New perspectives in boron—nitrogen chemistry—.i

Abstract

New perspectives in boron-nitrogen chemistry result from molecules RB=NR with two-coordinate boron atoms (iminoboranes) and from boranes NxByHz with nitrogen atoms of coordination number 4, 5, or 6 in the skeleton (azaboranes). - The structure, stabilization, and reactivity of iminoboranes RB-NR and the isoelectronic alkynes RO=CR are compared. Iminoboranes are building blocks of molecules (RBNR)n (n - 2,3,4,®) which are isoelectronic with cyclobutadiene, benzene, Dewar benzene, cyclooctatetraene, or polyacetylene. Acyclic and cyclic additions to the triple bond of RB=NR are described with a stress on transition metal complexes as reaction partners. - The formation of new azaboranes is reported, which are more or less organo-derivatives of nido-NB3H6. arachno-N2B3H7, nldo-N2B4H6. arachno-NB6H13~. nido-NB10H13. and closo-NBiiHi2. © 1991, IUPAC