886988-38-1Relevant articles and documents
Preparation, properties and structures of the first series of organometallic Pt(II) and Pt(IV) complexes with stibine co-ligands
Brown, Michael D.,Levason, William,Reid, Gillian,Webster, Michael
, p. 1667 - 1674 (2007/10/03)
The planar Pt(II) monomers [PtMe2(L-L)] and [(PtMe 2)2(L′-L′)2] dimers (L-L = R 2Sb(CH2)3SbR2, o-C6H 4(CH2SbMe2)2; L′-L′ = R2SbCH2SbR2; R = Me or Ph) are obtained in good yield via reaction of [PtMe2(SMe2)2] with L-L or L′-L′ in benzene. The Pt(iv) stibines, [PtMe3(L-L)I] (L-L = R2Sb(CH2)3SbR2, o-C 6H4(CH2SbMe2)2 or 2 × SbPh3, SbMePh2 or SbMe2Ph) are obtained by treatment of [PtMe3I] with L-L in chloroform. These represent the first series of stable Pt(iv) stibine complexes. All of the products have been characterised by 1H, 13C{1H}, 195Pt NMR spectroscopy, electrospray mass spectrometry and analysis. Crystal structure determinations on [PtMe3{R2Sb(CH2) 3SbR2}I], [PtMe3{o-C6H 4(CH2SbMe2)2}I] and [PtMe 3(SbPh3)2I] confirm the distorted octahedral environment at Pt, with fac Me groups and mutually cis Sb donor atoms. The Sb-Pt-Sb angle in the seven-membered chelate ring of the o-C6H 4(CH2SbMe2)2 complex is ca. 96°, compared to 1-distibines R2SbCH2SbR2 afford only the dinuclear [(PtMe3)2(μ-R2SbCH 2SbR2)(μ-I)2] in which the stibine ligand and two I atoms bridge two Pt atoms giving an edge sharing bioctahedral geometry which has been confirmed by a crystal structure analysis. The Pt(ii) species undergo oxidative addition with MeI to give the corresponding Pt(iv) species, while the Pt(iv) species reductively eliminate ethane upon thermolysis. The Royal Society of Chemistry 2006.
