Newly designed Mn (III)-W(V) bimetallic assembly built by manganese (III) Schiff-base and octacyanotungstate(V) building blocks: Structural topologies, and magnetic features

New complex [Mn (SB)(2)(DMF)(2)] [W (CN)(8)] hereafter referred to as complex1, which was prepared by self-assembly of [Mn (SB)(2)(DMF)(2)](3+)and [W (CN)(8)](3-)and structurally characterized by elemental analysis, infrared (IR) and single crystal X-ray techniques (H2SB is Schiff base derived from the condensation of salicylaldehyde and N,N-diethylethylenediamine and DMF is dimethylformamide). The structure consists of 1-D supramolecular chains and further stacks to give a 3-D supramolecular architecture whose molecular fragments are linked by hydrogen bond as well as C - H center dot center dot center dot pi interactions between [Mn (SB)(2)(DMF)(2)](3+)and [W (CN)(8)](3-). An underlying net for the representation consists of two types of fragments with 1,4 M5-1 and 1,8 M9-1 topologies and further illustration of the molecular network in terms of a graph-theory approach using simplification procedure resulted in the underlying net of 2C1topological type in the complex1. Magnetic susceptibility measurements of complex1was carried out in the temperature range 2-300 K, indicates the presence of either magnetic anisotropy zero field splitting, the effect of intramolecular interactions, or both. Complex1follows the Curie-Weiss law with Curie constant value of 3.43 cm(3)mol(-1)K, and the slight negative Weiss constant (-0.60 K) value indicates the predominant antiferromagnetic magnetic exchange interactions. The magnetic properties of Title complex was investigated thoroughly and showed that ferromagnetic interaction between W(V) and Mn (III) operateviathe intramolecular H-bonding interaction between cyanide nitrogens and a hydrogen atom.