A new tetraazamacrocycle functionalized with four pendant pyridyl groups: synthesis and crystal structure of the nickel(II) complex of 1,4,7,10-tetrakis(2-pyridylmethyl)-1,4,7,10-tetraazacyclododecane(L), [NiL] 2

• Published in: Polyhedron 1998, Vol.17 (2), p.289-293
• Main Authors: Bu, Xian-He, Cao, Xi-Chuan, Chen, Wei, Zhang, Ruo-Hua, Thomas, Clifford
• Format: Article
• Language: English
• Subjects: 1,4,7,10-tetrakis(2-pyridylmethyl)-1,4,7,10-tetraazacyclododecane; crystal structure; nickel(II) complex; synthesis
• ISSN: 0277-5387
• DOI: 10.1016/S0277-5387(97)00305-7

The title complex, [NiL](ClO 4) 2 was synthesized by the reaction of Nickel(II) perchlorate and the new macrocycle ligand, 1,4,7,10-tetrakis(2-pyridylmethyl)-1,4,7,10-tetraazacyclododecane (L) in ethanol solution. The crystal and molecular structure of this complex has been determined by single-crystal X-ray diffraction. The complex consists of [NiL] 2+ cation and two perchlorate anions. Within the [NiL] 2+ cation, the potential octadentate ligand is using its 4 nitrogen atoms of the macrocycle and 2 pyridine nitrogens to coordinate with the central nickel(II), while the other two pyridine nitrogens remained uncoordinated. The central nickel(II) ion is in a distorted-octahedral coordination environment and in high-spin state.