The new 18-membered macrocyclicligand 1,5(2,6)dipyridina-3,7(1,4)dipiperazinaoctacyclophane, † shows an allosteric effect upon complexation with copper(I) chloride in aqueous ethanol resulting in an extraordinary coppercomplex, the structure of which has been established by X-ray diffraction analysis.
The crystal structure of a macrocycle containing pyridine and piperazine subunits, and of a Cu(I) complex of its diprotonated cation
作者:Frank R. Fronczek、Paul J. Schilling、Steven F. Watkins、Veronica K. Majestic、George R. Newkome
DOI:10.1016/0020-1693(96)05058-x
日期:1996.5
The 2:2 macrocycle C22H30N6, containing pyridine and piperazine subunits, crystallizes in monoclinic space group C2c with a = 17.614(3), b = 9.696(2), c = 12.662(2) A, β = 111.65(2)°, V = 2010(1) A3, Z = 4. The structure was refined to R = 0.036 for 1863 observed reflections. The molecule lies on an inversion center, and the piperazine subunits have the chair conformation. Surprisingly, this macrocycle