کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1307518 | 975144 | 2011 | 6 صفحه PDF | دانلود رایگان |
Reaction of the metalloligand [Pt2(μ-S)2(PPh3)4] with the N-heterocyclic carbene (NHC) complexes IPrAuCl, IMesAuCl and IMesAgCl in methanol gave the first examples of metal adducts of [Pt2(μ-S)2(PPh3)4] that contain NHC ligands, namely [Pt2(μ-S)2(PPh3)4AuL]+ (L = IPr, IMes) and [Pt2(μ-S)2(PPh3)4AgIMes]+. The complexes were isolated as hexafluorophosphate salts. Reaction of [Pt2(μ-S)2(PPh3)4] with excess IPrAuCl in refluxing methanol yielded only the mono-adduct, in contrast to the behaviour with the gold(I) phosphine complex Ph3PAuCl, which undergoes double addition giving [Pt2(μ-SAuPPh3)2(PPh3)4]2+. The X-ray structure of [Pt2(μ-S)2(PPh3)4AuIPr]PF6 was determined and reveals that the ‘free’ sulfide is substantially sterically protected by the IPr ligand, accounting for the low reactivity towards addition of a second AgIPr+ moiety.
Reactions of the metalloligand [Pt2(μ-S)2(PPh3)4] with the N-heterocyclic carbene (NHC) complexes IPrAuCl, IMesAuCl and IMesAgCl in methanol gives the first examples of metal adducts of [Pt2(μ-S)2(PPh3)4] that contain NHC ligands, namely [Pt2(μ-S)2(PPh3)4AuL]+ (L = IPr, IMes) and [Pt2(μ-S)2(PPh3)4AgIMes]+.Figure optionsDownload as PowerPoint slideHighlights
► Synthesis of the first metal adducts of [Pt2(μ-S)2(PPh3)4] with ancillary NHC ligands.
► X-ray structure of [Pt2(μ-S)2(PPh3)4AgIPr]PF6 shows ‘free’ sulfide to be sterically protected.
► Steric protection has strong influence on reactivity of free sulfide ligand.
Journal: Inorganica Chimica Acta - Volume 378, Issue 1, 30 November 2011, Pages 121–126