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Vom Lithium‐Derivat des Aminodi‐ tert ‐butylfluorsilans zu Cyclodi‐, ‐tri‐ und ‐tetrasilazanen
Author(s) -
Kottke Thomas,
Klingebiel Uwe,
Noltemeyer Mathias,
Pieper Ursula,
Walter Simone,
Stalke Dietmar
Publication year - 1991
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.19911240909
Subject(s) - chemistry , derivative (finance) , dimer , lithium (medication) , crystal structure , stereochemistry , ring (chemistry) , medicinal chemistry , hexane , crystallography , organic chemistry , medicine , financial economics , economics , endocrinology
Aminodi‐ tert ‐butylfluorosilane (CMe 3 ) 2 SiFNH 2 reacts with BuLi in hexane to give the lithium derivative 1, which crystallizes from TMEDA with formation of the dimer 2 [(CMe 3 ) 2 SiFNHLi(TMEDA)] 2 . LiF elimination from 1 or 2 leads to cyclodi‐ (3), ‐tri‐ (4), and ‐tetrasilazane (6). 3 is the main product of the LiF elimination from 2 and 4 the main product resulting from 1. Cyclotetrasilazane 6 is the most planar eightmembered Si‐N ring known so far. Chain compound 5 is the direct precursor of 4. The crystal structures of 2, 5, and 6 are described. From the Lithium Derivative of Amino‐di‐ tert ‐butylfluorosilane to Cyclodi‐, ‐tri‐, and ‐tetrasilazanes