Acta Cryst. (2010). E66, m1494 [ doi:10.1107/S1600536810043679 ]
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2P,P']tetracarbonylchromium(0)The title compound, [Cr(C26H26P2Si)(CO)4], was obtained by the reaction of Ph2PSiMe2PPh2 with Cr(CO)6 in refluxing toluene by ligand exchange. The CrC4P2 coordination geometry at the Cr atom is distorted octahedral, with a P-Cr-P bite angle of 80.27 (1)°.
Cr(CO)6 (175 mg, 0.8 mmol) was added to a solution of Ph2PSiMe2PPh2 (321 mg, 0.75 mmol) in 20 ml of toluene and the resulting solution was stirred at reflux temperature for 72 h. Subsequently, the formed yellow solution was cooled down to 0°C and filtered. Toluene was removed in vacuum and the product was extracted with dichloromethane. The major part of dichloromethane was removed and the remaining solution was over-layered with n-hexane to get single crystals of the title compound. The yellow compound was fully characterized by standard analytical methods e.g. 31P NMR: (CD2Cl2): 5.9 p.p.m.
All H atoms were placed in idealized positions with d(C—H) = 0.98 (CH3) and 0.95 Å (CH) and refined using a riding model with Uiso(H) fixed at 1.5 Ueq(C) for CH3 and 1.2 Ueq(C) for CH.
Data collection: X-AREA (Stoe & Cie, 2005); cell refinement: X-AREA (Stoe & Cie, 2005); data reduction: X-AREA (Stoe & Cie, 2005); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).
![[Figure 1]](./cv2781fig1thm.gif)
| Fig. 1. The molecular structure of the title compound showing the atom-labelling scheme. H atoms are omitted for clarity. Displacement ellipsoids are drawn at the 30% probability level. |
| [Cr(C26H26P2Si)(CO)4] | F(000) = 1224 |
| Mr = 592.54 | Dx = 1.351 Mg m−3 |
| Monoclinic, P21/c | Mo Kα radiation, λ = 0.71073 Å |
| Hall symbol: -P 2ybc | Cell parameters from 13232 reflections |
| a = 13.7832 (4) Å | θ = 2.0–29.6° |
| b = 11.9204 (2) Å | µ = 0.58 mm−1 |
| c = 18.1329 (5) Å | T = 200 K |
| β = 102.073 (2)° | Prism, yellow |
| V = 2913.36 (13) Å3 | 0.45 × 0.40 × 0.38 mm |
| Z = 4 |
| Stoe IPDS II diffractometer | 6688 independent reflections |
| Radiation source: fine-focus sealed tube | 5370 reflections with I > 2σ(I) |
| graphite | Rint = 0.032 |
| ω scans | θmax = 27.5°, θmin = 2.1° |
| Absorption correction: numerical (X-SHAPE and X-RED32; Stoe & Cie, 2005) | h = −17→17 |
| Tmin = 0.773, Tmax = 0.867 | k = −15→15 |
| 47168 measured reflections | l = −23→23 |
