Models and polyborazine precursors for boron nitride ceramics

Elimination-condensation reactions between Me(Cl{sub 2})B{sub 3}N{sub 3}Me{sub 3} and (Me{sub 3}Si){sub 2}NMe and between (ClBNMe){sub 3} and (Me{sub 3}Si){sub 2}NH form oligomeric borazinylamines, and a metathesis reaction between Li{sub 2}S and (ClBNH){sub 3} produces an oligomeric borazinyl sulfi...

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Bibliographic Details
Published in:Chemistry of materials 1990-07, Vol.2 (4), p.377-384
Main Authors: Narula, Chaitanya K, Lindquist, David A, Fan, Mao Min, Borek, Theodore T, Duesler, Eileen N, Datye, Abhaya K, Schaeffer, Riley, Paine, Robert T
Format: Article
Language:English
Subjects:
360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies
BORON COMPOUNDS
BORON NITRIDES
CERAMICS
COHERENT SCATTERING
CRYSTAL STRUCTURE
DATA
DATA ANALYSIS
DIFFRACTION
EXPERIMENTAL DATA
INFORMATION
MATERIALS SCIENCE
MEASURING INSTRUMENTS
MEASURING METHODS
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
PNICTIDES
PRECURSOR
SCATTERING
X-RAY DIFFRACTION
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Summary:Elimination-condensation reactions between Me(Cl{sub 2})B{sub 3}N{sub 3}Me{sub 3} and (Me{sub 3}Si){sub 2}NMe and between (ClBNMe){sub 3} and (Me{sub 3}Si){sub 2}NH form oligomeric borazinylamines, and a metathesis reaction between Li{sub 2}S and (ClBNH){sub 3} produces an oligomeric borazinyl sulfide. The pyrolysis chemistry of these oligomers has been examined, and conditions have been defined that produce hexagonal h-BN. Reactions that model the first stage of oligomer formation also have been studied, and the molecular species (Me{sub 3}N{sub 3}B{sub 3}(Me{sub 2})){sub 2}NH, (Me{sub 3}N{sub 3}B{sub 3}(Me{sub 2})){sub 2}NMe, (Me{sub 3}N{sub 3}B{sub 3}(Me{sub 2})){sub 2}S, and (Me{sub 3}N{sub 3}B{sub 3}(Me{sub 2})){sub 2}O have been isolated and characterized. Single-crystal x-ray diffraction analyses for these compounds have been completed.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm00010a013