Structure, EPR and UV-VIS and IR spectroelectrochemistry of reversibly reducible compounds (C5Me5)IrCl(L)(PF6), L= 1,3-dimethyllumazine or 1,3-dimethylalloxazine. Journal of the Chemical Society, Faraday Transactions, (92)21:4233--4238, 1996. [PUMA: EPR;crystal alloxazine complex complex;electrochem complex;flavin complex;pterin cyclopentadienyl cyclopentadienyl;EPR interaction iridium lumazine metal model;iridium model;spectroelectrochem prepn redn spectroelectrochem spectroelectrochem;lumazine spectroelectrochem;mol structure]