| Refinement on F2 | Primary atom site location: structure-invariant direct methods |
| Least-squares matrix: full | Secondary atom site location: difference Fourier map |
| R[F2 > 2σ(F2)] = 0.026 | Hydrogen site location: inferred from neighbouring sites |
| wR(F2) = 0.065 | H-atom parameters constrained |
| S = 0.93 | w = 1/[σ2(Fo2) + (0.0437P)2] where P = (Fo2 + 2Fc2)/3 |
| 6688 reflections | (Δ/σ)max = 0.001 |
| 345 parameters | Δρmax = 0.32 e Å−3 |
| 6 restraints | Δρmin = −0.33 e Å−3 |
| [Cr(C26H26P2Si)(CO)4] | V = 2913.36 (13) Å3 |
| Mr = 592.54 | Z = 4 |
| Monoclinic, P21/c | Mo Kα radiation |
| a = 13.7832 (4) Å | µ = 0.58 mm−1 |
| b = 11.9204 (2) Å | T = 200 K |
| c = 18.1329 (5) Å | 0.45 × 0.40 × 0.38 mm |
| β = 102.073 (2)° |
| Stoe IPDS II diffractometer | 6688 independent reflections |
| Absorption correction: numerical (X-SHAPE and X-RED32; Stoe & Cie, 2005) | 5370 reflections with I > 2σ(I) |
| Tmin = 0.773, Tmax = 0.867 | Rint = 0.032 |
| 47168 measured reflections | θmax = 27.5° |
| R[F2 > 2σ(F2)] = 0.026 | H-atom parameters constrained |
| wR(F2) = 0.065 | Δρmax = 0.32 e Å−3 |
| S = 0.93 | Δρmin = −0.33 e Å−3 |
| 6688 reflections | Absolute structure: ? |
| 345 parameters | Flack parameter: ? |
| 6 restraints | Rogers parameter: ? |
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. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger. |
| x | y | z | Uiso*/Ueq | ||
| C1 | 0.25499 (13) | 0.34671 (15) | 0.23882 (9) | 0.0452 (4) | |
| H1A | 0.2964 | 0.3105 | 0.2079 | 0.068* | |
| H1B | 0.2941 | 0.4035 | 0.2711 | 0.068* | |
| H1C | 0.1979 | 0.3826 | 0.2060 | 0.068* | |
| C2 | 0.13677 (12) | 0.12988 (15) | 0.23902 (10) | 0.0445 (4) | |
| H2A | 0.0795 | 0.1647 | 0.2057 | 0.067* | |
| H2B | 0.1136 | 0.0746 | 0.2714 | 0.067* | |
| H2C | 0.1782 | 0.0926 | 0.2086 | 0.067* | |
| C3 | 0.37225 (9) | 0.03094 (13) | 0.35878 (8) | 0.0312 (3) | |
| C4 | 0.38402 (12) | −0.06394 (13) | 0.40336 (10) | 0.0411 (4) | |
| H4 | 0.3647 | −0.0619 | 0.4507 | 0.049* | |
| C5 | 0.42314 (14) | −0.16177 (14) | 0.38092 (10) | 0.0525 (4) | |
| H5 | 0.4309 | −0.2259 | 0.4127 | 0.063* | |
| C6 | 0.45082 (13) | −0.16610 (15) | 0.31233 (9) | 0.0535 (5) | |
| H6 | 0.4776 | −0.2332 | 0.2965 | 0.064* | |
| C7 | 0.43945 (13) | −0.07262 (14) | 0.26685 (10) | 0.0553 (5) | |
| H7 | 0.4588 | −0.0753 | 0.2196 | 0.066* | |
| C8 | 0.40018 (12) | 0.02518 (15) | 0.28928 (9) | 0.0442 (4) | |
