Synthesis, crystal structure and spectroscopic properties of [2,13-bis(1-naphthalenylmethyl)-5,16-dimethyl-2,6,13,17-tetraazatricyclo(14,4, 0~(1.18),0~(7.12))docosane] copper(II) diperchlorate acetonitrile disolvate

摘要

The N-functionalized macrocyclic ligand 2,13-bis(l-naphthalenylmethyl)-5, 16-di methyl -2, 6, 13, 17-tetraazatricyclo(14,4,0~(0.18),0 ~(7.12))docosane (L~3) and its copper(II) complex were prepared. The crystal structure of [Cu(L~3)](ClO_4) _2·2CH_3CN was determined by single-crystal X-ray diffraction at 150 K. The copper atom, which lies on an inversion centre, has a square planar arrangement and the complex adopts a stable trans-III configuration. The longer distance [2.081(2) ?] for Cu-N(tertiary) compared to 2.030(3) ? for CuN(secondary) may be due to the steric effect of the attached naphthalenylmethyl group on the tertiary nitrogen atom. Two Perchlorate ions are weakly attached to copper in axial sites and are further connected to the ligand of the cation through NH?O hydrogen bonds [N?O 3.098 ?]. IR and UV/Vis spectroscopic properties are also described.