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Synthesis and structure of new types of organogermanium compounds containing α-amino acid or α-aminophosphonic acid moieties

✍ Scribed by Zhong-Biao Zhang; Lian-Sheng Li; Ru-Yu Chen

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
182 KB
Volume
10
Category
Article
ISSN
1042-7163

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✦ Synopsis

A series of germasesquioxides and germatranes containing ␣-amino acid or ␣-aminophosphonic acid moieties was synthesized by the reaction of b-trichlorogermylpropionyl chloride with ␣-amino acid esters or ␣-aminophosphonates. The structures of all products were confirmed by 1 H NMR, 31 P NMR, and IR spectra, and elemental analyses. The intramolecular monocyclic penta-coordinated structure of the trichlorogermyl intermediate was determined by X-ray diffraction. The X-ray analyses showed that the geometry about the germanium atom was a slightly distorted trigonal bipyramid, and a coordinate covalent bond exists between the oxygen and the germanium atoms.

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