16633-72-0Relevant articles and documents
Orthorhombic and Monoclinic Allotropes of cis-, cis-Dichlorobis(methyldiphenylphosphine)platinum(II): Structure Analyses
Kin-Chee, Ho,McLaughlin, George M.,McPartlin, Mary,Robertson, Glen B.
, p. 421 - 425 (1982)
The crystal-structure analysis of two stable allotropes of cis- (C26H26Cl2P2Pt, Mr=666.44) is reported. (I) is orthorhombic, space group P212121 with a = 10.0271(6), b = 14.5578(6), c = 17.0528(8) Angstroem, Z=4, V=2489.24 Angstroem3, Dm=1.77(2), Dc=1.778 Mg m-3, F(000)=1296, μ(Cu Kα)=14.025 mm-1, T=294(1) K. (II) is monoclinic, space group p21/c with a=12.8639(9), b=13.6580(3), c=18.9963(14) Angstroem, β=131.312(6)o, Z=4, V=2506.93 Angstroem3, Dm=1.76(1), Dc=1.766 Mg m-3, F(000)=1296, μ(Cu Kα)=13.926 mm-1, T=294(1) K.Full-matrix least-squares refinements, with fixed H atoms, converged with R = 0.024 for (I) (2296 reflections) and 0.019 for (II) (3220 reflections).Molecules in both allotropes are essentially cis square planar, with similar small tetrahedral deformations of the coordination spheres.In (II) the PMePh2 ligands are disposed less symmetrically than in (I), resulting in inequivalence of the Cl-Pt-P angles o> and of the Pt-Cl distances .The Pt-P distances are equivalent within experimental error .Corresponding mean bond distances for (I) are Pt-P, 2.249(1) and Pt-Cl, 2.350(1) Angstroem.
Multiple coordination modes of hemilabile 3-dimethylaminopropyl chalcogenolates in platinum(II) complexes: Synthesis, spectroscopy and structures
Dey, Sandip,Jain, Vimal K.,Butcher, Ray J.
, p. 2653 - 2660 (2008/10/09)
The reactions of N,N-dimethylaminopropyl chalcogenolates with platinum(II) compounds have been carried out and complexes of the types [PtCl(ECH2CH2CH2NMe2)]2 (1) (E = S (1a) and Se (1b)), [Pt(ECH2CH2CH2NMe2)2]n (2) (E = S (2a) and Se (2b)), [(PtCl2)2{(Me2NCH2CH2CH2E)2}]n (3), [PtX(SeCH2CH2CH2NMe2)]2 (4) (X = SePh (4a) and OAc (4b)) and [PtCl(ECH2CH2CH2NMe2)(PR3)]n (5) (E = S, Se, Te) have been isolated. These complexes have been characterized by elemental analysis, IR, UV-Vis, NMR (1H, 13C, 31P, 77Se, 195Pt) spectroscopy and FAB mass spectral data. The structures of [PtCl(SeCH2CH2CH2NMe2)]2 (1b) and [PtCl(SCH2CH2CH2NMe2)(PPr3)]2 (5a) have been established by single crystal X-ray diffraction data. Both the molecules have dimeric structures. In 1b, two platinum atoms are held together by symmetrically bridging Se atoms of the chelating selenolate groups. In 5a, two thiolates form a four-membered Pt2S2 bridge with dangling NMe2 groups.
Substitution and Isomerisation Reactions at Platinum(II) involving Halide, Tertiary Phosphine, Carbonyl, and Isonitrile Ligands
Cross, Ronald J.,Phillips, Ian G.
, p. 2261 - 2264 (2007/10/02)
Carbon monoxide catalyses trans to cis isomerisations of (L = tertiary phosphine) in chloroform solution.The process involves formation of five-co-ordinate intermediates from which halide or tertiary phosphine can be eliminated, giving trans-(1+) or cis- respectively.Structure changes appear to be by pseudo-rotations rather than by consecutive displacements.A number of isonitrile complexes undergo similar reactions.Halide-bridged cations (2+) formed by halide extraction from cis- by Ag(1+) enter rapid (n.m.r. time-scale) exchange processes with the latter complexes at ambient temperatures.Halide elimination from cis- by solvent chloroform appears to initiate the process.The trans isomers do not participate in the exchange.
