Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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The Molecular Complexes (ⅩI). The Complexes of Toluidines and N-Methyltoluidines with Iodine in Carbon Tetrachloride

  • Published : 1980.09.30
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Abstract

The interactions of iodine with toluidines (o-, m-, and p-) and N-methyltoluidines (o-, m-, and p-) in $CCl_4$ solution have been investigated through spectrophotometric measurements. The results indicate that toluidines and N-methyltoluidines form the one-to-one charge-transfer complexes with $I_2$ in solution. By comparing the values of the formation constants of the complexes, it is concluded that the relative stabilities of the $I_2$-amine complexes decrease in the following orders: p-toluidine >m-toluidine >aniline >o-toluidine, N-methyl-p-toluidine >N-methyl-m-toluidine >N-methylaniline >N-methyl-o-toluidine, N-methyltoluidines >toluidines. These results can be explained by the electron-releasing character and the steric effect of methyl group in the amine molecules.

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References

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