metal-organic compounds
Bis(μ-diisopropylphosphanido-κ2P:P)bis[hydrido(triisopropylphosphane-κP)platinum(II)]
aInstitut für Anorganische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
*Correspondence e-mail: h.braunschweig@mail.uni-wuerzburg.de
In the centrosymmetric molecular structure of the title compound [Pt2(C6H14P)2H2(C9H21P)2], each PtII atom is bound on one side to a phosphane ligand (PiPr3) and a hydrido ligand. On the other side, it is bound to two phosphanide ligands (μ-PiPr2), which engage a bridging position between the two PtII atoms, forming a distorted square-planar structure motif. The Pt⋯Pt distance is 3.6755 (2) Å. A comparable molecular structure was observed for bis(μ-di-tert-butylphosphanido)bis[hydrido(triethylphosphane)platinum(II)] [Itazaki et al. (2004). Organometallics, 23, 1610–1621].
Related literature
For the syntheses of similar phosphido-bridged complexes of platinum(II) with phosphine ligands, see: Itazaki et al. (2004) or with other ligands such as carbonyl, see: Albinati et al. (2008). For Pt—H bond lengths in related structures, see: Chiang et al. (1984); Knobler et al. (1983).
Experimental
Crystal data
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Data collection: APEX2 (Bruker, 2010); cell SAINT-Plus (Bruker, 2010); data reduction: SAINT-Plus; 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.
Supporting information
10.1107/S1600536812022829/hp2036sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536812022829/hp2036Isup2.hkl
Bis(tri-iso-propylphosphine)platinum (50.0 mg, 0.09 mmol) dissolved in 1 ml benzene was added to a solution of dichloro(2,3,5,6-tetramethylphenyl)borane (29.5 mg, 0.09 mmol) in 1 ml benzene. The solvent was removed under reduced pressure and the obtained dark brown residue was disolved in hexanes. The title compound was obtained as a off-white solid. Colourless crystals suitable for X-ray analysis were grown from a hexanes solution at 238 K.
The H atoms were placed at idealized positions and treatet as riding atoms: C–H = 0.98 Å (CH3), 1.00 Å (aliphatic H-atoms). Uiso(H) values were fixed at 1.5 times (for primary H atoms) and 1.2 times (tertiary H atoms) Ueq of the attached C atoms.
Data collection: APEX2 (Bruker, 2010); cell
SAINT-Plus (Bruker, 2010); data reduction: SAINT-Plus (Bruker, 2010); 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).[Pt2(C6H14P)2H2(C9H21P)2] | F(000) = 936 |
Mr = 946.94 | Dx = 1.697 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 8162 reflections |
a = 8.8301 (3) Å | θ = 2.7–26.7° |
b = 14.8153 (5) Å | µ = 7.73 mm−1 |
c = 14.1688 (5) Å | T = 100 K |
β = 90.097 (2)° | Needle, colourless |
V = 1853.57 (11) Å3 | 0.53 × 0.13 × 0.11 mm |
Z = 2 |
