Amphi-syn stereoisomers with 62: 38 compositional ratio existing in 3-nitrolawsoneoxime [ S. Y. Rane et al., 1990] leads to two configurational forms in its copper (II) complex 1 viz. [Cu(NO2-LwOx)(2)] center dot 3H(2)O. The D-4h: D-2h geometries of 1 have been detected in 70: 30 ratio from solution EPR spectra. Line width alternation effect with superimposition of metal-ligand hyperfine splits lead to anisotropic magnetic parameters. Best fitted bonding parameters of 1 are compared with (OO)-O-boolean AND and (NO)-O-boolean AND donor complexes.

Syntheses of phthiocol complexes with Cu(II) in inert media resulted in anhydrous monomer Cu-4: [Cu(NQ)2] and dimer Cu-5: [Cu(NQ)(NSQ)]2, however synthesis in air generates polymeric hydrated Cu-6: [Cu(NQ)2(H2O)2]n. Media and colligation give rise to charge transfers in coordination compounds and lead to different redox ligations of 3-methyl-2-hydroxy-1,4-naphthoquinone. These redox forms are determined from quantitization of activation energies (E a) of different pyrolytic steps in TG using the rising temperature expression of Coats and Redfern. 'Tyrosinase'-type mechanism is discussed for the redox-type ligation. Characteristic six-line EPR signals of dimeric Cu-5 lead to zero field splitting parameters D=0.01608 cm-1and E=0.01576 cm-1. Cu-6 shows molecular association through hydrogen bonding. Variable temperature magnetic measurement data of Cu-6 from 6 to 300 K is fitted to the polymeric expression of Bonner and Fisher model. The best fit was obtained with antiferrromagnetic exchange coupling constantJ=-2 cm-1, g=2.2 having R=4.2·10-4.