Designed Assemblies of Metal Halo and Pseudohalo Coordination Polymers with Bridging 1-Substituted Ditetrazoles
journal contributionposted on 07.05.2008, 00:00 by Jie-Hui Yu, Kurt Mereiter, Nader Hassan, Claudia Feldgitscher, Wolfgang Linert
The simple reactions between inorganic salts [CuX2 or M(SCN)2] and 1-ditetrazoles [btzb = 1,4-bis(tetrazol-1-yl)butane or btze = 1,2-bis(tetrazol-1-yl)ethane] at room temperature produced seven new coordination polymers: three-dimensional (3-D) CuX2(1,4-btzb) (X− = Cl− 1, Br− 2), two-dimensional (2-D) Cd(SCN)2(1,4-btzb) (3) and Cd(SCN)2(1,2-btze) (4), and one-dimensional (1-D) M(SCN)2(1,4-btzb)2 (M = Ni 5, Co 6) and Ni(SCN)2(1,2-btze)2 (7). With 1-ditetrazoles as the bridges, the 2-D grid-like CuX2 secondary building units (SBUs) are extended into 3-D network compounds 1 and 2, the 1-D chained Cd(SCN)2 SBUs based on Cd(SCN)2Cd units are linked into 2-D layered compounds 3 and 4 with the macrocyclic rings, whereas the mononuclear trans-M(SCN)2 units are connected into 1-D chained compounds 5−7 based on M(1-ditetrazole)2M macrocyclic rings. It deserves mentioning that 1-ditetrazoles show different shapes in different complexes: Z-shape in 1−4 and V-shape in 5−7. All the complexes are characterized by elemental analysis (CHNS), infrared spectroscopy, and thermogravimetric analysis.