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Molecular Structure of a 1,3‐Diphosphaallene: (2,4,6‐ t Bu 3 C 6 H 2 )PCP(2,4,6‐ t Bu 3 C 6 H 2 ), a Phosphorus Analogue of Carbon Disulfide
Author(s) -
Karsch Hans Heinz,
Reisacher HansUlrich,
Müller Gerhard
Publication year - 1984
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.198406181
Subject(s) - moiety , allene , molecule , crystallography , chemistry , crystal structure , diffraction , x ray crystallography , crystal (programming language) , stereochemistry , double bond , physics , optics , catalysis , polymer chemistry , organic chemistry , programming language , computer science
The first structure determination of a phosphacumulene by X‐ray diffraction indicates that the 1,3‐diphosphaallene 1 , synthesized independently, is a genuine allene analogue. Isolated molecules are present in the crystal and the bulky substituents are arranged othogonally. The PC bonds of the almost linear PCP moiety are markedly shorter (1.63 Å) than “normal” PC double bonds (1.68–1.72 Å); the CS bonds in CS 2 are also shorter than the CS bonds in thioketones