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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 5, Number 1
BKCSDE 5(1)
January 20, 1984 

 
Title
The Effect of Solvent on the Dipole Moments for Organotin(Ⅳ) Complexes
Author
Sangwoon Ahn, Dong Heu Kim, Se Woung Oh
Keywords
Abstract
The effect of solvent on the dipole moments for (chloromethyl) stannanes has been investigated by applying EHT calculation for the isomers of trigonal bipyramidal Sn(Ⅳ)Cl4X and ClnSn(Ⅳ) (CH2Cl)4-n, octahedral Sn(Ⅳ)Cl42X and ClnSn(Ⅳ )(CH2Cl)4-n2X type complexes in dioxane and ethylacetate solutions (X: dioxane or ethylacetate). For Sn(Ⅳ)Cl4 in dioxane solution, the calculated dipole moment for the trigonal bipyramidal Sn(Ⅳ)Cl4X type complex [isomer (b)] is closer to the experimental dipole moment than octahedral Sn(Ⅳ)Cl42X type complexes. This calculated dipole moment suggests that Sn(Ⅳ)Cl4 may have the trigonal bipyramidal structure in dioxane solution. However, the calculated dipole moment for octahedral Cl3Sn(Ⅳ) (CH2Cl)2X type complex [Isomer (d)], ClSn(Ⅳ)(CH2Cl)32X type complex [Isomer(k)] and Cl2Sn(Ⅳ)(CH2Cl)22X type complex [Isomer(h)] are closer to the experimental dipole moments than other isomers for octahedral complexes and trigonal bipyramidal complexes. Such theoretical results indicate that Cl3Sn(Ⅳ )(CH2Cl), ClSn(Ⅳ)(CH2Cl)3 and Cl2Sn(Ⅳ)(CH2Cl)2 complexes may have octahedral structures, Isomer(d), (k) and (h) in ethylacetate solution, respectively.
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