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.