Thermal analysis study and thermodynamical parameters of some picolinate complexes

• Abd-Elrahim Ben-Aweisha

  Chemistry Department, Faculty of Science, Garyounis University. Libya.

  Author

• Morsy A. Abu-Yousset

  Chemistry Department, Faculty of Science, Alexandria University, Egypt.

  Author

• Saber E. Mansour

  Chemistry Department, Faculty of Science, Omer-Elmoukhtar University. Libya.

  Author

• Fatin M. EIMagbari

  Chemistry Department, Faculty of Science, Garyounis University. Libya.

  Author

In the present work, the complexes were synthesized by the interaction between the picolinic acid with some metal ions [Cr(III), Mn(II) and Ni(II)], then salted-in. The geometrical structures and the chemical formula of the complexes were characterized by several techniques, such as, elemental analysis, molar conductivity, thermal analysis, and thermodynamical parameters. The complexes after salting-in were fairly stable under normal atmospheric condition. Salting-in of chromium picolinate complex shows no change in the coordination sphere. The salting-in of bis- picolinato manganese (II) complex in different simple salts, KI and Guanidinium hydrochloride, gives change in water of crystallization after several days; in all cases the complexes contains one extra water molecule. While in the case of Nickel picolinate it gives the same structure with Guanidinium hydrochloride and KI.

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