| H8 | 0.3922 | 0.0889 | 0.2571 | 0.053* | |
| C9 | 0.43399 (9) | 0.25333 (12) | 0.40684 (7) | 0.0277 (3) | |
| C10 | 0.52916 (10) | 0.20972 (14) | 0.41518 (9) | 0.0378 (3) | |
| H10 | 0.5384 | 0.1311 | 0.4113 | 0.045* | |
| C11 | 0.61087 (11) | 0.28078 (16) | 0.42918 (10) | 0.0455 (4) | |
| H11 | 0.6758 | 0.2503 | 0.4358 | 0.055* | |
| C12 | 0.59842 (12) | 0.39468 (16) | 0.43350 (9) | 0.0438 (4) | |
| H12 | 0.6546 | 0.4428 | 0.4432 | 0.053* | |
| C13 | 0.50415 (12) | 0.43899 (14) | 0.42375 (9) | 0.0386 (3) | |
| H13 | 0.4952 | 0.5179 | 0.4251 | 0.046* | |
| C14 | 0.42244 (10) | 0.36853 (13) | 0.41193 (8) | 0.0330 (3) | |
| H14 | 0.3579 | 0.3994 | 0.4073 | 0.040* | |
| C15 | 0.13366 (9) | 0.43218 (12) | 0.41500 (8) | 0.0302 (3) | |
| C16 | 0.14302 (13) | 0.51650 (14) | 0.36418 (10) | 0.0456 (4) | |
| H16 | 0.1494 | 0.4976 | 0.3145 | 0.055* | |
| C17 | 0.14317 (15) | 0.62837 (15) | 0.38556 (12) | 0.0561 (5) | |
| H17 | 0.1496 | 0.6854 | 0.3503 | 0.067* | |
| C18 | 0.13416 (12) | 0.65736 (14) | 0.45713 (12) | 0.0493 (4) | |
| H18 | 0.1344 | 0.7341 | 0.4714 | 0.059* | |
| C19 | 0.12477 (12) | 0.57488 (15) | 0.50772 (10) | 0.0446 (4) | |
| H19 | 0.1183 | 0.5946 | 0.5572 | 0.053* | |
| C20 | 0.12470 (10) | 0.46281 (13) | 0.48722 (9) | 0.0355 (3) | |
| H20 | 0.1185 | 0.4064 | 0.5229 | 0.043* | |
| C21 | −0.00463 (9) | 0.25993 (12) | 0.35370 (8) | 0.0291 (3) | |
| C22 | −0.06017 (11) | 0.33304 (14) | 0.30152 (9) | 0.0394 (3) | |
| H22 | −0.0289 | 0.3955 | 0.2837 | 0.047* | |
| C23 | −0.16100 (12) | 0.31502 (16) | 0.27540 (10) | 0.0466 (4) | |
| H23 | −0.1985 | 0.3656 | 0.2401 | 0.056* | |
| C24 | −0.20685 (11) | 0.22462 (16) | 0.30030 (10) | 0.0466 (4) | |
| H24 | −0.2760 | 0.2130 | 0.2825 | 0.056* | |
| C25 | −0.15301 (11) | 0.15113 (16) | 0.35085 (11) | 0.0479 (4) | |
| H25 | −0.1847 | 0.0880 | 0.3675 | 0.058* | |
| C26 | −0.05175 (11) | 0.16869 (14) | 0.37797 (9) | 0.0392 (3) | |
| H26 | −0.0149 | 0.1177 | 0.4133 | 0.047* | |
| C27 | 0.29769 (10) | 0.06277 (12) | 0.55229 (8) | 0.0303 (3) | |
| C28 | 0.16332 (10) | 0.02616 (13) | 0.43194 (9) | 0.0353 (3) | |
| C29 | 0.12597 (10) | 0.16240 (13) | 0.54054 (8) | 0.0340 (3) | |
| C30 | 0.29387 (10) | 0.27186 (13) | 0.53968 (8) | 0.0318 (3) | |
| Cr1 | 0.221253 (14) | 0.156127 (18) | 0.482132 (12) | 0.02433 (6) | |
| O1 | 0.34093 (8) | 0.00645 (10) | 0.59947 (6) | 0.0440 (3) | |
