摘要:
1-Methyl-5-mercapto-tetrazole (mmtz) reacts with Co(II) salts in the presence of N-containing ligands and three Co-II/Co-III complexes, [Co-II(mmtz)(2)(4,4'-bipy)(H2O)(2)](n) (1), [Co-III(mmtz)(2) (1,10-phen)(2)]NO3 (2), and [Co-2(III)(mmtz)(2)(2,2'-bipy)(2)(mu-OH)(2)]Cl-2 (3), have been characterized using single-crystal X-ray diffraction structure determination, IR, and elemental analysis. Complex 1 has a 1-D polymeric structure with neutral [Co(mmtz)(2)(4,4'-bipy)(H2O)(2)] as repeating unit. These 1-D infinite chains are further connected into a 3-D supramolecular framework through intermolecular hydrogen bonds. In 2, mmtz is an S-bonding ligand to form a mononuclear structure. In 3, mmtz as a mu(2) bridging ligand links Co(III) ions to form a dimeric structure. Thermostability of 2 and 3 and electrochemical properties of 1-3 are discussed.