Trans Influence of Triphenylstibine: Crystal Structures of cis‐[PtBr2(SbPh3)2], trans‐[PtBr(Ph)(SbPh3)2], [NMe4][PtBr3(SbPh3)], and cis‐[PtBr2(SbPh3)(PPh3)] |
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Authors: | P Sharma A Cabrera M Sharma C Alvarez J L Arias R M Gomez S Hernandez |
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Abstract: | The work reports the unexpected reaction of diphenyldibromo antimonates (III) with PtCl2 and cis‐PtCl2(PPh3)2]. The reaction gives triphenylstibine containing PtII complexes viz. cis‐PtBr2(SbPh3)2] ( 1 ), trans‐PtBr(Ph)(SbPh3)2] ( 2 ), NMe4]PtBr3(SbPh3)] ( 3 ), and cis‐PtBr2(PPh3)(SbPh3)] ( 4 ). All the complexes were characterised by elemental analyses, IR, Raman, 195Pt NMR, FAB mass spectroscopy and X‐ray crystallography. A plausible mechanism via the phenyl migration is proposed for the formation of these complexes. The average Pt–Br distance in 1 is 2.456(2) Å, in 2 2.496 Å(trans to Ph) while in 3 it is 2.476 Å (trans to Sb) implying a comparable trans influence of Ph3Sb and Ph3P. |
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Keywords: | Platinum Stibine Crystal structures Trans influence |
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