Organic-inorganic hybrid compound ethylenediamine tetrachlorocuprate([H3N(CH2)2NH3]CuCl4) were prepared by liquid phase technology respectively with water and ethanol/water as solvent.Their structure and performance were characterized by X-ray diffraction(XRD) and differential scanning calorimetry(DSC).The results indicate that different solvent has significant influence on the crystal structure and property of solid-solid phase transition of the product [H3N(CH2)2NH3]CuCl4.In ethanol/water medium

the crystal show a preferred orientation along a-axis

and the product prepared in ethanol/water medium show significant layered structure and a higher solid-solid phase transition enthalpy values.