Journal of Organometallic Chemistry p. 15 - 30 (1983)
Update date:2022-08-11
Topics:
Kupce, E.
Liepins, E.
Lapsina, A.
Zelchan, G.
Lukevics, E.
A novel technique using trimethylsilyl aminoacetic acid derivatives and trialkoxy or trichloro derivatives of silicon and germanium has been employed to prepare sil- and germ-atranones.The 1H, 13C, 15N and 29Si NMR spectroscopy data obtained for the synthesized compounds indicate that an increase in the number of carbonyl groups in the atrane framework enhances charge transfer along the donor-acceptor N -> M bond.Because of the prominent electron-acceptor properties of the central atom, the atrantriones tend to bind electron-donor solvents.This is accompanied by an increase in the coordination number of silicon and germanium in these complexes, reaching six.A substitution in the equatorial position of the title compounds has been found to affect more readily charge transfer along the N -> M bond than in the axial one.The steric structure of the compounds under study is discussed.
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