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Phosphane‐Borane Chemistry. – Borane Adducts of Two Polyfunctional Phosphanes
Author(s) -
Schmidbaur Hubert,
Wimmer Thomas,
Lachmann Joachim,
Müller Gerhard
Publication year - 1991
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19911240206
Subject(s) - borane , chemistry , adduct , molecule , bond cleavage , cleavage (geology) , crystal structure , toluene , medicinal chemistry , tris , stereochemistry , crystallography , catalysis , organic chemistry , biochemistry , geotechnical engineering , fracture (geology) , engineering
The tris(borane) adduct MeC(CH 2 PMe 2 BH 3 ) 3 ( 2 ) of 1,1,1‐tris‐[(dimethylphosphino)methyl]ethane has been prepared from the tripodal phosphane and Me 2 S–BH 3 as the borane source. The crystal structure of 2·1/2 toluene has been determined by single‐crystal X‐ray diffraction methods. The molecules display crystallographic C 3 symmetry and an overall staggered conformation. In an analogous way the bis(borane) adduct CH 2 (PH 2 BH 3 ) 2 ( 3 ) of 1,3‐diphosphapropane has been synthesized, which decomposes above 50°C to give insoluble products, whose elemental analysis indicated that termal P–C bond cleavage is more frequent than P–B bond cleavage.