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Tetraphosphabenzenes Obtained via a Triphosphacyclobutadiene Intermediate
Author(s) -
Piro Nicholas A.,
Cummins Christopher C.
Publication year - 2009
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200804432
Subject(s) - orange (colour) , cycloaddition , chemistry , ligand (biochemistry) , diene , stereochemistry , medicinal chemistry , photochemistry , organic chemistry , catalysis , receptor , biochemistry , natural rubber , food science
An acyl triphosphirene ligand transfers an O atom to Nb to liberate the putative triphosphacyclobutadiene intermediate [RCP 3 {W(CO) 5 } 2 ], which engages in [2+4]‐cycloaddition reactions with an organic diene and a phosphaalkyne (see scheme; P orange, O red, W violet, C white). The latter reaction yields the Dewar isomer of a tetraphosphabenzene, which can be converted to a tetraphosphabenzvalene containing a Z ‐diphosphene.