Complexes of osazones with palladium(II) and platinum(II): isomerization, oxidation, and ortho-metallation of the co-ordinated ligands
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 15,p. 1601-1605
- https://doi.org/10.1039/dt9750001601
Abstract
The preparation, properties, and reactions of a series of complexes of general formula [MCl2(L)] are described for the first time (M = Pt) or reinvestigated (M = Pd)[L = Ph(H)N·N:[graphic omitted]:N·N(H)Ph (L1), Ph(H)N·N:C(Me)·C(Me):N·N(H)Ph (L2), and Ph(Me)N·N:C(Me)·C(Me):N·N(Me)Ph (L3)]. On treatment with base, complexes of L1 and L2 readily undergo hydrogen-chloride elimination to give species of formula [{MCl(L – H)}x] which contain a covalent M–N bond. These complexes in solution undergo further transformation with loss of a hydrogen molecule and formation of ortho-metallated diazoalkene derivatives, [M(L – 3H)Cl]. The complex [PtCl2(L3)], on treatment with silica gel or refluxing in nitromethane, affords, as the palladium analogue, the cyclometallated species [PtCl(L3– H)]. The reactivities of the ligands with palladium and platinum fire compared.Keywords
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