Journal of thermal analysis

, Volume 30, Issue 1, pp 167–176 | Cite as

Kinetics of thermal dehydration of some bis-salicylato-diaquo complexes of transition metal ions

  • P. V. Khadikar
  • S. M. Ali
  • B. D. Heda


The kinetics of thermal dehydration of bis-salicylato-diaquo complexes of VO(II), Cu(II), Ni(II), Co(II), Fe(II), Mn(II) and Zn(II) were studied. The activation energies and other kinetic parameters were evaluated. The observed kinetic parameters indicate first-order reactions. The activation energy of the thermal dehydration decreases in the sequence VO(II) > Cu(II) > Zn(II) > Co(II) > Ni(II) > Fe(II) > Mn(II), which is also the sequence for the difference in carboxyl group IR frequency.


Polymer Physical Chemistry Activation Energy Inorganic Chemistry Carboxyl 
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Die Kinetik der thermischen Dehydratisierung von Bis-salicylato-diaquo-Komplexen von VO(II), Cu(II), Ni(II), Co(II), Fe(II), Mn(II) und Zn(II) wurden untersucht. Aktivierungsenergien und andere kinetische Parameter wurden bestimmt. Die beobachteten kinetischen Parameter weisen auf Reaktionen erster Ordnung hin. Die Aktivierungsenergie der thermischen Dehydratisierung nimmt in der Reihenfolge VO(II) > Cu(II) > Zn(II) > Co(II) > Ni(II) > > Fe(II) > Mn(II) ab. In der gleichen Reihenfolge ändert sich auch die IR-Frequenz der Carbonylgruppe.


Изучена кинетика реа кций термической дегидратации диакво-бис-салицилатных комплексов двухвале нтных ванадила, меди, н икеля, кобальта, железа, марг анца и цинка. Оценены энергии акти вации и некоторые дру гие кинетические параме тры, свидетельствующ ие о реакциях первого по рядка. Энергия активации процесса т ермической дегидратации уменьш ается в ряду VO(II) > Cu(II) > Zn(II) > Co(II) > Ni(II) > Fe(II) > Mn(II). Эта же последователь ность коррелируется с наблюдаемым различи ем частот колебаний карбонильной группы в ИК спектрах.


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Copyright information

© Wiley Heyden Ltd., and Akadémiai Kiadó 1985

Authors and Affiliations

  • P. V. Khadikar
    • 1
  • S. M. Ali
    • 1
  • B. D. Heda
    • 1
  1. 1.Department of ChemistryIndore UniversityIndoreIndia

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