In:
Zeitschrift für anorganische und allgemeine Chemie, Wiley, Vol. 620, No. 6 ( 1994-06), p. 1093-1098
Abstract:
Synthesis of Boryl‐coupled Cyclotri‐ and ‐tetrasilazanes and four‐membered Cycloborasilazanes – Thermal Decomposition to SiC and BN Dilithiated octamethylcyclotetrasilazane reacts with a difluoroboryl substituted cyclotrisilazane to give the BF coupled 6‐8‐6‐membered cyclosilazane 1 , with Me 2 SiHCl structural isomeric cyclotetra‐ and cyclotrisilazanes of the type I and II, and with Me 3 SiCl structural isomeric cyclodisilazanes of the type III and IV are formed. The dilithium derivatives of the cyclosilazanes I and II as well as III and IV react with BF 3 and a BF 2 ‐substituted cyclotrisilazane to give four‐membered cyclo‐borasilazanes which are coupled with a cyclodisilazane via a SiMe 2 ‐group ( 2 – 4 ). The six‐membered cycloborasilazane 5 is a byproduct in the reaction with BF 3 . The reaction mechanisms are discussed. The pyrolysis with formation of SiC and BN and a crystal structure analysis were carried out with 1 .
Type of Medium:
Online Resource
ISSN:
0044-2313
,
1521-3749
DOI:
10.1002/zaac.19946200624
Language:
English
Publisher:
Wiley
Publication Date:
1994
detail.hit.zdb_id:
201094-X
detail.hit.zdb_id:
1481139-X
Permalink