Magneto-Structural Studies of 2-(2-Ammoniumethyl)-1-m,thyl Pyrrolidinium Tetrachlorocuprate (II)

The (C7H18N2)CuCl4 compound crystallized in the orthorhombic system with space group P 2(1)2(1)2(1) and the following unit cell are: a=7.353(3), b=11.608(5), c=16.666(8) , and Z=4; R=0.0327, wR=0.085. The crystal structure consists of infinite zigzag one-dimensional chains of 2-(2-ammoniumethyl)-1-m,thyl pyrrolidinium dications and distorted [CuCl4](2-) tetrahedral anions along the b axis. The cohesion of the atomic arrangement is ensured by hydrogen bonding (N-Ha <-Cl). The temperature dependence of the magnetic susceptibility was measured in the temperature range of 2-100 K at different magnetic field intensities. The results indicate that the complex exhibit a weak antiferromagnetic coupling between the copper (II) centers. The ferromagnetic ordering is further confirmed by the magnetic field dependence of the magnetization between 2 and 30 K.