New Copper and Oxomolybdate Robson-Type Polynuclear Macrocyclic Complexes: Structure, Spectroscopy, and Electrochemical Properties. (21st December 2015) - Nunes, Marcelo Carpes
Abstract : The polynuclear complexes [Mo3 O8 (tidf)]·dmso·2H2 O (1 ) and [{ Cu2 (tidf)} 2 ( μ -Mo8 O24 )] (2 ) (tidf 2− is a symmetrical tetraiminodiphenolate Robson-type macrocyclic ligand) were prepared from equimolar combinations of [Mg2 (tidf)](NO3 )2 ·4H2 O, [MoO2 Cl2 (dmso)2 ] (for1 ) and complex1 and Cu(ClO4 )2 ·4H2 O (for2 ) in acetonitrile. Molecular structures of both complexes were determined and showed atypical modes of coordination. A significant observation was the remarkable flexibility of the macrocycle ligand that effectively accommodated the steric demands of metal cations and the packing forces and showed a unique mode of coordination. Spectroscopic (UV-vis and FTIR) and redox properties are discussed.