Synthesis and structure of K[Cd(O2N-C6H4-NNN-C6H4-NO2)3], an anionic 1,3-bis(4-nitrophenyl)triazenido complex of cadmium

The reaction of cadmium acetate in methanol with 1,3-bis(4-nitrophenyl)triazene in THF in the presence of KOH yields K[Cd(O2NC6H4NNNC6H4NO2)(3)] in form of hexagonal prismatic. red crystals with the trigonal space group R3 and a = 12.229(2), c = 48.988(10) Angstrom and Z = 6. In the anionic cadmium complexes, which are located along the threefold axis, the Cd atoms are coordinated in a trigonal prismatic arrangement by the atoms N(1) and N(3) of three triazenido ligands. The potassium canons are coordinated icosahedrally by oxygen atoms of each one nitro group of six neighbouring anionic complexes. The Cd-N distances are 2.376(4) and 2.350(4) Angstrom. and the K-O distances are in the range of 2.833(6) to 3.365(6) Angstrom.