Synthesis and Characterization of Bis(N,N-dimethyl-2-aminomethylthiophenium) Tetrahalocuprate(¥±)

摘要

Bis(N,N-dimethyl-2-aminomethylthiophenium)tetrah alocuprate(ケ) salt, (dmamtH)2CuCl4 and (dmamtH)2CuBr4 were prepared and characterized by spectroscopic (IR, UV-Vis, EPR, XPS), electrochemical method, and magnetic susceptibility measurement. The experimental results reveal that the compounds have pseudotetrahedral symmetry around copper(ケ) site due to the steric hinderance of the bulky 2-(dimethylaminomethyl)thiophene in the complex. The N-HˇCl type hydrogen bonding is expected in (dmamtH)2CuCl4 from the XPS and IR data. Magnetic susceptibility data show that both of the compounds follow Curie-Weiss law in the range of 77-300 K with negative Weiss constant exhibiting antiferromagnetic interaction between copper(ケ) ions in solid state.