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Coordination of Boron‐centered Lewis Acids by organo ‐substituted Phosphanylboranes
Author(s) -
Marquardt Christian,
Kahoun Tobias,
Baumann Josef,
Timoshkin Alexey Y.,
Scheer Manfred
Publication year - 2017
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201700219
Subject(s) - chemistry , lewis acids and bases , adduct , yield (engineering) , boron , crystal structure , stereochemistry , nuclear magnetic resonance spectroscopy , monomer , medicinal chemistry , frustrated lewis pair , mass spectrometry , crystallography , organic chemistry , catalysis , materials science , polymer , chromatography , metallurgy
The reactions of the monomeric phosphanylboranes Ph 2 P–BH 2 · NMe 3 ( 1a ) and t BuHP–BH 2 · NMe 3 ( 1b ) with the main group Lewis acids BH 3 and BBr 3 yield the adducts H 3 B · Ph 2 P–BH 2 · NMe 3 ( 2a ) and H 3 B · t BuHP–BH 2 · NMe 3 ( 2b ), Br 3 B · Ph 2 P–BH 2 · NMe 3 ( 3a ), and Br 3 B · t BuHP–BH 2 · NMe 3 ( 3b ). All these compounds were completely characterized by single‐crystal X‐ray structure analysis, NMR and IR spectroscopy as well as mass spectrometry and DFT computations. The secondary and tertiary phosphines 1a and 1b behave as classical Lewis bases to coordinate B X 3 ( X = H, Br) as terminal groups.