Thermodynamic properties of o-semiquinonato complexes of cobalt, nickel, and copper in the range T → 0 to 350 K View Full Text


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Article Info

DATE

2013-03-02

AUTHORS

A. V. Arapova, M. P. Bubnov, N. A. Protasenko, A. V. Cherkasova, N. N. Smirnova, A. V. Markin, A. S. Bogomyakov, G. A. Abakumov

ABSTRACT

The heat capacity of bis(3,6-di-tert-butyl-o-benzosemiquinonato)copper, (triethylarsine)bis(3,6-di-tert-butyl-o-benzosemiquinonato)nickel, and (triphenylphosphine)bis(3,6-di-tert-butyl-o-benzosemiquinonato)cobalt was determined in the range of 0 to 350 K by precision adiabatic vacuum calorimetry. The temperature dependences of magnetic moments were studied for the last two complexes. The G-transition in nickel complex, which is presumably caused by a loosening of the molecular degrees of freedom, was determined. The standard thermodynamic functions of complexes were calculated according to the obtained data: Cp○, H○(T)-H○(0), S○(T), and G○(T)-H○(0) for the range of T → 0 to 350 K. It was concluded that our analysis of low-temperature heat capacity based on the Debye theory of the heat capacity of solids and the multifractal model confirms the chain-layer topologies of the structures of the investigated complexes. More... »

PAGES

545-551

References to SciGraph publications

  • 2004-01-01. Valence Tautomeric Transition Metal Complexes in SPIN CROSSOVER IN TRANSITION METAL COMPOUNDS II
  • 2004-01-01. Heat Capacity Studies of Spin Crossover Systems in SPIN CROSSOVER IN TRANSITION METAL COMPOUNDS III
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    http://dx.doi.org/10.1134/s003602441304002x

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