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Synthesis and spectral characterization of stannocanes of the type [O(CH2CH2S)2SnR2](R=Me1,Bun2,Ph3)

100%
Tarassoli A., Kord A.
Open Chemistry
|
2013
|
vol. 11
|
issue 7
1248-1254
EN
The stannocanes of the type [O(CH2CH2S)2SnR2](R=Me1,Bun2,Ph3) have been synthesized in an improved method by the reaction of R2SnCl2 with 2, 2′-oxydiethanethiol O(CH2CH2SH)2 in molar ratio of 1:1 at the presence of sodium ethoxide in anhydrous ethanol. The reactions are carried out under inert atmosphere. These compounds have been extensively characterized by FT-IR, UV-Vis spectrophotometry, multi-nuclear (1H, 13C, 119Sn) NMR, elemental analysis and mass spectrometry. The obtained data clearly indicates that, there is a strong interaction between oxygen atom of the ligand as a donor and Sn atom of the organotin species as a Lewis acid acceptor. Therefore, the resulted dithiostannocanes possess a transannular secondary bonding and hypervalency at the central Sn atom which leads to an increase in the coordination number of tin from four to five-coordinated tin. [...]
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Macrocyclic host cyclophosphazenes from aminolysis of N3P3CI6 by bis-(2-ortho-aminophenoxyethyl)ether

81%
Tarassoli A., Sedaghat T., Goudarzi H.-R.
Open Chemistry
|
2009
|
vol. 7
|
issue 1
130-133
EN
Aminolysis of N3P3CI6 by an oxodiamine, bis-(2-ortho-aminophenoxyethyl) ether, has been carried out under various experimental conditions and new products with different architectures have been obtained. The reaction in diethyl ether when using a Na2CO3-water interface process gives the mono-BINO as major product. Reaction on Al2O3/KOH leads to the spirocyclic compound, while, when the reaction is carried out in toluene in the presence of NEt3, a mixture of mono- and di-BINO products are obtained. These new products have been characterized by IR, 1H and 31P NMR spectroscopy. [...]
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