Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536805041358/cf6479sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536805041358/cf6479Isup2.hkl |
CCDC reference: 296734
Ru3(CO)12 (200 mg, 0.31 mmol) was added to a solution of 4,4'-dibromoazobenzene (210 mg, 0.62 mmol) in n-octane (30 ml), and the mixture heated at reflux for 4 h. The resulting brown solution was taken to dryness on a rotary evaporator, and the residue dissolved in a minimum of CH2Cl2 (ca 3 ml) and applied to preparative thin-layer chromatography plates. Elution with CH2Cl2/petrol ether (1/9) gave four bands and a heavy baseline: band 1 was yellow (RF =)/4; band 2 was orange (RF = 0.52); band 3 was yellow (RF = 0.21); band 4 (RF = 0.10) was yellow. The contents of band 4 were identified as Ru(CO)2(C12H7Br2N2)2, compound (I), (50 mg, 19%). MS (secondary ion, Cs+): 837 − 28n ([M − nCO]+, n = 0–2. IR (CH2Cl2): ν(CO) 2047 s, 1984 s cm−1. Crystals were obtained by liquid diffusion of methanol into a dichloromethane solution.
H atoms were included at idealized positions and made to ride on their parent atoms, with C—H = 1.00 Å and Uiso(H) = 1.2Ueq(C).
Data collection: COLLECT (Nonius, 1997); cell refinement: DENZO/SCALEPACK (Otwinowski & Minor, 1997); data reduction: DENZO/SCALEPACK; program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: CRYSTALS (Betteridge et al., 2003); molecular graphics: ORTEPII (Johnson, 1976) in TEXSAN (Molecular Structure Corporation, 1997); software used to prepare material for publication: CRYSTALS.
Fig. 1. The molecular structure of (I), showing 30% probability displacement ellipsoids. H atoms have been omitted for clarity. |
[Ru(C12H7Br2N2)2(CO)2] | F(000) = 1592 |
Mr = 835.11 | Dx = 2.115 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 32959 reflections |
a = 13.5277 (2) Å | θ = 3–27° |
b = 12.4006 (3) Å | µ = 6.73 mm−1 |
c = 15.6585 (2) Å | T = 200 K |
β = 93.176 (1)° | Block, orange |
V = 2622.70 (8) Å3 | 0.38 × 0.21 × 0.14 mm |
Z = 4 |
Nonius KappaCCD diffractometer | 4200 reflections with I > 3σ(I) |
Graphite monochromator | Rint = 0.05 |
ϕ and ω scans | θmax = 27.5°, θmin = 3.3° |
Absorption correction: integration (Coppens, 1970) | h = −17→17 |
Tmin = 0.192, Tmax = 0.497 | k = −16→16 |
49588 measured reflections | l = −20→20 |
5998 independent reflections |
Refinement on F | 0 restraints |
R[F2 > 2σ(F2)] = 0.025 | w = [1-(Fo-Fc)2/36σ2(F)]2/[1.39T0(x)-0.108T1(x) + 0.987T2(x)]
where Ti are Chebychev polynomials and x = Fc/Fmax (Prince, 1982; Watkin, 1994) |
wR(F2) = 0.028 | (Δ/σ)max = 0.002 |