| O2 | 0.13246 (10) | −0.05665 (11) | 0.40470 (8) | 0.0575 (3) | |
| O3 | 0.06848 (9) | 0.16388 (12) | 0.57808 (7) | 0.0554 (3) | |
| O4 | 0.34046 (9) | 0.33533 (10) | 0.57916 (7) | 0.0500 (3) | |
| P1 | 0.32570 (2) | 0.16071 (3) | 0.392418 (19) | 0.02575 (8) | |
| P2 | 0.12811 (2) | 0.28288 (3) | 0.39145 (2) | 0.02589 (8) | |
| Si1 | 0.21062 (3) | 0.23959 (3) | 0.29856 (2) | 0.02921 (9) |
| U11 | U22 | U33 | U12 | U13 | U23 | |
| C1 | 0.0530 (9) | 0.0510 (10) | 0.0323 (8) | −0.0054 (8) | 0.0102 (7) | 0.0108 (7) |
| C2 | 0.0419 (8) | 0.0442 (10) | 0.0423 (9) | −0.0046 (7) | −0.0029 (7) | −0.0077 (7) |
| C3 | 0.0247 (6) | 0.0372 (8) | 0.0317 (7) | −0.0008 (5) | 0.0059 (5) | −0.0067 (6) |
| C4 | 0.0453 (8) | 0.0373 (9) | 0.0439 (9) | 0.0068 (7) | 0.0163 (7) | −0.0026 (7) |
| C5 | 0.0559 (10) | 0.0401 (10) | 0.0636 (12) | 0.0125 (8) | 0.0175 (9) | −0.0059 (9) |
| C6 | 0.0445 (9) | 0.0551 (12) | 0.0605 (11) | 0.0092 (8) | 0.0098 (8) | −0.0249 (9) |
| C7 | 0.0479 (9) | 0.0807 (14) | 0.0400 (9) | 0.0054 (9) | 0.0151 (7) | −0.0227 (10) |
| C8 | 0.0421 (8) | 0.0581 (11) | 0.0341 (8) | 0.0032 (7) | 0.0118 (6) | −0.0048 (8) |
| C9 | 0.0248 (6) | 0.0349 (8) | 0.0238 (6) | −0.0035 (5) | 0.0063 (5) | −0.0002 (5) |
| C10 | 0.0285 (7) | 0.0390 (9) | 0.0449 (9) | 0.0006 (6) | 0.0058 (6) | 0.0002 (7) |
| C11 | 0.0256 (7) | 0.0560 (11) | 0.0543 (10) | −0.0031 (7) | 0.0069 (7) | −0.0009 (8) |
| C12 | 0.0358 (8) | 0.0536 (11) | 0.0423 (9) | −0.0163 (7) | 0.0091 (6) | −0.0058 (8) |
| C13 | 0.0454 (8) | 0.0366 (9) | 0.0355 (8) | −0.0089 (6) | 0.0121 (6) | −0.0067 (6) |
| C14 | 0.0309 (7) | 0.0380 (8) | 0.0313 (7) | −0.0009 (6) | 0.0089 (5) | −0.0038 (6) |
| C15 | 0.0233 (6) | 0.0259 (7) | 0.0396 (8) | 0.0006 (5) | 0.0024 (5) | 0.0016 (6) |
| C16 | 0.0587 (10) | 0.0330 (9) | 0.0449 (9) | −0.0010 (7) | 0.0102 (8) | 0.0067 (7) |
| C17 | 0.0694 (12) | 0.0301 (9) | 0.0673 (13) | −0.0016 (8) | 0.0110 (10) | 0.0113 (8) |
| C18 | 0.0420 (9) | 0.0285 (8) | 0.0741 (13) | 0.0022 (7) | 0.0047 (8) | −0.0062 (8) |
| C19 | 0.0377 (8) | 0.0407 (9) | 0.0547 (10) | 0.0033 (7) | 0.0084 (7) | −0.0117 (8) |
| C20 | 0.0326 (7) | 0.0326 (8) | 0.0420 (8) | 0.0011 (6) | 0.0090 (6) | −0.0003 (6) |
| C21 | 0.0233 (6) | 0.0309 (7) | 0.0327 (7) | 0.0015 (5) | 0.0050 (5) | −0.0012 (6) |
| C22 | 0.0331 (7) | 0.0380 (9) | 0.0441 (9) | 0.0013 (6) | 0.0012 (6) | 0.0060 (7) |
| C23 | 0.0339 (8) | 0.0514 (11) | 0.0486 (10) | 0.0068 (7) | −0.0049 (7) | 0.0029 (8) |
