N7ii—Cu2—Br2ii	90.6 (2)	N4—C14—C9	104.2 (5)
N7—Cu2—Br2ii	89.4 (2)	C13—C14—C9	120.6 (6)
N5ii—Cu2—Br2ii	87.6 (3)	N5—C15—C16	112.9 (6)
N5—Cu2—Br2ii	92.4 (3)	N5—C15—H15	123.6
Br2—Cu2—Br2ii	180.00 (3)	C16—C15—H15	123.6
N2—N1—C1	107.6 (5)	C15—C16—C21	106.6 (6)
N2—N1—Cu1	127.4 (5)	C15—C16—C17	132.2 (7)
C1—N1—Cu1	125.0 (5)	C21—C16—C17	121.2 (7)
N1—N2—C7	110.5 (6)	C18—C17—C16	117.3 (8)
N1—N2—H2N	124.8	C18—C17—H17	121.3
C7—N2—H2N	124.8	C16—C17—H17	121.3
C8—N3—N4	106.6 (6)	C17—C18—C19	122.6 (9)
C8—N3—Cu1	129.2 (5)	C17—C18—H18	118.7
N4—N3—Cu1	124.0 (6)	C19—C18—H18	118.7
N3—N4—C14	112.1 (6)	C18—C19—C20	121.9 (8)
N3—N4—H4N	124.0	C18—C19—H19	119.1
C14—N4—H4N	124.0	C20—C19—H19	119.1
C15—N5—N6	105.9 (6)	C19—C20—C21	117.1 (7)
C15—N5—Cu2	127.4 (6)	C19—C20—H20	121.5
N6—N5—Cu2	126.4 (7)	C21—C20—H20	121.5
N5—N6—C21	111.7 (7)	C16—C21—C20	119.8 (6)
N5—N6—H6N	124.1	C16—C21—N6	102.9 (6)
C21—N6—H6N	124.1	C20—C21—N6	137.2 (7)
C22—N7—N8	108.1 (6)	N7—C22—C23	108.8 (8)
C22—N7—Cu2	131.1 (6)	N7—C22—H22	125.6
N8—N7—Cu2	120.6 (6)	C23—C22—H22	125.6
N7—N8—C28	110.0 (7)	C28—C23—C24	118.2 (8)
N7—N8—H8N	125.0	C28—C23—C22	105.7 (7)
C28—N8—H8N	125.0	C24—C23—C22	136.1 (10)
N1—C1—C2	110.9 (6)	C25—C24—C23	117.5 (10)
N1—C1—H1	124.6	C25—C24—H24	121.2
C2—C1—H1	124.6	C23—C24—H24	121.2
C1—C2—C7	106.1 (5)	C26—C25—C24	122.1 (9)
C1—C2—C3	134.0 (7)	C26—C25—H25	119.0
C7—C2—C3	119.9 (6)	C24—C25—H25	119.0
C4—C3—C2	118.4 (8)	C27—C26—C25	121.9 (10)
C4—C3—H3	120.8	C27—C26—H26	119.0
C2—C3—H3	120.8	C25—C26—H26	119.0
C3—C4—C5	122.1 (7)	C26—C27—C28	116.4 (10)
C3—C4—H4	119.0	C26—C27—H27	121.8
C5—C4—H4	119.0	C28—C27—H27	121.8
C6—C5—C4	120.4 (7)	N8—C28—C23	107.4 (7)
C6—C5—H5	119.8	N8—C28—C27	128.8 (9)
C4—C5—H5	119.8	C23—C28—C27	123.8 (8)
N3—Cu1—N1—N2	−93.9 (5)	C5—C6—C7—N2	179.1 (7)
N3i—Cu1—N1—N2	86.1 (5)	N1—N2—C7—C2	−0.1 (7)
Br1i—Cu1—N1—N2	−3.6 (5)	N1—N2—C7—C6	178.9 (7)
Br1—Cu1—N1—N2	176.4 (5)	N4—N3—C8—C9	−0.4 (8)
N3—Cu1—N1—C1	84.4 (5)	Cu1—N3—C8—C9	174.8 (4)
N3i—Cu1—N1—C1	−95.6 (5)	N3—C8—C9—C10	−178.6 (8)
Br1i—Cu1—N1—C1	174.6 (5)	N3—C8—C9—C14	0.5 (7)
Br1—Cu1—N1—C1	−5.4 (5)	C8—C9—C10—C11	178.9 (7)
C1—N1—N2—C7	−0.5 (7)	C14—C9—C10—C11	−0.2 (11)
Cu1—N1—N2—C7	178.0 (4)	C9—C10—C11—C12	0.4 (13)
N1—Cu1—N3—C8	−91.4 (6)	C10—C11—C12—C13	−0.7 (13)
