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

PDF Url : ADA183560

Report Date : 11 Aug 1987

Pagination or Media Count : 9

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 bis(trimethylsilyl) compound 5 reacts with PhBCl2 via bond cleavage. Also, the bis(dimethylamino)boryl 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 oligomers/polymers. 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