Thermal, physicochemical and spectroscopic studies on some novel organic complexes obtained by green synthesis
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The solid–liquid equilibrium phase diagram and thermochemical studies on two binary organic systems involving N-methylurea (MU) with 4-nitrophenol (NP) and 3-nitrobenzoic acid NBA were studied. Both systems show the formation of an equimolar intermolecular compound (IMC) and two eutectics (E1 and E2) one on either side of the IMC. Thermodynamic parameters such as heat of mixing, entropy of fusion, roughness parameter, interfacial energy and excess thermodynamic functions of intermolecular compounds and eutectics were calculated using the experimentally determined enthalpy of fusion by the DSC method. The spectroscopic studies, FTIR and NMR, of both the IMCs along with their parent compounds revealed the hydrogen bonding association between the parent moieties forming the complex. The findings were also confirmed by the appearance of new peaks in the powder XRD of the complexes in addition to their parent compounds.
KeywordsEutectic Green synthesis Intermolecular complex Phase diagram Thermochemistry
- 2.Anastas PT, Warner JC. Green chemistry: theory and practice. New York: Oxford University Press; 1998.Google Scholar
- 12.Chemla DS, Zyss J. Nonlinear optical properties of organic molecules and crystals academic. New York: Elsevier; 1987.Google Scholar
- 13.Maeda M. Laser dyes. New York: Academic Press; 1984.Google Scholar
- 22.Dean JA. Lange’s handbook of chemistry. New York: McGraw-Hill; 1985.Google Scholar