The steric effect of o-tolyl ligand on the fluxionality behavior of some binuclear organoplatinum(II) complexes with bis(diphenylphosphino)methane as bridging ligand |
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| Authors: | Majid Hashemi Mehdi Rashidi |
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| Institution: | a Chemistry Department, Persian Gulf University, Faculty of Sciences, Bushehr 75168, Iran
b Chemistry Department, College of Sciences, Shiraz University, Shiraz 71454, Iran |
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| Abstract: | A series of binuclear organoplatinum(II) complexes of general formula cis,cis-R2Pt(μ-SMe2)(μ-dppm)Pt(o-MeC6H4)2], 3a-3d, in which R = Ph, p-MeC6H4, m-MeC6H4 or p-MeOC6H4, were prepared by the reaction of monomeric precursors Pt(o-MeC6H4)2(dppm)] and cis-PtR2(SMe2)2]. The binuclear dialkyl analogs, in which R = Me (3e) or R2 = {(CH2)4} (3f), were prepared by the reaction of cis-Pt(o-MeC6H4)2 (SMe2)2] and PtR2 (dppm)]. The complexes were fully characterized by multinuclear (1H, 13C, 31P, 195Pt) NMR spectroscopy each as a mixture of syn and anti isomers (depending on the relative orientations of Me substituents on o-tolyl ligands) and each isomer was shown to have a rigid structure. Other binuclear analogs  , 3g-3j, in which R is a less steric demanding aryl groups m-MeC6H4 or p-MeOC6H4, and R′ = Me or  , were prepared by the reaction of cis-PtR2(SMe2)2] and  , and shown to have fluxional structures. |
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| Keywords: | Organoplatinum complexes Binuclear Platinum complexes |
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