Heterometallic Manganese(III) Coordination Polymers with Schiff Bases (H2SALPN) and Dicyanometallates

Abstract

Single crystals of the Mn(III) complexes with tetradentate (N₂O₂) Schiff bases (L) and dicyanometallates [Mn(L)M(CN)₂]_n, where L = Salpn^2– = N,N'-bis(salicylidene)-1,3-diaminopropane, 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.