S = 1.09 | Δρmax = 0.95 e Å−3 |
4200 reflections | Δρmin = −0.75 e Å−3 |
334 parameters |
[Ru(C12H7Br2N2)2(CO)2] | V = 2622.70 (8) Å3 |
Mr = 835.11 | Z = 4 |
Monoclinic, P21/n | Mo Kα radiation |
a = 13.5277 (2) Å | µ = 6.73 mm−1 |
b = 12.4006 (3) Å | T = 200 K |
c = 15.6585 (2) Å | 0.38 × 0.21 × 0.14 mm |
β = 93.176 (1)° |
Nonius KappaCCD diffractometer | 5998 independent reflections |
Absorption correction: integration (Coppens, 1970) | 4200 reflections with I > 3σ(I) |
Tmin = 0.192, Tmax = 0.497 | Rint = 0.05 |
49588 measured reflections |
R[F2 > 2σ(F2)] = 0.025 | 334 parameters |
wR(F2) = 0.028 | 0 restraints |
S = 1.09 | Δρmax = 0.95 e Å−3 |
4200 reflections | Δρmin = −0.75 e Å−3 |
x | y | z | Uiso*/Ueq | ||
Ru1 | 0.754629 (17) | 0.578893 (19) | 0.607309 (15) | 0.0213 | |
Br11 | 1.01812 (3) | 0.95706 (4) | 0.70555 (3) | 0.0492 | |
Br12 | 0.67482 (3) | 0.21752 (3) | 0.22049 (2) | 0.0444 | |
Br21 | 0.50973 (3) | 0.84548 (3) | 0.35052 (2) | 0.0367 | |
Br22 | 0.76775 (3) | 0.52785 (3) | 1.09337 (2) | 0.0402 | |
O1 | 0.5920 (2) | 0.4045 (3) | 0.5985 (2) | 0.0552 | |
O2 | 0.9309 (2) | 0.4522 (3) | 0.68953 (19) | 0.0492 | |
N11 | 0.80505 (18) | 0.5535 (2) | 0.48647 (15) | 0.0227 | |
N12 | 0.87088 (19) | 0.6155 (2) | 0.45750 (16) | 0.0261 | |
N21 | 0.70005 (18) | 0.6453 (2) | 0.71766 (16) | 0.0227 | |
N22 | 0.63669 (19) | 0.7219 (2) | 0.71081 (16) | 0.0255 | |
C1 | 0.6526 (3) | 0.4669 (3) | 0.6022 (2) | 0.0305 | |
C2 | 0.8628 (2) | 0.4942 (3) | 0.6614 (2) | 0.0287 | |
C111 | 0.9015 (2) | 0.6964 (3) | 0.5152 (2) | 0.0268 | |
C112 | 0.8612 (2) | 0.6994 (2) | 0.59614 (19) | 0.0243 | |
C113 | 0.8980 (2) | 0.7774 (3) | 0.6528 (2) | 0.0273 | |
C114 | 0.9683 (2) | 0.8511 (3) | 0.6269 (2) | 0.0316 | |
C115 | 1.0043 (3) | 0.8503 (3) | 0.5457 (2) | 0.0347 | |
C116 | 0.9710 (2) | 0.7713 (3) | 0.4890 (2) | 0.0329 | |
C121 | 0.7747 (2) | 0.4695 (2) | 0.42717 (18) | 0.0239 | |
C122 | 0.6744 (2) | 0.4515 (3) | 0.4089 (2) | 0.0287 | |
C123 | 0.6446 (3) | 0.3752 (3) | 0.3480 (2) | 0.0309 | |
C124 | 0.7156 (3) | 0.3172 (3) | 0.30732 (19) | 0.0321 | |
C125 | 0.8153 (3) | 0.3324 (3) | 0.3269 (2) | 0.0374 | |
C126 | 0.8453 (3) | 0.4102 (3) | 0.3865 (2) | 0.0334 | |
C211 | 0.6092 (2) | 0.7485 (2) | 0.62670 (19) | 0.0241 | |
C212 | 0.6529 (2) | 0.6940 (2) | 0.5592 (2) | 0.0238 | |
C213 | 0.6234 (2) | 0.7251 (3) | 0.4763 (2) | 0.0269 | |
C214 | 0.5516 (2) | 0.8055 (3) | 0.4632 (2) | 0.0272 | |
C215 | 0.5081 (2) | 0.8577 (3) | 0.5299 (2) | 0.0293 | |
C216 | 0.5378 (2) | 0.8290 (3) | 0.6132 (2) | 0.0297 | |
