Thermokinetic Studies of Organotin(IV) Carboxylates Derived from para-Methoxyphenylethanoic Acid

被引：6
|
作者：
Danish, M. [1 ]
Ahmad, N. [1 ]
Zahara, N. [1 ]
Ali, S. [2 ]
Muhammad, N. [2 ]
机构：
[1] Univ Sargodha, Dept Chem, Sargodha 40100, Pakistan
[2] Quaid I Azam Univ, Dept Chem, Islamabad 45320, Pakistan
来源：
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY | 2010年 / 7卷 / 04期
关键词：
Thremogravimetry; Organotin(IV) carboxylates; Thermokinetic parameters; Activation energy; SPECTROSCOPIC CHARACTERIZATION; DERIVATIVES; ANTITUMOR;
D O I：
10.1007/BF03246078
中图分类号：
O6 [化学];
学科分类号：
0703 ;
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)(2)SnL2 < (C2H5)(2)SnL2 < (C4H9)(2)SnL2 < (C8H17)(2)SnL2. This is attributed to steady increase in chain length of the alkyl groups. However, triorganotin compounds do not show such behavior.
引用
收藏
页码：846 / 852
页数：7
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