Premium
Triaminotriborane(3): A Homocatenated Boron Chain Connected by B−B Multiple Bonds
Author(s) -
Morisako Shogo,
Shang Rong,
Yamamoto Yohsuke,
Matsui Hiroshi,
Nakano Masayoshi
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201708215
Subject(s) - boron , bent molecular geometry , crystallography , chemistry , bond length , chain (unit) , molecule , crystal structure , stereochemistry , organic chemistry , physics , astronomy
A triaminotriborane(3) was isolated as purple crystals through the reduction of (TMP)BCl 2 (TMP=2,2,6,6‐tetramethylpiperidino) by sodium naphthalenide. Single‐crystal X‐ray diffraction and computational studies of the obtained triaminotriborane(3) revealed a bent structure of the [B(NR 2 )] 3 chain. The bond lengths between the central and terminal boron atoms were similar to those observed in neutral diborene species. The multiple‐bonding character may be best described by a three‐center two‐electron π‐bond along the B 3 chain. The distance between the two terminal boron atoms (2.177 Å) in the solid‐state structure implies a weak interaction between them. When an excess amount of Li was used as the reducing agent, the reaction yielded an unusual dianionic species. The isolation and characterization of these two reduction products are reported herein.