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A Novel Pt(II)-Pt(IV) Mixed Valence Complex: The Crystal and Molecular Structure of [LPt(μ-l)(μ-Me2PCH2PMe2)2PtMe3] [h], L = 0.451 + 0.55Me

Ljubica Manojlović-Muir ; Department of Chemistry, University of Glasgow, Glasgow G12 BQQ, Great Britain
Kenneth W. Muir ; Department of Chemistry, University of Glasgow, Glasgow G12 BQQ, Great Britain

Sažetak

X-ray structure determination of the title compound has
shown that iodination of [Pt2Me4 (,u-Me2PCH2PMe2)2] involves an
oxidative addition reaction accompanied by methyl group transfer
between the two platinum atoms. The crystal structure is built
of symmetrical, linear [Isl- anions and partially disordered cations,
in which I- or CH3- ligands occupy the L sites with nearly equal
propability. In the cations the Pt(II) and Pt(IV) centres are
characterised by square planar and octahedral coordination geometries;
they are locked into close proximity [Pt ... Pt 386.3(1) pm]
by two bridging Me2PCH2PMe2 ligands. The L-shaped LPt(μ -I)PtMe
fragment [Pt-I-Pt 91.2(1)0 ] is perpendicular to the Pt(l)P2L(μ -I)
and Pt(2)P2C2 coordination planes. The overall geometry of the
cation approximates to C8 symmetry.
Crystals of the title compound are triclinic, space group Pl,
with two formula units in a unit cell of dimensions a = 924.0(2),
b = 932.8(4), c = 1804.4(7) pm, a = 102.39(4), fl = 94.63(3) and y =
= 96.93(3)0 . Lecrst-squares refinement of the structural model defined
by 221 parameters converged at a conventional R index on
F of 0.049 for 5045 reflections with I ~ 3 a (I).

Ključne riječi

Hrčak ID:

194127

URI

https://hrcak.srce.hr/194127

Datum izdavanja:

20.10.1984.

Posjeta: 863 *