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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
Author(s) -
Asadi Zahra
Publication year - 2011
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.20552
Subject(s) - chemistry , schiff base , medicinal chemistry , acceptor , tin , acetonitrile , polymer chemistry , organic chemistry , physics , condensed matter physics
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 ΔS ≠ , and the low ΔH ≠ values suggest an associative (A) mechanism for the acceptor–donor interaction. © 2011 Wiley Peiodicals, Inc. Int J Chem Kinet 43: 247–254, 2011