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Selective Syntheses of 1,3‐Diphosphacyclobutadiene, Dewar‐1,3,5‐triphosphabenzene, 1,3,5‐Triphosphabenzene, and 1,3,5,7‐Tetraphosphabarrelene by Cyclooligomerization of Phosphaalkynes
Author(s) -
Binger Paul,
Stannek Jörg,
Gabor Barbara,
Mynott Richard,
Bruckmann Joachim,
Krüger Carl,
Leininger Stefan
Publication year - 1995
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.199522271
Subject(s) - cyclooctatetraene , chemistry , hafnium , medicinal chemistry , redox , inorganic chemistry , organic chemistry , molecule , zirconium
By varying the temperature , t BuCP reacts in the presence of η 4 ‐butadiene(η 8 ‐cyclooctatetraene)hafnium complexes to give different cyclooligomers. Thus, the triphosphabenzene 1 is formed at ‐78 °C and the dewar‐triphosphabenzene 2 at 0 °C. Both compounds are initially bound to the complex and can be liberated with hexachloroethane in a redox reaction. Compounds 1 and 2 are the first compounds of these classes of substances. Cyclodimers or cyclotetramers are obtained at higher temperature.