RESEARCH ON PROBLEMS OF RESTRICTED ROTATION RELEVANT TO INORGANIC POLYMERS.
Abstract
Evidence from nuclear magnetic resonance (N.M.R.) studies for pi-bonding between B and N in the borazens is presented. That a similar situation might exist between P (III) and N in open chain compounds was indicated by IR studies. The energy barrier to rotation about the BN bond in dimeth ylaminophenylchloroborane was calculated, from observations upon three different parameters characterizing the shape of the N.M.R. signal, as 14 = 0.8 kcal/mole. The barrier in the cor responding bromo-compound was evaluated by analogous methods. The N.M.R. spectrum of the recently reported compound, 1,3-di-t-butyl-2,4 di-t-butylamino-1,3-diaza-2,4-boretane clearly demonstrated that the compound has more than one steric configuration presumably due to exocyclic pi-bonding. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1963
- Accession Number
- AD0426854
Entities
People
- Michael F. Lappert
Organizations
- University of Manchester