| C24 | 0.0256 (7) | 0.0601 (11) | 0.0510 (9) | −0.0017 (7) | 0.0015 (6) | −0.0074 (8) |
| C25 | 0.0309 (7) | 0.0517 (11) | 0.0605 (11) | −0.0099 (7) | 0.0080 (7) | 0.0045 (9) |
| C26 | 0.0295 (7) | 0.0384 (9) | 0.0481 (9) | −0.0022 (6) | 0.0044 (6) | 0.0072 (7) |
| C27 | 0.0280 (6) | 0.0306 (7) | 0.0345 (7) | 0.0031 (5) | 0.0119 (5) | 0.0025 (6) |
| C28 | 0.0300 (7) | 0.0318 (8) | 0.0452 (8) | −0.0014 (6) | 0.0104 (6) | 0.0039 (7) |
| C29 | 0.0270 (6) | 0.0393 (8) | 0.0356 (7) | 0.0043 (6) | 0.0064 (6) | 0.0072 (6) |
| C30 | 0.0320 (7) | 0.0318 (8) | 0.0325 (7) | 0.0022 (6) | 0.0085 (6) | 0.0040 (6) |
| Cr1 | 0.02209 (10) | 0.02451 (11) | 0.02716 (11) | 0.00111 (8) | 0.00691 (7) | 0.00371 (9) |
| O1 | 0.0445 (6) | 0.0457 (7) | 0.0418 (6) | 0.0156 (5) | 0.0093 (5) | 0.0138 (5) |
| O2 | 0.0552 (7) | 0.0373 (7) | 0.0805 (9) | −0.0142 (6) | 0.0154 (7) | −0.0111 (6) |
| O3 | 0.0383 (6) | 0.0841 (10) | 0.0499 (7) | 0.0068 (6) | 0.0230 (5) | 0.0083 (7) |
| O4 | 0.0540 (7) | 0.0442 (7) | 0.0476 (7) | −0.0103 (6) | 0.0007 (5) | −0.0063 (6) |
| P1 | 0.02266 (15) | 0.02917 (18) | 0.02576 (16) | −0.00015 (13) | 0.00579 (12) | 0.00080 (14) |
| P2 | 0.02295 (15) | 0.02462 (18) | 0.02950 (17) | 0.00002 (12) | 0.00413 (12) | 0.00330 (14) |
| Si1 | 0.02813 (18) | 0.0322 (2) | 0.02609 (18) | −0.00233 (15) | 0.00286 (14) | 0.00240 (15) |
| C1—Si1 | 1.8588 (16) | C15—P2 | 1.8281 (15) |
| C1—H1A | 0.9800 | C16—C17 | 1.389 (3) |
| C1—H1B | 0.9800 | C16—H16 | 0.9500 |
| C1—H1C | 0.9800 | C17—C18 | 1.373 (3) |
| C2—Si1 | 1.8580 (16) | C17—H17 | 0.9500 |
| C2—H2A | 0.9800 | C18—C19 | 1.369 (3) |
| C2—H2B | 0.9800 | C18—H18 | 0.9500 |
| C2—H2C | 0.9800 | C19—C20 | 1.387 (2) |
| C3—C4 | 1.380 (2) | C19—H19 | 0.9500 |
| C3—C8 | 1.394 (2) | C20—H20 | 0.9500 |
| C3—P1 | 1.8277 (15) | C21—C26 | 1.385 (2) |
| C4—C5 | 1.3813 (14) | C21—C22 | 1.392 (2) |
| C4—H4 | 0.9500 | C21—P2 | 1.8350 (13) |
| C5—C6 | 1.3760 (15) | C22—C23 | 1.388 (2) |
| C5—H5 | 0.9500 | C22—H22 | 0.9500 |
| C6—C7 | 1.3756 (15) | C23—C24 | 1.373 (3) |
| C6—H6 | 0.9500 | C23—H23 | 0.9500 |
| C7—C8 | 1.3818 (15) | C24—C25 | 1.369 (3) |
| C7—H7 | 0.9500 | C24—H24 | 0.9500 |
| C8—H8 | 0.9500 | C25—C26 | 1.395 (2) |
| C9—C14 | 1.388 (2) | C25—H25 | 0.9500 |
| C9—C10 | 1.3896 (19) | C26—H26 | 0.9500 |
| C9—P1 | 1.8308 (13) | C27—O1 | 1.1509 (17) |
| C10—C11 | 1.389 (2) | C27—Cr1 | 1.8455 (14) |
