A PROTON TRANSFER SELF-ASSOCIATED COMPOUND FROM BENZENE-1,2,4,5-TETRACARBOXYLIC ACID AND PIPERAZINE AND ITS COBALT(II) COMPLEX: SYNTHESES, CRYSTAL STRUCTURES AND SOLUTION STUDIES

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AGHABOZORG H.; MAHFOUZI F.; SHARIFI M.A.; SHOKR ELAHI A.; DERKI S.; SHAMSIPOUR M.; KHAVASI H.R.

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Journal: JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS) Year:2010 | Volume:7 | Issue:3 Page(s): 727-739

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Title

A PROTON TRANSFER SELF-ASSOCIATED COMPOUND FROM BENZENE-1,2,4,5-TETRACARBOXYLIC ACID AND PIPERAZINE AND ITS COBALT(II) COMPLEX: SYNTHESES, CRYSTAL STRUCTURES AND SOLUTION STUDIES

Author(s)

Keywords

COBALT(II) COMPLEX

BENZENE-1

5-TETRACARBOXYLIC ACID

PIPERAZINE

CRYSTAL STRUCTURE

SOLUTION STUDY

HYDROGEN BOND

Abstract

Two compounds containing a proton transfer ion pair (pipzH2)(btcH2), 1, and its Co(II) complex, were synthesized and characterized using IR spectroscopy and single crystal X-ray diffraction method. The chemical formula is {(pipzH2)[Co(btc)(H2O)4].4H2O}n for Co(II) complex, 2, (pipz:piperazine, btcH4:benzene-1,2,4,5-TETRACARBOXYLIC ACID). The space group and crystal system of both compounds are P`1 and triclinic. The proton transfer ion pair 1 was prepared by the reaction between PIPERAZINE and BENZENE-1,2,4,5-TETRACARBOXYLIC ACID, and its Co(II) complex, 2, was synthesized by the reaction of 1 with cobalt(II) sulphate. The complex 2 is a polymeric substance with Co(II) atoms linked by two O atoms from one BENZENE-1,2,4,5- tetracarboxylate. In both CRYSTAL STRUCTUREs, a wide range of noncovalent interactions consisting of HYDROGEN BONDing (types of OH ···O, N-H···O and C-H···O) and ion pairing interactions connecting the various components into a supramolecular structure. There are also C-H···O and C-H···p intermolecular interactions in compound 2 which take part in the stabilization of molecular packing. The protonation constants of pipz and btcH4, the equilibrium constants for the btcH4-pipz proton transfer system and the stoichiometry and stability of this system with Co2+ ion in aqueous solution were investigated by potentiometric pH titrations. The stoicheiometry of one of the most abundant complexed species in solution was found to be the same as that of the crystalline cobalt(II) complex.

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APA: Copy

AGHABOZORG, H., MAHFOUZI, F., SHARIFI, M.A., SHOKR ELAHI, A., DERKI, S., SHAMSIPOUR, M., & KHAVASI, H.R.. (2010). A PROTON TRANSFER SELF-ASSOCIATED COMPOUND FROM BENZENE-1,2,4,5-TETRACARBOXYLIC ACID AND PIPERAZINE AND ITS COBALT(II) COMPLEX: SYNTHESES, CRYSTAL STRUCTURES AND SOLUTION STUDIES. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), 7(3), 727-739. SID. https://sid.ir/paper/282461/en

Vancouver: Copy

AGHABOZORG H., MAHFOUZI F., SHARIFI M.A., SHOKR ELAHI A., DERKI S., SHAMSIPOUR M., KHAVASI H.R.. A PROTON TRANSFER SELF-ASSOCIATED COMPOUND FROM BENZENE-1,2,4,5-TETRACARBOXYLIC ACID AND PIPERAZINE AND ITS COBALT(II) COMPLEX: SYNTHESES, CRYSTAL STRUCTURES AND SOLUTION STUDIES. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS)[Internet]. 2010;7(3):727-739. Available from: https://sid.ir/paper/282461/en

IEEE: Copy

H. AGHABOZORG, F. MAHFOUZI, M.A. SHARIFI, A. SHOKR ELAHI, S. DERKI, M. SHAMSIPOUR, and H.R. KHAVASI, “A PROTON TRANSFER SELF-ASSOCIATED COMPOUND FROM BENZENE-1,2,4,5-TETRACARBOXYLIC ACID AND PIPERAZINE AND ITS COBALT(II) COMPLEX: SYNTHESES, CRYSTAL STRUCTURES AND SOLUTION STUDIES,” JOURNAL OF THE IRANIAN CHEMICAL SOCIETY(JICS), vol. 7, no. 3, pp. 727–739, 2010, [Online]. Available: https://sid.ir/paper/282461/en

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