C221 | 0.7250 (2) | 0.6190 (3) | 0.80583 (19) | 0.0245 | |
C222 | 0.7422 (2) | 0.5121 (3) | 0.8293 (2) | 0.0267 | |
C223 | 0.7555 (2) | 0.4849 (3) | 0.9152 (2) | 0.0292 | |
C224 | 0.7540 (2) | 0.5655 (3) | 0.97620 (19) | 0.0294 | |
C225 | 0.7416 (3) | 0.6736 (3) | 0.9538 (2) | 0.0335 | |
C226 | 0.7258 (3) | 0.6992 (3) | 0.8680 (2) | 0.0303 | |
H1131 | 0.8743 | 0.7809 | 0.7121 | 0.0327* | |
H1151 | 1.0531 | 0.9057 | 0.5285 | 0.0417* | |
H1161 | 0.9961 | 0.7677 | 0.4302 | 0.0395* | |
H1221 | 0.6240 | 0.4933 | 0.4394 | 0.0344* | |
H1231 | 0.5727 | 0.3622 | 0.3337 | 0.0370* | |
H1251 | 0.8655 | 0.2878 | 0.2984 | 0.0452* | |
H1261 | 0.9174 | 0.4234 | 0.4001 | 0.0401* | |
H2131 | 0.6533 | 0.6901 | 0.4263 | 0.0322* | |
H2151 | 0.4566 | 0.9146 | 0.5184 | 0.0350* | |
H2161 | 0.5084 | 0.8654 | 0.6629 | 0.0357* | |
H2221 | 0.7450 | 0.4550 | 0.7844 | 0.0321* | |
H2231 | 0.7660 | 0.4080 | 0.9328 | 0.0351* | |
H2251 | 0.7440 | 0.7312 | 0.9985 | 0.0402* | |
H2261 | 0.7149 | 0.7761 | 0.8506 | 0.0363* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ru1 | 0.02339 (11) | 0.01940 (11) | 0.02132 (11) | 0.00000 (9) | 0.00195 (8) | 0.00054 (9) |
Br11 | 0.0421 (2) | 0.0513 (2) | 0.0549 (2) | −0.01992 (18) | 0.00908 (17) | −0.02564 (19) |
Br12 | 0.0650 (3) | 0.0387 (2) | 0.02878 (17) | −0.00613 (18) | −0.00311 (16) | −0.01149 (14) |
Br21 | 0.04012 (19) | 0.03902 (19) | 0.02996 (17) | 0.00306 (15) | −0.00832 (14) | 0.00638 (14) |
Br22 | 0.0427 (2) | 0.0545 (2) | 0.02356 (16) | 0.00860 (17) | 0.00230 (13) | 0.00586 (14) |
O1 | 0.0595 (18) | 0.0520 (18) | 0.0551 (18) | −0.0338 (15) | 0.0127 (14) | −0.0075 (14) |
O2 | 0.0369 (14) | 0.0555 (17) | 0.0547 (16) | 0.0144 (13) | −0.0012 (12) | 0.0209 (14) |
N11 | 0.0221 (12) | 0.0232 (12) | 0.0227 (12) | 0.0014 (10) | −0.0003 (9) | 0.0003 (10) |
N12 | 0.0282 (13) | 0.0270 (13) | 0.0231 (12) | −0.0048 (11) | 0.0009 (10) | 0.0012 (10) |
N21 | 0.0237 (12) | 0.0210 (12) | 0.0234 (12) | 0.0000 (10) | 0.0019 (9) | 0.0014 (10) |
N22 | 0.0275 (13) | 0.0219 (12) | 0.0272 (13) | 0.0012 (10) | 0.0021 (10) | 0.0007 (10) |
C1 | 0.0355 (17) | 0.0271 (16) | 0.0294 (16) | 0.0003 (14) | 0.0064 (13) | −0.0020 (13) |
C2 | 0.0345 (17) | 0.0275 (16) | 0.0244 (14) | −0.0019 (13) | 0.0030 (13) | 0.0037 (12) |
C111 | 0.0271 (15) | 0.0273 (15) | 0.0258 (14) | −0.0029 (12) | −0.0006 (12) | 0.0015 (12) |
C112 | 0.0234 (14) | 0.0224 (15) | 0.0268 (14) | 0.0020 (11) | −0.0019 (11) | 0.0031 (12) |
C113 | 0.0267 (15) | 0.0290 (16) | 0.0261 (15) | 0.0003 (13) | −0.0001 (12) | −0.0019 (12) |
