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From crystalline boryl‐substituted and boryl‐coupled 2,2,4,4,6,6‐hexamethyl‐cyclotrisilazanes to β‐SiC and BN
Author(s) -
Schaible Sabine,
Riedel Ralf,
Boese R.,
Werner E.,
Klingebiel Uwe,
Nieger Martin
Publication year - 1994
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.590080509
Subject(s) - chemistry , boron , crystallography , organic chemistry
[Me 2 SiNBFN(SiMe 3 ) 2 ] 3 (1) is synthesized in the reaction of trilithiated hexamethylcyclotrisilazane with F 2 BN(SiMe 3 ) 2 . The mono‐ and dilithium derivatives of the six‐membered ring (Me 2 SiNH) 2 Me 2 SiNSiFMe 2 react with the F 2 B‐substituted cyclotrisilazane F 2 B(NSiMe 2 ) 3 (SiFMe 2 ) 2 in the molar ratio 1:1 or 1:2 to give the BF‐coupled rings 2 and 3. The crystal structure analysis of 1 and 3 and pyrolysis of 1 and 3 with formation of silicon boron carbonitride and its crystallisation to composite powders at very high temperatures are reported.