The compounds Cu-2(RCO2)(4) and Cu-2(RCO2)(4)py(2) [R=CH3(CH2)(n-2); n=14, 16, 18; py=pyridine] were prepared, analysed and characterized by means of DSC calorimetry, thermogravimetry and infrared spectroscopy. Generally, the pyridine complexes are unstable, losing pyridine already at room temperature. Transition from a crystalline to a liquid crystalline phase after heating was observed for all Cu-2(RCO2)(4) compounds but only for pyridine complex of Cu(II) tetradecanoate. However, the melting process was observed for all Cu(II) carboxylate complexes with pyridine. The lower thermal stability of pyridine complexes, than corresponding Cu-2(RCO2)(4) compounds can be explained by structural features.
The compounds Cu-2(RCO2)(4) and Cu-2(RCO2)(4)py(2) [R=CH3(CH2)(n-2); n=14, 16, 18; py=pyridine] were prepared, analysed and characterized by means of DSC calorimetry, thermogravimetry and infrared spectroscopy. Generally, the pyridine complexes are unstable, losing pyridine already at room temperature. Transition from a crystalline to a liquid crystalline phase after heating was observed for all Cu-2(RCO2)(4) compounds but only for pyridine complex of Cu(II) tetradecanoate. However, the melting process was observed for all Cu(II) carboxylate complexes with pyridine. The lower thermal stability of pyridine complexes, than corresponding Cu-2(RCO2)(4) compounds can be explained by structural features.