Springer Online Journal Archives 1860-2000
Abstract The structure oftrans-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7-aceta-tocopper(II) azide, obtained from the corresponding chloride derivative by metathesis, has been investigated by X-ray diffractometric methods. The compound crystallizes in the orthorhombic system, space groupPccn (No. 56),Z=8,a=32.289(4),b=13.187(2), andc=8.679(1) Å. The structure was solved by direct methods followed by a series of Fourier syntheses, and refined by a full-matrix, least-squares procedure to giveR=0.048 against 2935 observed reflections. The ligand shows a good approximation to isomorphism with that of the corresponding monochlorocopper complex. The copper atom, placed inside the cavity of the macrocycle, has an irregular octahedral coordination sphere with two elongated coordination distances.
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