Jochen Rall, Andreas F. Stange, Klaus Hubler, and Wolfgang. Kaim. A coordination-induced 1,4 $\rightarrow$ 1,2-quinonediimine isomerization. Angewandte Chemie, International Edition, (37)19:2681--2682, 1998. [PUMA: azophenine complex copper complex;isomerization complexation structure;crystal prepn structure]