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Thermokinetic studies of organotin(IV) carboxylates derived from para-methoxyphenylethanoic acid

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Abstract

Thremogravimetric (TG) studies of a new series of organotin(IV) carboxylates of the general formula RnSnL4-n (where R = CH3, C2H5, C4H9, C6H5, C6H11 and C8H17, n = 2, 3 and L = para-methoxyphenylethanoate anion) have been carried out. Horowitz and Metzger method has been used to calculate thermokinetic parameters. It has been found that diorganotin dicarboxylates have larger activation energy than those of corresponding triorganotin carboxylates. Furthermore, the activation energy, Gibb’s free energy, entropy and enthalpy of diorganotin compounds shows the following trend, (CH3)2SnL2 < (C2H5)2SnL2 < (C4H9)2SnL2 < (C8H17)2SnL2. This is attributed to steady increase in chain length of the alkyl groups. However, triorganotin compounds do not show such behavior.

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Authors and Affiliations

  1. Department of Chemistry, University of Sargodha, Sargodha, 40100, Pakistan

    M. Danish, N. Ahmad & N. Zahara

  2. Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan

    S. Ali & N. Muhammad

Authors
  1. M. Danish
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  2. N. Ahmad
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  3. N. Zahara
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  4. S. Ali
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  5. N. Muhammad
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Correspondence to M. Danish.

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Danish, M., Ahmad, N., Zahara, N. et al. Thermokinetic studies of organotin(IV) carboxylates derived from para-methoxyphenylethanoic acid. JICS 7, 846–852 (2010). https://doi.org/10.1007/BF03246078

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  • DOI: https://doi.org/10.1007/BF03246078

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