Synthesis and crystal structure of a New Diamine complex CuCl4(H2tn)†
Dedicated to Professor Chengye Yuan on the occasion of his 80th birthday.
Abstract
In an attempt to synthesize a new pyrimidine complex of copper(II) in a solution reaction of CuBr2 with 2,2′-bis(hexahydropyrimidine) and hydro-chloric acid, we unexpectedly obtained a bright yellow chip-like crystal of CuC4(H2tn) [H,tn=(H3NCH2CH2CH2NH3)2+]. Its structure was determined by single-crystal X-ray diffraction analysis. The crystal belongs to orthorhombic system, space group Pnma, with cell parameters: a=0.7216(2) nm, b= 1.8308(6) nm, c=0.7553(3) nm, V=0.9953(6) nm3, Z=4, F(000)=564, Mr=281.49, D,= 1.879 g/cm3. μ(Mo Ka)=3.204 m−1, R1=0.0248, wR2=0.0575. The analysis of the crystal structure indicates that the complex has a three-dimensional network structure, which is formed by hydrogen bonds and electrostatic interaction.
