Synthesis, structure, and magnetic properties of bis(3-amino-2-chloropyridinium)tetrahalocuprate(II) [halide = Cl or Br]

Abstract

The reaction of CuX₂ (X = Cl or Br) with 3-amino-2-chloropyridine in aqueous acids (HX; X = Cl or Br) yields bis(3-amino-2-chloropyridinium)tetrachlorocuprate(II) and bis(3-amino-2-chloropyridinium)tetrabromocuprate(II). Both compounds have been characterized by IR, powder X-ray diffraction, single-crystal X-ray diffraction and temperature dependent magnetic susceptibility. The compounds are isomorphous and exhibit weak antiferromagnetic interactions.

Keywords:

• X-ray structure
• Copper complexes
• Magnetic properties
• Tetrahalocuprates

Acknowledgements

S.N.H. received financial support through a Maurine H. Milburn Summer Research Fellowship and a Fredrick and Alice Murdock Summer Research Fellowship. Funding for the powder X-ray diffractometer and SQUID magnetometer was provided by a Kresge Foundation grant, PolyCarbon Industries Inc., and the National Science Foundation. The authors are indebted to Dr. Robert T. Butcher for his assistance with processing SQUID data.