Jochen Rall, Matthias Wanner, Markus Albrecht, Fridmann M. Hornung, and Wolfgang. Kaim. Sensitive valence tautomer equilibrium of paramagnetic complexes (L)Cun+(Qn-) (n = 1 or 2; Q = quinones) related to amine oxidase enzymes. Chemistry - A European Journal, (5)10:2802--2809, 1999. [PUMA: amine benzoquinone catecholate complex complex;semiquinone copper isomerism isomerism;catecholate isomerism;crystal model oxidase prepn structure structure;copper triazacyclononane valence]