He-I and He-II photoelectron studies of bonding in metal silylamido-complexes, M[N(SiMe3)2] n (n= 1,2, or 3)
- 1 January 1982
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 5,p. 887-892
- https://doi.org/10.1039/dt9820000887
Abstract
Gas-phase He-I and He-II photoelectron spectra have been obtained for the following bis(trimethylsilyl)amido-metal complexes : M[N(SiMe3)2] where M = Li or Na; M[N(SiMe3)2]2 where M = Mg or Co; M[N(SiMe3)2]3 where M = Al, Cr, Ce, Pr, Nd, Eu, Yb, or U. Nitrogen lone-pair and metal–nitrogen π-bonding ionization energies show a constant trend throughout the series, increasing with the charge and decreasing with the size of the metal ion. A d band similar to that of Cr[N(CHMe2)2]3 is detected for Cr[N(SiMe3)2]3, and a very weak 4f band is the first ionization band in the spectrum of Ce[N(SiMe3)2]3. The 5f band of U[N(SiMe3)2]3, has a full width at half maximum of 1 eV, part of which is due to unresolved spin–orbit coupling.Keywords
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