| C10—H10 | 0.9500 | C28—O2 | 1.1452 (19) |
| C11—C12 | 1.373 (3) | C28—Cr1 | 1.8874 (16) |
| C11—H11 | 0.9500 | C29—O3 | 1.1477 (18) |
| C12—C13 | 1.379 (2) | C29—Cr1 | 1.8530 (14) |
| C12—H12 | 0.9500 | C30—O4 | 1.1424 (18) |
| C13—C14 | 1.385 (2) | C30—Cr1 | 1.8860 (15) |
| C13—H13 | 0.9500 | Cr1—P1 | 2.3877 (4) |
| C14—H14 | 0.9500 | Cr1—P2 | 2.3983 (4) |
| C15—C16 | 1.388 (2) | P1—Si1 | 2.2731 (5) |
| C15—C20 | 1.390 (2) | P2—Si1 | 2.2798 (5) |
| Si1—C1—H1A | 109.5 | C18—C19—H19 | 119.8 |
| Si1—C1—H1B | 109.5 | C20—C19—H19 | 119.8 |
| H1A—C1—H1B | 109.5 | C19—C20—C15 | 120.70 (15) |
| Si1—C1—H1C | 109.5 | C19—C20—H20 | 119.7 |
| H1A—C1—H1C | 109.5 | C15—C20—H20 | 119.7 |
| H1B—C1—H1C | 109.5 | C26—C21—C22 | 118.69 (13) |
| Si1—C2—H2A | 109.5 | C26—C21—P2 | 119.72 (11) |
| Si1—C2—H2B | 109.5 | C22—C21—P2 | 121.59 (11) |
| H2A—C2—H2B | 109.5 | C23—C22—C21 | 120.26 (15) |
| Si1—C2—H2C | 109.5 | C23—C22—H22 | 119.9 |
| H2A—C2—H2C | 109.5 | C21—C22—H22 | 119.9 |
| H2B—C2—H2C | 109.5 | C24—C23—C22 | 120.42 (15) |
| C4—C3—C8 | 117.93 (14) | C24—C23—H23 | 119.8 |
| C4—C3—P1 | 120.31 (11) | C22—C23—H23 | 119.8 |
| C8—C3—P1 | 121.72 (12) | C25—C24—C23 | 120.02 (14) |
| C3—C4—C5 | 121.64 (15) | C25—C24—H24 | 120.0 |
| C3—C4—H4 | 119.2 | C23—C24—H24 | 120.0 |
| C5—C4—H4 | 119.2 | C24—C25—C26 | 120.15 (16) |
| C6—C5—C4 | 119.81 (17) | C24—C25—H25 | 119.9 |
| C6—C5—H5 | 120.1 | C26—C25—H25 | 119.9 |
| C4—C5—H5 | 120.1 | C21—C26—C25 | 120.45 (15) |
| C7—C6—C5 | 119.55 (16) | C21—C26—H26 | 119.8 |
| C7—C6—H6 | 120.2 | C25—C26—H26 | 119.8 |
| C5—C6—H6 | 120.2 | O1—C27—Cr1 | 175.10 (12) |
| C6—C7—C8 | 120.63 (16) | O2—C28—Cr1 | 175.62 (14) |
| C6—C7—H7 | 119.7 | O3—C29—Cr1 | 177.97 (14) |
| C8—C7—H7 | 119.7 | O4—C30—Cr1 | 174.21 (13) |
| C7—C8—C3 | 120.44 (16) | C27—Cr1—C29 | 90.06 (6) |
| C7—C8—H8 | 119.8 | C27—Cr1—C30 | 84.22 (6) |
| C3—C8—H8 | 119.8 | C29—Cr1—C30 | 90.67 (6) |
| C14—C9—C10 | 118.80 (13) | C27—Cr1—C28 | 87.73 (7) |
| C14—C9—P1 | 120.32 (10) | C29—Cr1—C28 | 91.71 (7) |
| C10—C9—P1 | 120.85 (11) | C30—Cr1—C28 | 171.61 (6) |
| C11—C10—C9 | 120.16 (15) | C27—Cr1—P1 | 98.33 (4) |
| C11—C10—H10 | 119.9 | C29—Cr1—P1 | 171.42 (4) |
| C9—C10—H10 | 119.9 | C30—Cr1—P1 | 91.97 (4) |
| C12—C11—C10 | 120.47 (15) | C28—Cr1—P1 | 86.83 (5) |
| C12—C11—H11 | 119.8 | C27—Cr1—P2 | 177.47 (5) |
| C10—C11—H11 | 119.8 | C29—Cr1—P2 | 91.42 (4) |
| C11—C12—C13 | 119.81 (14) | C30—Cr1—P2 | 93.70 (4) |
