Cyanato-Kupfer(II)-Komplexe mit organischen Liganden. XV. Verschiedene Koordinationen und Kristallformen der Cyanato-Kupfer(II)-Komplexe mit Urotropin

Cyanato-Copper(II) Complexes with Organic Ligands. XV. Various Coordinations and Crystal Forms of Cyanato-Copper(II) Complexes with Urotropine Four forms of the compound Cu(NCO)₂(urt) · 2 H₂O (α, β, γ, δ) and two forms of the compound Cu(NCO)₂(urt) (α, β) (urt = urotropine) were prepared and studied by X-ray powder technique, as well as by other physical methods. The obtained results indicate that in all the compounds Cu(II) atoms are bridged by bidentate urotropine molecules and bonded always with two nitrogen atoms of NCO groups. The γ- and δ-ihydrate show a pseudotetrahedral configuration, other compounds are five- or sixcoordinate owing to bridging function of NCO groups. Water in the dihydrates is hydrogen bonded in the crystal structure. The crystal structures of α- and β- like γ-and δ-ihydrates are very similar; the last two may be regarded as distortion isomers.