C114 | 0.0267 (15) | 0.0294 (17) | 0.0386 (18) | −0.0034 (13) | −0.0008 (13) | −0.0080 (14) |
C115 | 0.0304 (17) | 0.0359 (18) | 0.0380 (18) | −0.0104 (14) | 0.0028 (14) | 0.0007 (14) |
C116 | 0.0317 (17) | 0.0382 (19) | 0.0290 (16) | −0.0079 (14) | 0.0029 (13) | 0.0006 (14) |
C121 | 0.0304 (15) | 0.0205 (14) | 0.0209 (13) | 0.0005 (12) | 0.0004 (11) | 0.0003 (11) |
C122 | 0.0308 (16) | 0.0264 (15) | 0.0288 (15) | 0.0001 (13) | 0.0006 (12) | −0.0028 (13) |
C123 | 0.0320 (16) | 0.0282 (16) | 0.0322 (16) | −0.0045 (14) | −0.0012 (13) | 0.0003 (13) |
C124 | 0.049 (2) | 0.0268 (16) | 0.0199 (14) | −0.0038 (14) | −0.0004 (13) | −0.0033 (12) |
C125 | 0.044 (2) | 0.0368 (19) | 0.0324 (17) | 0.0027 (16) | 0.0086 (15) | −0.0104 (15) |
C126 | 0.0310 (16) | 0.0361 (19) | 0.0333 (16) | 0.0006 (14) | 0.0029 (13) | −0.0037 (14) |
C211 | 0.0239 (14) | 0.0228 (14) | 0.0256 (14) | 0.0009 (11) | 0.0018 (11) | 0.0003 (11) |
C212 | 0.0231 (14) | 0.0206 (14) | 0.0273 (14) | −0.0002 (11) | −0.0002 (11) | 0.0032 (12) |
C213 | 0.0285 (15) | 0.0245 (15) | 0.0275 (15) | 0.0009 (12) | −0.0010 (12) | 0.0016 (12) |
C214 | 0.0251 (14) | 0.0254 (15) | 0.0305 (16) | −0.0035 (12) | −0.0036 (12) | 0.0034 (13) |
C215 | 0.0254 (15) | 0.0283 (16) | 0.0337 (16) | 0.0042 (12) | −0.0026 (12) | 0.0012 (13) |
C216 | 0.0293 (16) | 0.0273 (16) | 0.0326 (16) | 0.0014 (13) | 0.0033 (13) | −0.0002 (13) |
C221 | 0.0244 (14) | 0.0271 (15) | 0.0218 (14) | 0.0001 (12) | 0.0007 (11) | 0.0019 (12) |
C222 | 0.0314 (16) | 0.0240 (15) | 0.0248 (14) | 0.0021 (12) | 0.0017 (12) | −0.0007 (12) |
C223 | 0.0304 (16) | 0.0281 (16) | 0.0292 (16) | 0.0025 (13) | 0.0022 (13) | 0.0033 (13) |
C224 | 0.0264 (14) | 0.0403 (19) | 0.0216 (14) | 0.0037 (13) | 0.0022 (11) | 0.0004 (13) |
C225 | 0.0416 (19) | 0.0324 (18) | 0.0264 (16) | 0.0033 (15) | 0.0009 (13) | −0.0030 (13) |
C226 | 0.0395 (18) | 0.0234 (15) | 0.0280 (15) | 0.0034 (13) | 0.0001 (13) | −0.0025 (12) |
Ru1—N11 | 2.071 (2) | C121—C126 | 1.388 (4) |
Ru1—N21 | 2.086 (2) | C122—C123 | 1.387 (5) |
Ru1—C1 | 1.957 (3) | C122—H1221 | 1.000 |
Ru1—C2 | 1.956 (3) | C123—C124 | 1.383 (5) |
Ru1—C112 | 2.090 (3) | C123—H1231 | 1.000 |
Ru1—C212 | 2.093 (3) | C124—C125 | 1.380 (5) |
Br11—C114 | 1.898 (3) | C125—C126 | 1.387 (5) |
Br12—C124 | 1.897 (3) | C125—H1251 | 1.000 |
Br21—C214 | 1.889 (3) | C126—H1261 | 1.000 |
Br22—C224 | 1.892 (3) | C211—C212 | 1.412 (4) |
O1—C1 | 1.127 (4) | C211—C216 | 1.396 (4) |
O2—C2 | 1.127 (4) | C212—C213 | 1.392 (4) |
N11—N12 | 1.279 (4) | C213—C214 | 1.399 (4) |
N11—C121 | 1.439 (4) | C213—H2131 | 1.000 |
