Pyrocatechol Complex Active in the Reaction of Molecular Nitrogen Reduction
A. F. Shestakov and A. E. Shilov
Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow oblast, 142432 Russia
Received August 22, 2000
Abstract—A detailed analysis of the previously obtained EPR spectra of the V(II)–pyrocatechol complex
active in the reduction reaction of molecular nitrogen was performed. On the basis of structural data for related
systems, a previous interpretation based on the complete disappearance of exchange interactions was revised.
The hyperfine structure of the EPR spectrum of the test complex was explained as a consequence of strong
exchange interactions, which effectively withdraw a portion of V atoms. A conclusion on the tetranuclear char-
acter of the active complex was made.
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