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Tetraphosphasemibullvalene: First Valence Isomerizations in the Phosphaalkyne Cyclotetramer System
Author(s) -
Mack Andreas,
Breit Bernhard,
Wettling Thomas,
Bergsträsser Uwe,
Leininger Stefan,
Regitz Manfred
Publication year - 1997
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.199713371
Subject(s) - isomerization , valence (chemistry) , chemistry , valence bond theory , computational chemistry , photochemistry , stereochemistry , organic chemistry , molecule , catalysis , molecular orbital
Stable only up to −25°C , the semibullvalene 1 does not possess a fluctuating structure in solution at room temperature, but rather isomerizes to give the “bis(homo)prismane” 2 . The latter valence isomer is accessible by numerous, widely varying routes, and the isomerization can be reversed photochemically ( 2 → 1 ).