Heterometallic manganese(III) coordination polymers with Schiff bases (H<SUB>2</SUB>Salpn) and dicyanometallates

Single crystals of the Mn(III) complexes with tetradentate (N2O2) Schiff bases (L) and dicyanometallates [Mn(L)M(CN)2]n, where L = Salpn2– = N,N’-bis(salicylidene)-1,3-diaminopropane, M = M = Ag+ (I), Au+ (II) were obtained for the first time. The molecular structures of I and II were determined by X-ray diffraction (CCDC no. 2351118 (I), 2351119 (II)). It was found that the dicyanometallate anion [M(CN)2]ˉ in the crystal structure of these compounds acts as a bridge binding the Mn(III) moieties with the Schiff base into 1D. Using quantum chemical calculations, the (3, –1) type critical points were found near the C‒H…Ag/Au contact; this attests to the existence of weak hydrogen bonds between these atoms.