Neutral Square-Planar Olefin/Alkyl Platinum(II) Complexes Containing a N,N‘-Imino−Amide Ligand. Experimental and Theoretical Evidence of Relevant π-Back-Donation in the Platinum−Olefin Bond

摘要: A new class of platinum(II) compounds the formula [PtMe(olefin)(N,N‘-imino−amide chelate)] is described (olefin = ethylene, propylene, styrene, allyl alcohol, methyl vinyl ketone, acrylate; N,N‘-imino−amide chelate N,N‘-(1,2-dimethyl-1,2-ethanediylidene)bis(2,6-diisopropylaniline)). The neutral complexes exhibit square-planar coordination with a cis arrangement olefin and alkyl group. have been characterized through one- two-dimensional NMR spectroscopy, which has disclosed that only one isomer present in solution. This exhibits alkene N(amido) atom trans positions, while substituent oriented toward Pt−Me vector. nature ligands seem suitable to favor π-back-donation contribution Pt−olefin bond an extent unprecedented for compounds, as discussed on basis parameters theoretical calculations.