The u.v. photoelectron (p.e.) spectra of [{Ni(η-C5H5)}2(µ-C2H2)] and [{Ni(η-C5H5)}2{µ-C2(CF3)2}] are reported. For the first time p.e. spectral features which are related to ionizations from molecular orbitals involved in metal–alkyne back-donation have been detected. The analysis of p.e. results for the CF3 derivative allow us to discuss in detail the mechanism of interaction between an alkyne and two metallic centres.
872Gas-Phase Ultraviolet Photoelectron Spectra of [Ni(η5-C5H5)]2(µ-C2R2) (R = H or CF3) Complexes
CASARIN, MAURIZIO;GRANOZZI, GAETANO;TONDELLO, EUGENIO;
1983
Abstract
The u.v. photoelectron (p.e.) spectra of [{Ni(η-C5H5)}2(µ-C2H2)] and [{Ni(η-C5H5)}2{µ-C2(CF3)2}] are reported. For the first time p.e. spectral features which are related to ionizations from molecular orbitals involved in metal–alkyne back-donation have been detected. The analysis of p.e. results for the CF3 derivative allow us to discuss in detail the mechanism of interaction between an alkyne and two metallic centres.
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