Synthesis, Structure, and Isomerization of the ( E )‐ and ( Z )‐Isomers of a Diphosphene | Zendy

Niecke Edgar | Zendy; Altmeyer Oliver | Zendy; Nieger Martin | Zendy

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Synthesis, Structure, and Isomerization of the ( E )‐ and ( Z )‐Isomers of a Diphosphene

Author(s) -

Niecke Edgar,

Altmeyer Oliver,

Nieger Martin

Publication year - 1991

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.199111361

Subject(s) - isomerization , substituent , halogen , chemistry , aryl , stereochemistry , medicinal chemistry , catalysis , organic chemistry , alkyl

The halogen substituent of the diphosphanes 1 a, b decides whether the ( E )‐ or the ( Z )‐diphosphene 2a or 2b respectively is formed upon halosilane elimination. For the first time, therefore, it was possible to carry out the directed synthesis of both isomers of a diphosphene. These interconvert in solution, the activation barrier for the ( E / Z )‐isomerization at 293 K being 25.4 kcal mol −1 . Aryl = 2,4,6‐ t Bu 3 C 6 H 2 .

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