Coordination compounds of substituted 1,10-phenanthrolines and related bipyridyls. XII. Complexes of copper(I), silver(I), and nickel(II) with 2-Methyl-1,10-phenanthroline

Abstract

Copper(1) salts of the type Cu(mep)₂X (X = NO₃, ClO₄) (mep = 2-methyl- 1,l0-phenanthroline) were obtained by boiling the appropriate bis copper(11) complex in water or by reduction with hypophosphorous acid. They are expected to have a tetrahedral arrangement of donor nitrogen atoms about the copper(1) ion. Complexes Cu(mep)X (X = Br,I) were obtained by reduction of the appropriate copper(11) salt in hot water with hypophosphorous acid. These may be dimeric in the solid state with a tetrahedral arrangement of the ligand donor atoms. Complexes of the type Ag(mep)₂X (X = NO₃,ClO₄) were prepared and are believed to be tetrahedrally coordinated. Ag(mep)Br was also prepared and in the solid state may be a dimeric structure involving the bromo ligand as the bridging unit. Nickel complexes of the type Ni(mep)X₂ (X = Cl, NO₃) and Ni(mep)₂X₂,yH₂O (X = Cl, y = 4; X = NO₃, y = ½) were prepared and structures determined as far as possible by means of magnetic susceptibility and conductivity measurements, and by infrared and reflectance measurements.