Bruker X8 APEXII diffractometer | 3943 independent reflections |
Radiation source: rotating anode | 3478 reflections with I > 2σ(I) |
Multi-layer mirror monochromator | Rint = 0.051 |
Detector resolution: 8.333 pixels mm-1 | θmax = 26.8°, θmin = 2.0° |
ϕ and ω scans | h = −11→11 |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | k = −18→18 |
Tmin = 0.360, Tmax = 0.745 | l = −17→17 |
38282 measured reflections |
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)] = 0.018 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.038 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0141P)2 + 0.9947P] where P = (Fo2 + 2Fc2)/3 |
3943 reflections | (Δ/σ)max = 0.009 |
177 parameters | Δρmax = 0.72 e Å−3 |
0 restraints | Δρmin = −0.66 e Å−3 |
[Pt2(C6H14P)2H2(C9H21P)2] | V = 1853.57 (11) Å3 |
Mr = 946.94 | Z = 2 |
Monoclinic, P21/n | Mo Kα radiation |
a = 8.8301 (3) Å | µ = 7.73 mm−1 |
b = 14.8153 (5) Å | T = 100 K |
c = 14.1688 (5) Å | 0.53 × 0.13 × 0.11 mm |
β = 90.097 (2)° |
Bruker X8 APEXII diffractometer | 3943 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2008) | 3478 reflections with I > 2σ(I) |
Tmin = 0.360, Tmax = 0.745 | Rint = 0.051 |
38282 measured reflections |
R[F2 > 2σ(F2)] = 0.018 | 0 restraints |
wR(F2) = 0.038 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.03 | Δρmax = 0.72 e Å−3 |
3943 reflections | Δρmin = −0.66 e Å−3 |
177 parameters |
Experimental. The crystal was immersed in a film of perfluoropolyether oil, mounted on a polyimide microloop (MicroMounts of MiTeGen) and transferred to stream of cold nitrogen (Oxford Cryostream 700). |
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 | ||
Pt1 | 0.068246 (11) | 1.032840 (7) | 0.882448 (6) | 0.00916 (4) | |
P3 | 0.15611 (8) | 0.99092 (5) | 0.73662 (5) | 0.01104 (15) | |
C4 | 0.0188 (3) | 1.01911 (19) | 0.64139 (19) | 0.0155 (6) | |
H4 | 0.0570 | 0.9925 | 0.5811 | 0.019* | |
C5 | −0.1344 (3) | 0.9764 (2) | 0.6632 (2) | 0.0230 (7) | |
H5A | −0.1717 | 0.9993 | 0.7238 | 0.034* | |
H5B | −0.1233 | 0.9107 | 0.6667 | 0.034* | |
H5C | −0.2067 | 0.9918 | 0.6132 | 0.034* | |
C6 | 0.0005 (3) | 1.1205 (2) | 0.6271 (2) | 0.0218 (7) | |
H6A | −0.0818 | 1.1318 | 0.5822 | 0.033* | |
H6B | 0.0951 | 1.1457 | 0.6023 | 0.033* | |
H6C | −0.0234 | 1.1491 | 0.6876 | 0.033* | |
C7 | 0.3257 (3) | 1.05748 (19) | 0.70284 (18) | 0.0141 (6) | |
H7 | 0.2888 | 1.1209 | 0.6953 | 0.017* | |
C8 | 0.3981 (3) | 1.0330 (2) | 0.60752 (19) | 0.0195 (7) | |
H8A | 0.4768 | 1.0773 | 0.5921 | 0.029* | |
H8B | 0.3202 | 1.0334 | 0.5581 | 0.029* | |
H8C | 0.4434 | 0.9727 | 0.6116 | 0.029* | |
C9 | 0.4449 (3) | 1.0616 (2) | 0.7817 (2) | 0.0199 (7) | |
H9A | 0.4974 | 1.0034 | 0.7859 | 0.030* | |
H9B | 0.3951 | 1.0747 | 0.8419 | 0.030* | |
H9C | 0.5184 | 1.1093 | 0.7675 | 0.030* | |