N12—C111 | 1.397 (4) | C214—C215 | 1.388 (5) |
N21—N22 | 1.280 (4) | C215—C216 | 1.390 (5) |
N21—C221 | 1.440 (4) | C215—H2151 | 1.000 |
N22—C211 | 1.388 (4) | C216—H2161 | 1.000 |
C111—C112 | 1.407 (4) | C221—C222 | 1.392 (4) |
C111—C116 | 1.399 (4) | C221—C226 | 1.391 (4) |
C112—C113 | 1.387 (4) | C222—C223 | 1.390 (4) |
C113—C114 | 1.395 (5) | C222—H2221 | 1.000 |
C113—H1131 | 1.000 | C223—C224 | 1.382 (5) |
C114—C115 | 1.387 (5) | C223—H2231 | 1.000 |
C115—C116 | 1.380 (5) | C224—C225 | 1.394 (5) |
C115—H1151 | 1.000 | C225—C226 | 1.385 (5) |
C116—H1161 | 1.000 | C225—H2251 | 1.000 |
C121—C122 | 1.390 (4) | C226—H2261 | 1.000 |
Br11···C123i | 3.436 (4) | O2···N22v | 3.404 (4) |
Br11···O1ii | 3.545 (3) | O2···C216v | 3.451 (4) |
Br11···C222ii | 3.599 (3) | C113···C223ii | 3.438 (5) |
Br12···N12iii | 3.092 (2) | C113···C222ii | 3.494 (5) |
Br21···O1iv | 3.502 (4) | C114···C223ii | 3.483 (4) |
O1···C214iv | 3.359 (5) | C114···C222ii | 3.575 (4) |
O1···C213iv | 3.474 (4) | C211···C223ii | 3.537 (4) |
O1···C226v | 3.562 (5) | C216···C223ii | 3.448 (4) |
N11—Ru1—N21 | 165.18 (10) | C122—C123—C124 | 119.2 (3) |
N11—Ru1—C1 | 97.02 (12) | C122—C123—H1231 | 120.377 |
N21—Ru1—C1 | 91.87 (12) | C124—C123—H1231 | 120.380 |
N11—Ru1—C2 | 92.13 (11) | Br12—C124—C123 | 119.1 (3) |
N21—Ru1—C2 | 98.29 (12) | Br12—C124—C125 | 119.3 (3) |
C1—Ru1—C2 | 98.38 (14) | C123—C124—C125 | 121.5 (3) |
N11—Ru1—C112 | 76.62 (11) | C124—C125—C126 | 119.3 (3) |
N21—Ru1—C112 | 93.71 (11) | C124—C125—H1251 | 120.331 |
C1—Ru1—C112 | 172.86 (12) | C126—C125—H1251 | 120.330 |
C2—Ru1—C112 | 85.23 (12) | C121—C126—C125 | 119.6 (3) |
N11—Ru1—C212 | 91.05 (11) | C121—C126—H1261 | 120.177 |
N21—Ru1—C212 | 76.88 (11) | C125—C126—H1261 | 120.177 |
C1—Ru1—C212 | 91.21 (13) | N22—C211—C212 | 119.6 (3) |
C2—Ru1—C212 | 169.44 (13) | N22—C211—C216 | 117.4 (3) |
C112—Ru1—C212 | 85.72 (11) | C212—C211—C216 | 123.0 (3) |
Ru1—N11—N12 | 120.3 (2) | C211—C212—Ru1 | 110.6 (2) |
Ru1—N11—C121 | 127.09 (19) | C211—C212—C213 | 117.1 (3) |
N12—N11—C121 | 112.7 (2) | Ru1—C212—C213 | 132.3 (2) |
N11—N12—C111 | 112.9 (3) | C212—C213—C214 | 119.7 (3) |
Ru1—N21—N22 | 119.32 (19) | C212—C213—H2131 | 120.165 |
Ru1—N21—C221 | 129.05 (19) | C214—C213—H2131 | 120.168 |
N22—N21—C221 | 111.6 (2) | Br21—C214—C213 | 119.6 (2) |
N21—N22—C211 | 113.5 (2) | Br21—C214—C215 | 117.6 (2) |
Ru1—C1—O1 | 178.1 (3) | C213—C214—C215 | 122.9 (3) |
Ru1—C2—O2 | 173.6 (3) | C214—C215—C216 | 118.3 (3) |
N12—C111—C112 | 119.0 (3) | C214—C215—H2151 | 120.849 |
