ISSN:
0009-2940
Keywords:
λ5-Germanate, zwitterionic
;
Germanium, pentacoordinate
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The zwitterionic spirocyclic λ5-germanate bis[2,3-naphthalenediolato(2 - )](pyrrolidiniomethyl)germanate (8) was synthesized and the crystal structure of its tetartoacetonitrile solvate 8 · 1/4 CH3CN studied by single-crystal X-ray diffraction. Compound 8 was prepared by reaction of (MeO)3-GeCH2NC4H8 (11; NC4H8 = pyrrolidino) with two equivalents of 2,3-naphthalenediol (isolated as 8 · 1/4 CH3CN; yield 92%). The coordination polyhedron around the pentacoordinate germanium atom of 8 · 1/4 CH3CN can be described as a strongly distorted trigonal bipyramid (the structure is displaced by 38.9% from the ideal trigonal bipyramid towards the ideal square pyramid), the carbon atom occupying an equatorial position. In the crystal lattice of 8 · 1/4 CH3CN, the zwitterions form intermolecular N—H⃛O hydrogen bonds leading to the formation of dimers. 1H- and 13C—NMR studies revealed that 8 also exists in solution ([D6]DMSO).
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19941270410
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