Crystal structure and 63Cu NQR of bis[1-aza-2-(1-pyrrolidinyl)] copper(I) chloride and bromide

The crystal structures and Cu-63 NQR spectra of two complexes of Cu(I), bis[1-aza-2-(1-pyrrolidinyl)] copper(I) chloride and bromide, 1 and 2, are reported. Like the corresponding iodide, both complexes are planar two-coordinated cations with a linear N-Cu-N fragment. Neither the crystal structure nor the Cu-63 NQR spectra show any evidence of coordination between the halide anion and the Cu+ centre. 1: [Cu(C6H12N2)]Cl-+(-), monoclinic, C2/c, a = 15.528(1), b = 6.9027(2), c = 15.112(2) Angstrom, beta = 116.892(2)degrees, Z = 4; 2: [Cu(C6H12N2)(2)]Br-+(-), monoclinic, C2/c, a = 15.269(1), b = 7.0807(2), c = 15.302(2) Angstrom, beta = 115.726(2)degrees, Z = 4. (C) 1998 Elsevier Science S.A.