N12—C111—C116 | 117.8 (3) | C216—C215—H2151 | 120.847 |
C112—C111—C116 | 123.1 (3) | C211—C216—C215 | 119.1 (3) |
C111—C112—Ru1 | 111.1 (2) | C211—C216—H2161 | 120.446 |
C111—C112—C113 | 116.8 (3) | C215—C216—H2161 | 120.448 |
Ru1—C112—C113 | 132.1 (2) | N21—C221—C222 | 119.7 (3) |
C112—C113—C114 | 119.9 (3) | N21—C221—C226 | 120.1 (3) |
C112—C113—H1131 | 120.071 | C222—C221—C226 | 120.1 (3) |
C114—C113—H1131 | 120.069 | C221—C222—C223 | 119.8 (3) |
Br11—C114—C113 | 119.2 (3) | C221—C222—H2221 | 120.090 |
Br11—C114—C115 | 118.0 (3) | C223—C222—H2221 | 120.091 |
C113—C114—C115 | 122.8 (3) | C222—C223—C224 | 119.2 (3) |
C114—C115—C116 | 118.4 (3) | C222—C223—H2231 | 120.417 |
C114—C115—H1151 | 120.790 | C224—C223—H2231 | 120.418 |
C116—C115—H1151 | 120.790 | Br22—C224—C223 | 119.1 (3) |
C111—C116—C115 | 118.9 (3) | Br22—C224—C225 | 119.0 (2) |
C111—C116—H1161 | 120.544 | C223—C224—C225 | 121.8 (3) |
C115—C116—H1161 | 120.538 | C224—C225—C226 | 118.4 (3) |
N11—C121—C122 | 119.3 (3) | C224—C225—H2251 | 120.812 |
N11—C121—C126 | 120.1 (3) | C226—C225—H2251 | 120.813 |
C122—C121—C126 | 120.6 (3) | C221—C226—C225 | 120.6 (3) |
C121—C122—C123 | 119.7 (3) | C221—C226—H2261 | 119.706 |
C121—C122—H1221 | 120.171 | C225—C226—H2261 | 119.707 |
C123—C122—H1221 | 120.170 | ||
Ru1—N11—N12—C111 | 0.2 (3) | N22—N21—Ru1—C212 | −1.8 (2) |
Ru1—N11—C121—C122 | 49.7 (3) | N22—N21—C221—C222 | 143.3 (3) |
Ru1—N11—C121—C126 | −132.7 (3) | N22—N21—C221—C226 | −32.6 (4) |
Ru1—N21—N22—C211 | 2.4 (3) | N22—C211—C212—C213 | −179.2 (3) |
Ru1—N21—C221—C222 | −38.1 (4) | N22—C211—C216—C215 | −179.8 (3) |
Ru1—N21—C221—C226 | 145.9 (3) | C1—Ru1—N11—C121 | −5.3 (2) |
Ru1—C112—C111—N12 | −2.8 (3) | C1—Ru1—N21—C221 | 88.9 (3) |
Ru1—C112—C111—C116 | 176.8 (2) | C1—Ru1—C212—C211 | 92.4 (2) |
Ru1—C112—C113—C114 | −178.0 (2) | C1—Ru1—C212—C213 | −88.4 (3) |
Ru1—C212—C211—N22 | 0.2 (3) | C2—Ru1—N11—C121 | 93.4 (2) |
Ru1—C212—C211—C216 | −179.4 (2) | C2—Ru1—N21—C221 | −9.8 (3) |
Ru1—C212—C213—C214 | 179.4 (2) | C2—Ru1—C112—C111 | 95.4 (2) |
Br11—C114—C113—C112 | −179.8 (2) | C2—Ru1—C112—C113 | −83.7 (3) |
Br11—C114—C115—C116 | 177.9 (3) | C111—N12—N11—C121 | −179.3 (2) |
Br12—C124—C123—C122 | −177.2 (3) | C111—C112—Ru1—C212 | −90.0 (2) |
Br12—C124—C125—C126 | 175.9 (3) | C111—C112—C113—C114 | 2.9 (4) |
Br21—C214—C213—C212 | −178.7 (2) | C111—C116—C115—C114 | 0.9 (5) |
Br21—C214—C215—C216 | 179.8 (2) | C112—Ru1—N11—C121 | 178.0 (2) |
Br22—C224—C223—C222 | 177.9 (2) | C112—Ru1—N21—C221 | −95.6 (3) |
Br22—C224—C225—C226 | −176.3 (3) | C112—Ru1—C212—C211 | −94.1 (2) |
