Soluble B-N polymers: poly(alpha-olefin) analogs via metal complex-catalyzed amine borane dehydrogenation
- Los Alamos National Laboratory
Over the last few decades, catalytic dehydrocoupling has evolved from a mechanistically interesting chemical transformation to a practical route to inorganic polymers that have shown utility as new materials and processable ceramic precursors. In attempting to make new B-P and B-N inorganic polymers, Manners et al studied the heteronuclear dehydrocoupling of phosphine boranes and amine boranes. While the former gave high polymers such as (PhHP-BH2), evaluation of a variety of catalysts with primary and secondary amine boranes or even ammonia borane lead only to B-N cyclic oligomers. However, using an iridium phosphinito pincer complex originally employed by Goldberg and Heinekey6 for dehydrogenation of ammonia borane (AB, H3N-BH3), M3.nners now reports formation of soluble aminoborane polymers and copolymers derived from primary amine boranes (Scheme 1) With this report, an analogy is made between primary amine boranes and {alpha}-olefins. The prospects of tuning metal complex catalysts for control of B-N polymer microstructure are exciting for synthesis of new B-N materials. In addition, variation of the N substituent offers promise for processable precllISors to carbon-free B-N ceramics.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 957726
- Report Number(s):
- LA-UR-08-04329; LA-UR-08-4329; ANCEAD; TRN: US201016%%136
- Journal Information:
- Angewandte Chemie, Journal Name: Angewandte Chemie; ISSN 0044-8249
- Country of Publication:
- United States
- Language:
- English
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