A new tetraazamacrocycle functionalized with pendant pyridyl groups: synthesis and crystal structure of a copper(II) complex of 1,4,7,10-tetrakis(2-pyridylmethyl)-1,4,7,10-tetraazacyclododecane (L), [CuL]center dot(ClO4)(2)

The [CuL](ClO4), complex, L = 1,4,7,10-tetrakis(2-pyridylmethyl)-1 ,4,7,10-tetraazacyclododecane, was prepared in EtOH and characterized. The crystal structure of the complex was determined by single-crystal X-ray analysis. The coordination geometry about the copper ion can be described as a strongly distorted octahedron, with Cu-N distances ranging from 2.01(1)-2.82(1) Angstrom.