N11—Ru1—C112—C111 | 2.1 (2) | C112—Ru1—C212—C213 | 85.2 (3) |
N11—Ru1—C112—C113 | −177.1 (3) | C112—C111—C116—C115 | 2.0 (5) |
N11—Ru1—C212—C211 | −170.6 (2) | C112—C113—C114—C115 | −0.2 (5) |
N11—Ru1—C212—C213 | 8.6 (3) | C113—C112—Ru1—C212 | 90.8 (3) |
N11—N12—C111—C112 | 1.8 (4) | C113—C112—C111—C116 | −3.9 (4) |
N11—N12—C111—C116 | −177.8 (3) | C113—C114—C115—C116 | −1.8 (5) |
N11—C121—C122—C123 | 176.1 (3) | C121—N11—Ru1—C212 | −96.6 (2) |
N11—C121—C126—C125 | −177.4 (3) | C121—C122—C123—C124 | 0.9 (5) |
N12—N11—Ru1—C1 | 175.4 (2) | C121—C126—C125—C124 | 1.7 (5) |
N12—N11—Ru1—C2 | −85.9 (2) | C122—C121—C126—C125 | 0.1 (5) |
N12—N11—Ru1—C112 | −1.3 (2) | C122—C123—C124—C125 | 1.0 (5) |
N12—N11—Ru1—C212 | 84.0 (2) | C123—C122—C121—C126 | −1.5 (5) |
N12—N11—C121—C122 | −130.9 (3) | C123—C124—C125—C126 | −2.3 (5) |
N12—N11—C121—C126 | 46.7 (4) | C211—N22—N21—C221 | −178.9 (2) |
N12—C111—C112—C113 | 176.5 (3) | C211—C212—C213—C214 | −1.4 (4) |
N12—C111—C116—C115 | −178.3 (3) | C211—C216—C215—C214 | −0.6 (5) |
N21—Ru1—C112—C111 | −166.6 (2) | C212—Ru1—N21—C221 | 179.7 (3) |
N21—Ru1—C112—C113 | 14.3 (3) | C212—C211—C216—C215 | −0.2 (4) |
N21—Ru1—C212—C211 | 0.8 (2) | C212—C213—C214—C215 | 0.7 (5) |
N21—Ru1—C212—C213 | 180.0 (3) | C213—C212—C211—C216 | 1.3 (4) |
N21—N22—C211—C212 | −1.6 (4) | C213—C214—C215—C216 | 0.4 (5) |
N21—N22—C211—C216 | 178.0 (3) | C221—C222—C223—C224 | −1.7 (4) |
N21—C221—C222—C223 | −172.9 (3) | C221—C226—C225—C224 | −1.7 (6) |
N21—C221—C226—C225 | 174.6 (3) | C222—C221—C226—C225 | −1.3 (5) |
N22—N21—Ru1—C1 | −92.6 (2) | C222—C223—C224—C225 | −1.4 (4) |
N22—N21—Ru1—C2 | 168.6 (2) | C223—C222—C221—C226 | 3.1 (4) |
N22—N21—Ru1—C112 | 82.9 (2) | C223—C224—C225—C226 | 3.1 (5) |
Symmetry codes: (i) x+1/2, −y+3/2, z+1/2; (ii) −x+3/2, y+1/2, −z+3/2; (iii) −x+3/2, y−1/2, −z+1/2; (iv) −x+1, −y+1, −z+1; (v) −x+3/2, y−1/2, −z+3/2. |
Experimental details
Crystal data | |
Chemical formula | [Ru(C12H7Br2N2)2(CO)2] |
Mr | 835.11 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 200 |
a, b, c (Å) | 13.5277 (2), 12.4006 (3), 15.6585 (2) |
β (°) | 93.176 (1) |
V (Å3) | 2622.70 (8) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 6.73 |
Crystal size (mm) | 0.38 × 0.21 × 0.14 |
Data collection | |
Diffractometer | Nonius KappaCCD diffractometer |
Absorption correction | Integration (Coppens, 1970) |
Tmin, Tmax | 0.192, 0.497 |
No. of measured, independent and observed [I > 3σ(I)] reflections | 49588, 5998, 4200 |
Rint | 0.05 |
(sin θ/λ)max (Å−1) | 0.650 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.025, 0.028, 1.09 |
