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Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen, CXX. Niob‐ und Tantalamid–Komplexe sowie neue Cyclocarbodisilazane
Author(s) -
Herrmann Wolfgang A.,
Dyckhoff Florian,
Herdtweck Eberhardt
Publication year - 1992
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19921251205
Subject(s) - chemistry , tantalum , niobium , lithium amide , crystal structure , amide , lithium (medication) , transition metal , medicinal chemistry , x ray crystallography , yield (engineering) , stereochemistry , crystallography , catalysis , organic chemistry , endocrinology , metallurgy , enantioselective synthesis , medicine , materials science , physics , diffraction , optics
Multiple Bonds Between Main–Group Elements and Transition Metals, CXX [1] . – Niobium and Tantalum Amide Complexes and New Cyclocarbodisilazanes The new niobium‐ and tantalum complexes 3a and 3b of formula [(CH 3 ) 2 are accesible by the reaction of the oxychlorides MOCl 3 with the lithium amide ( 2 ) in 30 and 19% isolated yield, resp. The new silazanes cyclo ‐[(CH 3 ) 2 Si(CH 2 ) 2 Si(CH 3 ) 2 NH] 2 ( 5 ) and cyclo ‐[(CH 3 ) 2 Si(CH 2 ) 2 Si‐(CH 3 ) 2 NH] 3 ( 6 ) are prepared from (CH 3 ) 2 ClSiCH 2 CH 2 Si–Cl(CH 3 ) 2 and NH 3 . Their structures – ten‐ and fifteen–membered rings – were determined by single–crystal structure analyses.