C10 | 0.1983 (3) | 0.86919 (18) | 0.71777 (19) | 0.0156 (6) | |
H10 | 0.1209 | 0.8361 | 0.7558 | 0.019* | |
C11 | 0.3510 (3) | 0.8423 (2) | 0.7605 (2) | 0.0212 (7) | |
H11A | 0.3587 | 0.7763 | 0.7627 | 0.032* | |
H11B | 0.3591 | 0.8667 | 0.8246 | 0.032* | |
H11C | 0.4331 | 0.8666 | 0.7215 | 0.032* | |
C12 | 0.1825 (4) | 0.8318 (2) | 0.6177 (2) | 0.0235 (7) | |
H12A | 0.2552 | 0.8620 | 0.5761 | 0.035* | |
H12B | 0.0794 | 0.8427 | 0.5946 | 0.035* | |
H12C | 0.2028 | 0.7668 | 0.6181 | 0.035* | |
P13 | 0.00800 (7) | 0.90365 (5) | 0.97455 (5) | 0.01004 (14) | |
C14 | −0.1496 (3) | 0.82851 (18) | 0.93640 (18) | 0.0141 (6) | |
H14 | −0.1686 | 0.7858 | 0.9897 | 0.017* | |
C15 | −0.2950 (3) | 0.8827 (2) | 0.9230 (2) | 0.0220 (7) | |
H15A | −0.2809 | 0.9267 | 0.8721 | 0.033* | |
H15B | −0.3194 | 0.9145 | 0.9817 | 0.033* | |
H15C | −0.3782 | 0.8418 | 0.9066 | 0.033* | |
C16 | −0.1193 (3) | 0.7706 (2) | 0.8494 (2) | 0.0197 (7) | |
H16A | −0.2015 | 0.7268 | 0.8415 | 0.030* | |
H16B | −0.0231 | 0.7385 | 0.8573 | 0.030* | |
H16C | −0.1139 | 0.8094 | 0.7934 | 0.030* | |
C17 | 0.1654 (3) | 0.82156 (18) | 0.99243 (18) | 0.0129 (6) | |
H17 | 0.1924 | 0.7960 | 0.9293 | 0.015* | |
C18 | 0.1266 (3) | 0.7430 (2) | 1.0573 (2) | 0.0222 (7) | |
H18A | 0.2147 | 0.7032 | 1.0633 | 0.033* | |
H18B | 0.0414 | 0.7090 | 1.0307 | 0.033* | |
H18C | 0.0987 | 0.7662 | 1.1197 | 0.033* | |
C19 | 0.3042 (3) | 0.8713 (2) | 1.0303 (2) | 0.0216 (7) | |
H19A | 0.2810 | 0.8971 | 1.0923 | 0.032* | |
H19B | 0.3318 | 0.9199 | 0.9866 | 0.032* | |
H19C | 0.3890 | 0.8290 | 1.0362 | 0.032* | |
H2 | 0.099 (3) | 1.131 (2) | 0.845 (2) | 0.040 (9)* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Pt1 | 0.01140 (6) | 0.00952 (6) | 0.00656 (6) | 0.00047 (4) | 0.00126 (4) | −0.00011 (4) |
P3 | 0.0133 (4) | 0.0122 (4) | 0.0076 (3) | 0.0013 (3) | 0.0004 (3) | −0.0003 (3) |
C4 | 0.0205 (16) | 0.0180 (16) | 0.0081 (13) | 0.0010 (12) | −0.0003 (11) | −0.0021 (11) |
C5 | 0.0195 (17) | 0.0312 (19) | 0.0182 (15) | −0.0033 (14) | −0.0068 (13) | −0.0003 (13) |
C6 | 0.0242 (17) | 0.0225 (18) | 0.0187 (15) | 0.0058 (14) | −0.0075 (12) | 0.0020 (13) |
C7 | 0.0161 (15) | 0.0142 (15) | 0.0118 (14) | −0.0016 (12) | 0.0010 (11) | 0.0002 (11) |
C8 | 0.0206 (16) | 0.0240 (18) | 0.0140 (15) | −0.0027 (13) | 0.0056 (12) | 0.0024 (12) |
C9 | 0.0155 (16) | 0.0264 (17) | 0.0179 (15) | −0.0036 (13) | −0.0011 (12) | 0.0028 (13) |
C10 | 0.0203 (16) | 0.0105 (14) | 0.0160 (14) | 0.0000 (12) | 0.0059 (12) | −0.0014 (12) |
C11 | 0.0253 (17) | 0.0175 (17) | 0.0208 (16) | 0.0049 (13) | 0.0050 (13) | 0.0028 (13) |
C12 | 0.0338 (19) | 0.0163 (16) | 0.0204 (16) | 0.0022 (14) | 0.0037 (13) | −0.0076 (13) |
P13 | 0.0118 (4) | 0.0099 (3) | 0.0085 (3) | 0.0007 (3) | 0.0010 (3) | −0.0005 (3) |
