Syntheses and crystal structures of N,N′-bis(2-hydroxybenzyl)piperazine, its nitrate salt and copper(II) acetate complex

Abstract

The syntheses and structures of N,N′-bis(2-hydroxybenzyl)piperazine (C18H22N2O2, 2), its nitrate salt (C18H24N4O8, 2a) and copper(II) acetate complex (C22H26N2O6Cu2, 2b) are described. Compound 2 was characterized by 1H and 13C NMR and mass spectrometry. The structures of all compounds were determined by X-ray structure analysis. Crystal data: 2: monoclinic, space group P21/c (No. 14), a=6.745(6), b=8.796(2), c=13.407(2) Å, β=98.99(3)°, V=785.7(7), Z=2; 2a: orthorhombic, space group Pbca (No. 61), a=9.773(4), b=23.332(4), c=8.963(1) Å, V=2035.4(9). Z=4; 2b: monoclinic, space group P21/n (No. 14), a=12.197(4), b=7.061(3), c=13.300(2) Å, β=98.83(3)°, V= 1131.9(7), Z=2. Compound 2b has a polymeric structure via five-coordinated copper atoms. © Acta Chemica Scandinavica 1997.