Crystal structure and photoacoustic spectrum of hexa-methyl-tetraaza-cyclotetradecane-copper(II)-dithiocyanate

Studies of a copper(II) thiocyanate complex are described. The absorption p roperties of the title complex in the solid powder state have been measured by means of photoacoustic spectroscopy, which reflects a rhombic octahedra l geometry around the copper atom, and indicates the CuN6 chromophore. This result is also confirmed by the X-ray single crystal structure determinati on of the compound, which reveals that the central Cu atom is six-coordinat ed by donor N atoms,four of which come from the macrocyclic ligand and the other two from two thiocyanic anions, forming an elongated octahedral geome try structure. This is the first example of copper(II) thiocyanate complexe s with meso-5, 5, 7,14, 14-hexamethyl-1, 4, 8, 11-tetraaza-cyclo-tetradecan e.