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Pressure‐ and Temperature‐Induced Valence Tautomeric Interconversion in a o‐ Dioxolene Adduct of a Cobalt–Tetraazamacrocycle Complex
Author(s) -
Caneschi Andrea,
Dei Andrea,
Fabrizi de Biani Fabrizia,
Gütlich Philipp,
Ksenofontov Vadim,
Levchenko George,
Hoefer Andreas,
Renz Franz
Publication year - 2001
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/1521-3765(20010917)7:18<3926::aid-chem3926>3.0.co;2-6
Subject(s) - tautomer , adduct , cobalt , valence (chemistry) , chemistry , stereochemistry , organic chemistry
An electronic switch at the molecular level has been realized by using a class of ionic compounds of the formula [Co(L)(diox)]Y (L=tetraazamacrocyclic ligand, Y=mononegative anion). Such compounds undergo temperature‐ and pressure‐induced intramolecular one‐electron transfer equilibria. The transition temperature of interconversion varies with the nature of the counterions Y (Y=PF 6 , BPh 4 , I). Surprisingly the effect of the anion on the transition temperature is not only governed by its volume but also by its coulombic interaction.