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First Observation of Alkali Metal Ion Induced Trans – Cis Isomerization of Palladium( II ) Phosphane Complexes Containing Crown Ether Moieties
Author(s) -
Yam Vivian WingWah,
Lu XiaoXia,
Ko ChiChiu
Publication year - 2003
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.200351178
Subject(s) - isomerization , chemistry , allosteric regulation , crown ether , molecule , intramolecular force , adduct , palladium , metal ions in aqueous solution , photochemistry , stereochemistry , ion , catalysis , organic chemistry , enzyme
Ion switches : The addition of small metal ions (such as Li + and Na + ) to trans ‐palladium( II ) complexes of PPh 2 ‐substituted benzo[15]crown‐5 and benzo[18]crown‐6 results in the formation of 1:1 trans adducts. However, the addition of large alkali ions (such as K + , Rb + , and Cs + ) enforces the complexes to undergo a trans – cis isomerization to enable formation of intramolecular sandwich adducts (see schematic representation).