C14 | 0.0178 (15) | 0.0125 (15) | 0.0121 (14) | −0.0047 (12) | 0.0017 (11) | −0.0003 (11) |
C15 | 0.0154 (16) | 0.0255 (18) | 0.0250 (16) | −0.0012 (13) | −0.0018 (12) | −0.0051 (14) |
C16 | 0.0186 (16) | 0.0195 (17) | 0.0209 (15) | −0.0076 (13) | 0.0024 (12) | −0.0062 (13) |
C17 | 0.0150 (15) | 0.0111 (15) | 0.0125 (13) | 0.0039 (11) | 0.0023 (11) | −0.0006 (11) |
C18 | 0.0283 (18) | 0.0182 (17) | 0.0201 (16) | 0.0104 (14) | 0.0030 (13) | 0.0050 (13) |
C19 | 0.0155 (16) | 0.0229 (17) | 0.0265 (17) | 0.0036 (13) | −0.0028 (12) | −0.0021 (14) |
Pt1—P3 | 2.2940 (7) | C11—H11A | 0.9800 |
Pt1—P13i | 2.3343 (7) | C11—H11B | 0.9800 |
Pt1—P13 | 2.3773 (7) | C11—H11C | 0.9800 |
Pt1—H2 | 1.57 (3) | C12—H12A | 0.9800 |
P3—C7 | 1.857 (3) | C12—H12B | 0.9800 |
P3—C4 | 1.860 (3) | C12—H12C | 0.9800 |
P3—C10 | 1.861 (3) | P13—C14 | 1.862 (3) |
C4—C6 | 1.524 (4) | P13—C17 | 1.864 (3) |
C4—C5 | 1.526 (4) | P13—Pt1i | 2.3343 (7) |
C4—H4 | 1.0000 | C14—C16 | 1.526 (4) |
C5—H5A | 0.9800 | C14—C15 | 1.526 (4) |
C5—H5B | 0.9800 | C14—H14 | 1.0000 |
C5—H5C | 0.9800 | C15—H15A | 0.9800 |
C6—H6A | 0.9800 | C15—H15B | 0.9800 |
C6—H6B | 0.9800 | C15—H15C | 0.9800 |
C6—H6C | 0.9800 | C16—H16A | 0.9800 |
C7—C9 | 1.534 (4) | C16—H16B | 0.9800 |
C7—C8 | 1.538 (4) | C16—H16C | 0.9800 |
C7—H7 | 1.0000 | C17—C18 | 1.523 (4) |
C8—H8A | 0.9800 | C17—C19 | 1.527 (4) |
C8—H8B | 0.9800 | C17—H17 | 1.0000 |
C8—H8C | 0.9800 | C18—H18A | 0.9800 |
C9—H9A | 0.9800 | C18—H18B | 0.9800 |
C9—H9B | 0.9800 | C18—H18C | 0.9800 |
C9—H9C | 0.9800 | C19—H19A | 0.9800 |
C10—C12 | 1.529 (4) | C19—H19B | 0.9800 |
C10—C11 | 1.530 (4) | C19—H19C | 0.9800 |
C10—H10 | 1.0000 | ||
P3—Pt1—P13i | 171.67 (3) | C10—C11—H11A | 109.5 |
P3—Pt1—P13 | 110.66 (2) | C10—C11—H11B | 109.5 |
P13i—Pt1—P13 | 77.47 (3) | H11A—C11—H11B | 109.5 |
P3—Pt1—H2 | 83.5 (12) | C10—C11—H11C | 109.5 |
P13i—Pt1—H2 | 88.4 (12) | H11A—C11—H11C | 109.5 |
P13—Pt1—H2 | 165.8 (12) | H11B—C11—H11C | 109.5 |
C7—P3—C4 | 102.65 (13) | C10—C12—H12A | 109.5 |
C7—P3—C10 | 108.41 (13) | C10—C12—H12B | 109.5 |
C4—P3—C10 | 104.12 (13) | H12A—C12—H12B | 109.5 |
C7—P3—Pt1 | 111.26 (9) | C10—C12—H12C | 109.5 |
C4—P3—Pt1 | 111.81 (9) | H12A—C12—H12C | 109.5 |
C10—P3—Pt1 | 117.37 (9) | H12B—C12—H12C | 109.5 |
C6—C4—C5 | 110.0 (2) | C14—P13—C17 | 101.90 (12) |
C6—C4—P3 | 112.7 (2) | C14—P13—Pt1i | 106.05 (9) |
C5—C4—P3 | 109.69 (19) | C17—P13—Pt1i | 111.17 (9) |
C6—C4—H4 | 108.1 | C14—P13—Pt1 | 119.34 (9) |
C5—C4—H4 | 108.1 | C17—P13—Pt1 | 115.63 (9) |
P3—C4—H4 | 108.1 | Pt1i—P13—Pt1 | 102.53 (3) |
C4—C5—H5A | 109.5 | C16—C14—C15 | 110.1 (2) |
C4—C5—H5B | 109.5 | C16—C14—P13 | 116.01 (19) |
H5A—C5—H5B | 109.5 | C15—C14—P13 | 110.48 (19) |
