Abstract
The adduct formation between dimethyl- and dibuthyltin diisothiocyanate
and 1,10-phenanthroline and 2,9-dimethyl-1,10-phenanthroline were
investigated. It was found that the reaction of R2Sn(NCS)(2) (R = Me,
n-Bu) with 1,10-phenanthroline in a 1:1 M ratio led to the formation of
simple adducts of Me2Sn(NCS)(2)(phen)center dot CH3CN (1) and
Bu2Sn(NCS)(2)(phen) (2), for R = Me and R = n-Bu, respectively.
However, the reaction of 2,9-dimethyl-1,10-phenanthroline with
R2Sn(NCS)(2) (R = Me, n-Bu), instead of adducts, resulted in the
formation of an organostannate salt, (C14H13N2)(2)Me2Sn(NCS)(4) (3),
and dimeric stannoxane, Me-2(NCS)SnOSnMe2OCH3(2) (4), for R = Me and
(C14H13N2)NCS (5), and Bu-2(NCS)SnOSn-R2OBu(2) (6), for R = n-Bu.
Single crystal X-ray structural analyses were carried out for complexes
1, 3, 4, and 5. The crystal structures results of 1, 3, 4, and 5 along
with the H-1, C-13 and Sn-119 NMR and IR spectroscopic measurements of
all the products are used to discuss the effect of the substituent of
1,10-phenanthroline on complex formation. The results show that the
central tin atom of the stannate salt (3) is not bonded to the two N
donor atoms of the ligand species, and the moderately bulky substituent
at the 2 and 9 positions of 1,10-phenanthroline ligand exerts a profound
influence on the nature of the complexes and their formation. (C) 2013
Elsevier B. V. All rights reserved.
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