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Kinetic studies of the interaction between organotin(IV)chlorides and tetraaza Schiff bases: Synthesis and characterization of some novel tin(IV) Schiff base complexes

✍ Scribed by Zahra Asadi

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
173 KB
Volume
43
Category
Article
ISSN
0538-8066

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✦ Synopsis

In this article the kinetics of the interaction between the teteraaza Schiff bases as donor with organotin(IV)chlorides as acceptor was studied in acetonitrile. Teteraaza Schiff bases are (Me 4 -Bzo 2 [14]tetraeneN 4 ) (tmtaa), (Me 4 -4-CH 3 Bzo 2 [14]tetraeneN 4 ) (Metmtaa), (Me 4 -4-ClBzo 2 [14]tetraeneN 4 ) (Cltmtaa), i.e., [(Me 4 -Bzo 2 [14]tetraeneN 4 )] means that (5,7,12,14-tetramethyldibenzo[b,i][1,4,8,11] tetraazacyclotetradecine) (tmtaa) and organotin(IV)chlorides are methyltin(IV) trichloride, phenyltin(IV)trichloride, dimethyltin (IV)dichloride, diphenyltin(IV) dichloride, and dibutyltin(IV)dichloride. The kinetic parameters and the second-order k 2 rate constants show the donor properties of tetraaza Schiff bases as Me 4 -4-CH 3 Bzo 2 [14]tetraeneN 4 > Me 4 -Bzo 2 [14]tetraeneN 4 > Me 4 -4-ClBzo 2 [14]tetraeneN 4 and also the acceptor properties of organotin(IV)chlorides as PhSnCl 3 > MeSnCl 3 > Ph 2 SnCl 2 > Me 2 SnCl 2 > Bu 2 SnCl 2 . An excellent linearity of k obs vs. the molar concentration of the acceptor, the high span of k 2 values, the large negative values of S = , and the low H = values suggest an associative (A) mechanism for the acceptor-donor interaction.

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