C4—C5—H5C | 109.5 | C16—C14—H14 | 106.6 |
H5A—C5—H5C | 109.5 | C15—C14—H14 | 106.6 |
H5B—C5—H5C | 109.5 | P13—C14—H14 | 106.6 |
C4—C6—H6A | 109.5 | C14—C15—H15A | 109.5 |
C4—C6—H6B | 109.5 | C14—C15—H15B | 109.5 |
H6A—C6—H6B | 109.5 | H15A—C15—H15B | 109.5 |
C4—C6—H6C | 109.5 | C14—C15—H15C | 109.5 |
H6A—C6—H6C | 109.5 | H15A—C15—H15C | 109.5 |
H6B—C6—H6C | 109.5 | H15B—C15—H15C | 109.5 |
C9—C7—C8 | 111.3 (2) | C14—C16—H16A | 109.5 |
C9—C7—P3 | 112.72 (19) | C14—C16—H16B | 109.5 |
C8—C7—P3 | 115.95 (19) | H16A—C16—H16B | 109.5 |
C9—C7—H7 | 105.3 | C14—C16—H16C | 109.5 |
C8—C7—H7 | 105.3 | H16A—C16—H16C | 109.5 |
P3—C7—H7 | 105.3 | H16B—C16—H16C | 109.5 |
C7—C8—H8A | 109.5 | C18—C17—C19 | 109.8 (2) |
C7—C8—H8B | 109.5 | C18—C17—P13 | 114.37 (19) |
H8A—C8—H8B | 109.5 | C19—C17—P13 | 109.31 (19) |
C7—C8—H8C | 109.5 | C18—C17—H17 | 107.7 |
H8A—C8—H8C | 109.5 | C19—C17—H17 | 107.7 |
H8B—C8—H8C | 109.5 | P13—C17—H17 | 107.7 |
C7—C9—H9A | 109.5 | C17—C18—H18A | 109.5 |
C7—C9—H9B | 109.5 | C17—C18—H18B | 109.5 |
H9A—C9—H9B | 109.5 | H18A—C18—H18B | 109.5 |
C7—C9—H9C | 109.5 | C17—C18—H18C | 109.5 |
H9A—C9—H9C | 109.5 | H18A—C18—H18C | 109.5 |
H9B—C9—H9C | 109.5 | H18B—C18—H18C | 109.5 |
C12—C10—C11 | 110.6 (2) | C17—C19—H19A | 109.5 |
C12—C10—P3 | 117.8 (2) | C17—C19—H19B | 109.5 |
C11—C10—P3 | 111.9 (2) | H19A—C19—H19B | 109.5 |
C12—C10—H10 | 105.1 | C17—C19—H19C | 109.5 |
C11—C10—H10 | 105.1 | H19A—C19—H19C | 109.5 |
P3—C10—H10 | 105.1 | H19B—C19—H19C | 109.5 |
P13i—Pt1—P3—C7 | 31.4 (2) | C7—P3—C10—C11 | 48.1 (2) |
P13—Pt1—P3—C7 | −135.55 (10) | C4—P3—C10—C11 | 156.87 (19) |
P13i—Pt1—P3—C4 | −82.7 (2) | Pt1—P3—C10—C11 | −79.0 (2) |
P13—Pt1—P3—C4 | 110.32 (10) | P3—Pt1—P13—C14 | −65.19 (10) |
P13i—Pt1—P3—C10 | 157.11 (18) | P13i—Pt1—P13—C14 | 116.73 (10) |
P13—Pt1—P3—C10 | −9.88 (11) | P3—Pt1—P13—C17 | 56.96 (10) |
C7—P3—C4—C6 | −51.8 (2) | P13i—Pt1—P13—C17 | −121.13 (10) |
C10—P3—C4—C6 | −164.7 (2) | P3—Pt1—P13—Pt1i | 178.09 (2) |
Pt1—P3—C4—C6 | 67.6 (2) | P13i—Pt1—P13—Pt1i | 0.0 |
C7—P3—C4—C5 | −174.7 (2) | C17—P13—C14—C16 | −57.0 (2) |
C10—P3—C4—C5 | 72.3 (2) | Pt1i—P13—C14—C16 | −173.41 (19) |
Pt1—P3—C4—C5 | −55.3 (2) | Pt1—P13—C14—C16 | 71.7 (2) |
C4—P3—C7—C9 | 167.9 (2) | C17—P13—C14—C15 | 176.81 (19) |
C10—P3—C7—C9 | −82.4 (2) | Pt1i—P13—C14—C15 | 60.41 (19) |
Pt1—P3—C7—C9 | 48.1 (2) | Pt1—P13—C14—C15 | −54.5 (2) |
C4—P3—C7—C8 | −62.2 (2) | C14—P13—C17—C18 | −53.1 (2) |
C10—P3—C7—C8 | 47.5 (2) | Pt1i—P13—C17—C18 | 59.6 (2) |
Pt1—P3—C7—C8 | 178.02 (18) | Pt1—P13—C17—C18 | 175.91 (17) |
C7—P3—C10—C12 | −81.7 (2) | C14—P13—C17—C19 | −176.60 (19) |
C4—P3—C10—C12 | 27.1 (3) | Pt1i—P13—C17—C19 | −63.98 (19) |
Pt1—P3—C10—C12 | 151.27 (19) | Pt1—P13—C17—C19 | 52.4 (2) |
Symmetry code: (i) −x, −y+2, −z+2. |