No. of reflections | 4200 |
No. of parameters | 334 |
Δρmax, Δρmin (e Å−3) | 0.95, −0.75 |
Computer programs: COLLECT (Nonius, 1997), DENZO/SCALEPACK (Otwinowski & Minor, 1997), DENZO/SCALEPACK, SIR92 (Altomare et al., 1994), CRYSTALS (Betteridge et al., 2003), ORTEPII (Johnson, 1976) in TEXSAN (Molecular Structure Corporation, 1997), CRYSTALS.
Ru1—N11 | 2.071 (2) | Ru1—C2 | 1.956 (3) |
Ru1—N21 | 2.086 (2) | Ru1—C112 | 2.090 (3) |
Ru1—C1 | 1.957 (3) | Ru1—C212 | 2.093 (3) |
N11—Ru1—N21 | 165.18 (10) | C1—Ru1—C112 | 172.86 (12) |
N11—Ru1—C1 | 97.02 (12) | C2—Ru1—C112 | 85.23 (12) |
N21—Ru1—C1 | 91.87 (12) | N11—Ru1—C212 | 91.05 (11) |
N11—Ru1—C2 | 92.13 (11) | N21—Ru1—C212 | 76.88 (11) |
N21—Ru1—C2 | 98.29 (12) | C1—Ru1—C212 | 91.21 (13) |
C1—Ru1—C2 | 98.38 (14) | C2—Ru1—C212 | 169.44 (13) |
N11—Ru1—C112 | 76.62 (11) | C112—Ru1—C212 | 85.72 (11) |
N21—Ru1—C112 | 93.71 (11) |
The title compound (I) has been prepared as a minor product from the reaction of Ru3(CO)12 and 4,4'-dibromoazobenzene in refluxing n-octane; the major product is the cluster complex Ru3(µ3-NC6H4Br)2(CO)9 (Willis et al., 2005). Two strong ν(CO) absorptions at 2047 and 1984 cm−1 in the IR spectrum of (I) are consistent with the presence of two mutually cis carbonyl groups. The crystal structure was investigated to ascertain the relative dispositions of the remaining C and N donor atoms of the two cyclometallated 4,4'-dibromoazobenzene ligands.
The complex possesses a distorted octahedral coordination at the Ru atom and the X-ray study confirms the cis-disposed carbonyl ligands (Fig. 1). The N atoms of the cyclometallated azobenzene ligands are mutually trans, and the aryl C atoms are trans to the carbonyl ligands.
For ruthenium complexes of this type, i.e. with cis monodentate ligands and two N,C-cyclometallated ligands, three different arrangements of the cyclometallated donor atoms are possible. An analogue containing azobenzene residues Ru(C6H4N=NPh)2(CO)2 (Bruce et al., 1987) and a further minor product from the present reaction (Willis et al., 2006) possesses one configuration, in which one N atom is trans to an aryl C, while the other N atom is trans to a carbonyl ligand, with the other aryl C trans to the remaining carbonyl ligand. The second possibility, in which each of the N atoms is trans to a carbonyl ligand, is seen in Ru(C13H8N)2(CO)2 (Patrick et al., 1983). Compound (I) has the third configuration, not previously observed for ruthenium complexes with ligands of this type.