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Diphosphine derivatives—VI. Vibrational spectrum, conformation and ligand behaviour of tetraallyldiphosphine disulphide

Authors
Journal
Spectrochimica Acta Part A Molecular Spectroscopy
0584-8539
Publisher
Elsevier
Publication Date
Volume
36
Issue
5
Identifiers
DOI: 10.1016/0584-8539(80)80170-x

Abstract

Abstract Tetraallyldiphosphine disulphide P 2(C 3H 5) 4S 2 has a centrosymmetric trans structure in the crystal. This structure is retained in solution, with no evidence of isomerism resulting from restricted rotations of the allyl side-chains about the PC bonds. It is not possible to determine the internal allyl-group conformation ( cis or gauche) unambiguously from the spectrosopic data. The molecule forms relatively few stable complexes; those which are obtained contain the ligand in a chelate (possibly cis) conformation. The PP stretching frequency rises from 466 to 490 cm −1 on complex formation and skeletal frequencies in the coordinated ligand are generally similar to those in the corresponding tetraethyl, tetrapropyl and tetrabutyl compounds.

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