STRUCTURAL STUDY OF BIS(2,6-BIS(PYRAZOL-3-YL)PYRIDINE)NICKEL(II) BY CALORIMETRY AND EXAFS SPECTROMETRY | Zendy

Kristian Handoyo Sugiyarto | Zendy

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STRUCTURAL STUDY OF BIS(2,6-BIS(PYRAZOL-3-YL)PYRIDINE)NICKEL(II) BY CALORIMETRY AND EXAFS SPECTROMETRY

Author(s) -

Kristian Handoyo Sugiyarto

Publication year - 2010

Publication title -

indonesian journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.273

H-Index - 14

eISSN - 2460-1578

pISSN - 1411-9420

DOI - 10.22146/ijc.21889

Subject(s) - chemistry , extended x ray absorption fine structure , pyridine , nickel , perchlorate , complex formation , crystallography , inorganic chemistry , medicinal chemistry , absorption spectroscopy , organic chemistry , ion , physics , quantum mechanics

The stepwise complex formation of 2,6-bis(pyrazol-3-yl)pyridine, bpp, with nickel(II) perchlorate in DMF has been determined by calorimetric method and then followed by EXAFS spectrometry. It was found that the complex formation follows two stepwise pathways namely the formation of mono pyrazolyl-pyridine, [Ni(DMF)3 bpp]2+, and bis pyrazolyl-pyridine, [Ni(bpp)2]2+; the formation constants being log β1 = 6.57, and log β2 = 5.02, respectively, with the total value of log β = 11.58. The final formation of six-coordinated compound was confirmed by EXAFS analysis with coordination number of 5.87(2) and the average of Ni–Nbpp bond length of 2.065(1) A.

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