Synthesis and Structure of a Silver(I) Complex {[Ag5(L)2(NO3)4](NO3)(CHCl3)2}n [L = 2,3-bis(pyrimidine-2-thiomethyl)quinoxaline

Abstract

The reaction of the dithioether ligand, 2,3-bis(pyrimidine-2-thiomethyl)quinoxaline (L) with AgNO3, leads to the formation of a novel complex {[Ag5(L)2(NO3)4](NO3)(CHCl3)2}n 1, which has been characterized by single-crystal X-ray diffraction analysis: monoclinic, space group C2/c, with a = 34.741(7), b = 9.930(2), c = 17.004(4) A, β = 106.497(6)° and V = 5625(2) A3.Complex 1 consists of 2D {[Ag5(L)2(NO3)4]+}n cations, uncoordinated $$ {\text{NO}}^{ - }_{{\text{3}}} $$ anions and CHCl3 solvent molecules. In 1, there exist three crystallographic independent AgI centers, which adopt different coordination geometries. There exist π–π stacking interactions in the complex and these weak interactions further stabilize the crystal structure in the solid state. The coordination feature of the ligand has been investigated by DFT calculations. Synthesis and Structure of a Silver(I) Complex {[Ag5(L)2(NO3)4](NO3)(CHCl3)2}n [L = 2,3-bis(pyrimidine-2-thiomethyl)quinoxaline] Chao-Yan Zhang, Qian Gao, Ya-Bo Xie*, and Jian-Bo Feng The crystal structure of complex {[Ag5(L)2(NO3)4](NO3)(CHCl3)2}n (L = 2,3-bis(pyrimidine-2-thiomethyl)quinoxaline) consists of 2D {[Ag5(L)2(NO3)4]+}n cations, uncoordinated $$ {\text{NO}}^{ - }_{{\text{3}}} $$ anions and CHCl3 solvent molecules. There exist three crystallographic independent AgI centers, which adopt different coordination geometries. The coordination feature of the ligand has been investigated by DFT calculations.