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The π-bonding effects of other ligands on co-ordinated nitrite ion in palladium (II) and platinum (II) complexes

1966; Pergamon Press; Volume: 28; Issue: 9 Linguagem: Inglês

10.1016/0022-1902(66)80288-9

1878-1225

John L. Burmeister, Roy C. Timmer,

Metal complexes synthesis and properties

Abstract The preparation of a series of dinitro complexes of palladium (II) and platinum (II) with a variety of neutral ligands is described. The complexes were characterized with respect to their geometric structure (cis or trans) and the mode of co-ordination of the nitrite ion (N-bonded in all cases) on the basis of their infra-red spectra. A correlation has been found to exist between the π-bonding ability of the neutral ligands and the NO stretching frequencies of the co-ordinated nitrite ion. This is interpreted in terms of the extent of π-bonding between the filled dπ orbitals of the metal and the vacant π-antibonding orbital of the nitrite ion. Further support for this hypothesis is found in the effect of cis-trans isomerism on the NO stretching frequencies.