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Infrared spectra and structures of di-µ-carbonyl-(π-cyclopentadienylnickelio)carbonyl-π-cyclopentadienyliron(Ni–Fe), (π-C 5 H 5 ) 2 FeNi(CO) 3 and di-µ-carbonyl-bis-(π-cyclopentadienylnickel)(Ni–Ni), [(π-C 5 H 5 )Ni(CO)] 2

1971; Royal Society of Chemistry; Linguagem: Inglês

10.1039/j19710000717

2050-5582

P. McArdle, A.R. Manning,

Metal-Catalyzed Oxygenation Mechanisms

The i.r. spectra of [(π-C5H5)2FeNi(CO)3] and [(π-C5H5)Ni(CO)]2 have been investigated. They are independent of solvent, and are consistent with molecular structures which possess an almost-planar Fe·µ(CO)2·Ni and a puckered Ni·µ(CO)2·Ni bridging system respectively. Simple force-constant calculations which ignore interactions in v(CO) for bridging and terminal CO groups have been carried out. They accurately predict the frequencies of the v(CO) modes of molecules containing one 13CO ligand for both compounds.