Experimental details
Crystal data | |
Chemical formula | [Pt2(C6H14P)2H2(C9H21P)2] |
Mr | 946.94 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 100 |
a, b, c (Å) | 8.8301 (3), 14.8153 (5), 14.1688 (5) |
β (°) | 90.097 (2) |
V (Å3) | 1853.57 (11) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 7.73 |
Crystal size (mm) | 0.53 × 0.13 × 0.11 |
Data collection | |
Diffractometer | Bruker X8 APEXII diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2008) |
Tmin, Tmax | 0.360, 0.745 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 38282, 3943, 3478 |
Rint | 0.051 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.018, 0.038, 1.03 |
No. of reflections | 3943 |
No. of parameters | 177 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.72, −0.66 |
Computer programs: APEX2 (Bruker, 2010), SAINT-Plus (Bruker, 2010), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), XP in SHELXTL (Sheldrick, 2008).
Acknowledgements
Financial support by the DFG is gratefully acknowledged.
References
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Bis[µ-di(isopropyl)phosphino]-di(hydrido)-bis[tri(isopropyl)phosphine]-di(platinum), bridged by the µ-PiPr2 ligands, displays a slightly distorted square-planar geometry. The two platinum centers show a Pt(1)–Pt(1i) distance of 3.6755 (2) Å. The Pt–Pt distance is comparable to that in bis[µ-di(tert-butyl)phosphino]-di(hydrido)-bis[tri(ethyl)phosphine]-di(platinum) [Pt2H2(µ-PtBu2)2(PEt3)2] (3.646 Å).
The bond angles P(13)–Pt(1)–P(13i) [77.47 (3)°] and Pt(1)–P(13)–Pt(1i) [102.53 (3)°] are slightly out of range of the structural parameters of the complexes without Pt–Pt bonding from Itazaki et al. (2004) [P–Pt–P 74.6–77.2° and Pt–P–Pt 102.8–105.4°]. This could be due to the less sterical hindrance of the iso-propyl groups by contrast with the tert-butyl groups in the reference substance [Pt2H2(µ-PtBu2)2(PEt3)2].
Chiang et al. (1984) reported the bond length of a terminal Pt–H bond determined by neutron diffraction method. They found for the Pt–H bond on a five coordinate platinum centre a bond length of 1.610 (2) Å in the compound [Pt2H3(Ph2PCH2CH2PPh2)2]+[BPh4]-. In the title compound [Pt2H2(µ-PiPr2)2(PiPr3)2] [1.57 (3) Å] the bonding disctance of Pt–H is 2.5% shorter than in the neutron experiment of Chiang et al., due to the smaller coordination number of four in the former species.
The group of Knobler et al. (1983) also determined the Pt–H bond length by X-Ray diffraction in [Pt2H3(Ph2PCH2CH2PPh2)2]+[BPh4]- to be 1.527 Å, however without further refinement.
The bonding dictances Pt–P in trans-position to the hydrido ligand are with 2.3773 (7) Å longer than the bonding distances in trans-position to the phosphine ligand 2.3343 (7) Å.