Accession Number:

ADA183560

Title:

Boron-Nitrogen Polymer Precursors.

Descriptive Note:

Technical rept.,

Corporate Author:

TEXAS CHRISTIAN UNIV FORT WORTH DEPT OF CHEMISTRY

Personal Author(s):

• Shaw,S. Y.
• DuBois,Donn A.
• Neilson,Robert H.

Report Date:

1987-08-11

Pagination or Media Count:

9.0

Abstract:

The synthesis of tractable, linear B-N polymers RBNR is usually prevented by the ready formation of the extremely stable trimeric borazene ring system RBNR. In an attempt to circumvent this problem, we have prepared a series of new mono- and diboryl-amines, by Lithiation of the 1,3,2-diazaboracyclohexane ring system followed by quenching with electrophiles. The crystal and molecular structure has been determined by single crystal X-ray diffraction. Further chemistry of these compounds has been explored by reactions involving their pendent groups. For example, the bistrimethylsilyl compound 5 reacts with PhBCl2 via bond cleavage. Also, the bisdimethylaminoboryl derivative undergoes trans-amination reactions with 1,3-diaminopropane to give compounds containing two or three BN2C3 rings linded together. Preliminary thermolysis studies show that some of the diborylamines are potentially useful precursors to boron-nitrogen oligomerspolymers. Keywords Aminoborane, Boron-nitrogen, B-N polymer, Diborylamine.

Descriptors:

• *POLYMERS
• *PRECURSORS
• *CERAMIC MATERIALS
• *BORON COMPOUNDS
• *NITROGEN COMPOUNDS
• SYNTHESIS(CHEMISTRY)
• CYCLIC COMPOUNDS
• BONDING
• CHEMISTRY
• CLEAVAGE
• MOLECULAR STRUCTURE
• QUENCHING
• RINGS
• SINGLE CRYSTALS
• X RAY DIFFRACTION

Subject Categories:

• Organic Chemistry
• Ceramics, Refractories and Glass

Distribution Statement:

APPROVED FOR PUBLIC RELEASE