| C11—C12—H12 | 120.1 | C28—Cr1—P2 | 94.28 (5) |
| C13—C12—H12 | 120.1 | P1—Cr1—P2 | 80.270 (13) |
| C12—C13—C14 | 120.08 (15) | C3—P1—C9 | 103.03 (6) |
| C12—C13—H13 | 120.0 | C3—P1—Si1 | 109.81 (5) |
| C14—C13—H13 | 120.0 | C9—P1—Si1 | 106.13 (5) |
| C13—C14—C9 | 120.63 (14) | C3—P1—Cr1 | 120.78 (5) |
| C13—C14—H14 | 119.7 | C9—P1—Cr1 | 120.41 (4) |
| C9—C14—H14 | 119.7 | Si1—P1—Cr1 | 95.386 (16) |
| C16—C15—C20 | 118.32 (14) | C15—P2—C21 | 102.83 (6) |
| C16—C15—P2 | 123.72 (12) | C15—P2—Si1 | 112.95 (5) |
| C20—C15—P2 | 117.92 (11) | C21—P2—Si1 | 107.65 (5) |
| C15—C16—C17 | 120.34 (17) | C15—P2—Cr1 | 117.58 (5) |
| C15—C16—H16 | 119.8 | C21—P2—Cr1 | 120.72 (5) |
| C17—C16—H16 | 119.8 | Si1—P2—Cr1 | 94.919 (16) |
| C18—C17—C16 | 120.68 (17) | C2—Si1—C1 | 110.61 (8) |
| C18—C17—H17 | 119.7 | C2—Si1—P1 | 110.83 (6) |
| C16—C17—H17 | 119.7 | C1—Si1—P1 | 117.22 (6) |
| C19—C18—C17 | 119.50 (16) | C2—Si1—P2 | 106.93 (6) |
| C19—C18—H18 | 120.3 | C1—Si1—P2 | 123.42 (6) |
| C17—C18—H18 | 120.3 | P1—Si1—P2 | 85.312 (17) |
| C18—C19—C20 | 120.47 (17) |
This work was supported by the Leibniz-Institut für Katalyse e.V. an der Universität Rostock.
Chen, T., Jackson, J., Jasper, S. A., Duesler, E. N., Nöth, H. & Paine, R. T. (1999). J. Organomet. Chem. 582, 25–31.
Hassler, K. & Seidl, S. (1988). Monatsh. Chem. 119, 1241–1244.
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Stoe & Cie (2005). X-SHAPE, X-RED32 and X-AREA. Stoe & Cie, Darmstadt, Germany.
Disphosphines are widely used as chelate ligands for complex formation. Among them the silicon-bridged species are not common. There are only few examples of structurally characterized complexes with a SiMe2 bridge (Chen et al., 1999) or SiMe2SiMe2 bridge (Sheldrick & Borkenstein, 1977). In the present publication, we report on the formation and molecular structure of the title compound, which was observed to be the single product of a complex formation of Ph2PSiMe2PPh2 with Cr(CO)6. The synthesis of the starting ligand was already reported by Hassler & Seidl (1988).
In the molecular structure of the title complex the chelating disphosphine and four carbonyl ligands are coordinated to the Cr atom (Fig. 1). The coordination geometry at the metal center is best described as distorted octahedral. The observed bite angle P—Cr—P is 80.27 (1)° and the P—Si—P angle of the complexed ligand is 85.31 (2)°.