Synthesis and characterization of methylammonium tetrachlorocuprate (II) dihydrate crystals by G. Amirthaganesan, M. A. Kandhaswamy, and M. Dhandapani

Crystal Research and Technology

Cryst. Res. Technol. 42, 684 (2007) - Abstract -

Synthesis and characterization of methylammonium tetrachlorocuprate (II) dihydrate crystals

G. Amirthaganesan, M. A. Kandhaswamy, and M. Dhandapani

Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore-641020, India

Keywords	crystal growth, thermal studies, phase transitions, FTIR spectra
PACS	61.10.Nz, 65.40.-b, 68.18.Jk, 78.30.-j
DOI	10.1002/crat.200610889

Single crystals of methylammonium tetrachloro cuprate (II) dihydrate were obtained by slow evaporation method at room temperature. The crystals were characterized through powder XRD, thermogravimetric (TG-DTA), low temperature DSC studies and FTIR and far IR spectra. While the powder XRD confirms the crystallinity of the compound, the TG and DTA studies confirm the formation of the compound in the stoichiometric ratio and the presence of two water molecules of crystallization. The low temperature DSC study indicates a thermal anomaly at -3慢. The ordering of CH₃NH₃ group at low temperature causes phase transitions in the compound. The IR spectra characterize the various chemical bonding and water molecules in the compound. Laser Raman spectral studies under progress would help understand the mechanism of phase transitions at low temperatures.

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