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

被引：0
|
作者：
M. Danish
N. Ahmad
N. Zahara
S. Ali
N. Muhammad
机构：
[1] University of Sargodha,Department of Chemistry
[2] Quaid-i-Azam University,Department of Chemistry
来源：
Journal of the Iranian Chemical Society | 2010年 / 7卷
关键词：
Thremogravimetry; Organotin(IV) carboxylates; Thermokinetic parameters; Activation energy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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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页码：846 / 852
页数：6
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