Formation of New Unusual Cadmium Polymer with Bridging Thiocyanate Ions

Abstract

The reaction of cadmium thiocyanate with 2-(methylamino)pyridine (2-Map) in an ethyl alcohol solution gave a new unusual coordination polymer [Cd2(NCS)4(2-Map)3]. The structure of the polymer was determined (CIF file CCDC no. 1917586). The crystals are triclinic, space group P$$\bar {1}$$. The polymer elementary unit is composed of binuclear [Cd2 (NCS)4(2-Map)3] moiety in which the Cd atoms are connected by μ-NCS bridges. The Cd(1) environment is completed to an octahedron (CdS2N4) via coordination of two pyridine nitrogen atoms of the 2-Map molecules in the apical positions. The Cd(2) coordination environment (CdS2N3) is a trigonal bipyramid supplemented by the pyridine nitrogen atom of the 2-Map molecule. The uncoordinated nitrogen atoms of the NH group are involved in the intrachain H-bonds with the NCS-group nitrogen atoms. The luminescence spectrum of the synthesized compounds was recorded.