N1i—Cu1—N3—C8	88.6 (6)	C11—C12—C13—C14	0.7 (12)
Br1i—Cu1—N3—C8	178.8 (6)	N3—N4—C14—C13	178.6 (7)
Br1—Cu1—N3—C8	−1.2 (6)	N3—N4—C14—C9	0.3 (7)
N1—Cu1—N3—N4	83.0 (5)	C12—C13—C14—N4	−178.6 (7)
N1i—Cu1—N3—N4	−97.0 (5)	C12—C13—C14—C9	−0.5 (10)
Br1i—Cu1—N3—N4	−6.8 (5)	C8—C9—C14—N4	−0.5 (7)
Br1—Cu1—N3—N4	173.2 (5)	C10—C9—C14—N4	178.9 (6)
C8—N3—N4—C14	0.1 (7)	C8—C9—C14—C13	−179.1 (6)
Cu1—N3—N4—C14	−175.4 (4)	C10—C9—C14—C13	0.2 (10)
N7ii—Cu2—N5—C15	91.4 (7)	N6—N5—C15—C16	−0.1 (8)
N7—Cu2—N5—C15	−88.6 (7)	Cu2—N5—C15—C16	−173.3 (4)
Br2—Cu2—N5—C15	2.0 (6)	N5—C15—C16—C21	−0.2 (8)
Br2ii—Cu2—N5—C15	−178.0 (6)	N5—C15—C16—C17	−179.4 (7)
N7ii—Cu2—N5—N6	−80.5 (6)	C15—C16—C17—C18	−179.4 (8)
N7—Cu2—N5—N6	99.5 (6)	C21—C16—C17—C18	1.5 (11)
Br2—Cu2—N5—N6	−170.0 (6)	C16—C17—C18—C19	−1.3 (14)
Br2ii—Cu2—N5—N6	10.0 (6)	C17—C18—C19—C20	−0.2 (15)
C15—N5—N6—C21	0.3 (8)	C18—C19—C20—C21	1.5 (13)
Cu2—N5—N6—C21	173.7 (4)	C15—C16—C21—C20	−179.5 (6)
N5ii—Cu2—N7—C22	−92.2 (7)	C17—C16—C21—C20	−0.2 (10)
N5—Cu2—N7—C22	87.8 (7)	C15—C16—C21—N6	0.4 (7)
Br2—Cu2—N7—C22	0.3 (7)	C17—C16—C21—N6	179.7 (6)
Br2ii—Cu2—N7—C22	−179.7 (7)	C19—C20—C21—C16	−1.3 (11)
N5ii—Cu2—N7—N8	83.4 (6)	C19—C20—C21—N6	178.9 (7)
N5—Cu2—N7—N8	−96.6 (6)	N5—N6—C21—C16	−0.4 (7)
Br2—Cu2—N7—N8	175.8 (5)	N5—N6—C21—C20	179.4 (8)
Br2ii—Cu2—N7—N8	−4.2 (5)	N8—N7—C22—C23	−0.7 (8)
C22—N7—N8—C28	0.8 (8)	Cu2—N7—C22—C23	175.2 (5)
Cu2—N7—N8—C28	−175.7 (5)	N7—C22—C23—C28	0.4 (8)
N2—N1—C1—C2	0.9 (7)	N7—C22—C23—C24	178.5 (8)
Cu1—N1—C1—C2	−177.6 (4)	C28—C23—C24—C25	−1.7 (11)
N1—C1—C2—C7	−1.0 (7)	C22—C23—C24—C25	−179.7 (8)
N1—C1—C2—C3	179.1 (7)	C23—C24—C25—C26	0.6 (14)
C1—C2—C3—C4	−179.0 (7)	C24—C25—C26—C27	0.0 (15)
C7—C2—C3—C4	1.1 (11)	C25—C26—C27—C28	0.5 (14)
C2—C3—C4—C5	−3.0 (12)	N7—N8—C28—C23	−0.5 (8)
C3—C4—C5—C6	2.4 (12)	N7—N8—C28—C27	178.6 (7)
C4—C5—C6—C7	0.2 (11)	C24—C23—C28—N8	−178.4 (7)
C1—C2—C7—C6	−178.5 (6)	C22—C23—C28—N8	0.1 (8)
C3—C2—C7—C6	1.4 (10)	C24—C23—C28—C27	2.4 (11)
C1—C2—C7—N2	0.6 (7)	C22—C23—C28—C27	−179.1 (7)
C3—C2—C7—N2	−179.4 (6)	C26—C27—C28—N8	179.2 (8)
C5—C6—C7—C2	−2.0 (10)	C26—C27—C28—C23	−1.7 (13)

Table 1

Selected bond lengths (Å)

Cu1—N1	2.027 (5)
Cu1—N3	2.008 (6)
Cu1—Br1	3.033 (1)
Cu2—N5	2.024 (7)
Cu2—N7	2.023 (6)
Cu2—Br2	2.980 (1)