Question

why boiling point of diethyl sulphide is higher than diethyl ether?​

Answer 1

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An organic sulfide (British English sulphide) or thioether is a functional group in organosulfur chemistry with the connectivity C–S–C as shown on right. A sulfide is similar to an ether except that it contains a sulfur atom in place of the oxygen.

The electronegativity of sulfur is only 2.6 whereas hydrogen is 2.2. That means there isn't much of a dipole in the S-H bond, and hydrogen bonding is not significant. Contrast H2

O, with a boiling point of 100∘

C, with H2S and its boiling point of –60 ∘C

The weak polarity of ethers do not appreciably affect their boiling points which are comparable to those of the alkenes of comparable molecular mass.hence have less oiling of 34.6∘C

∴The boiling point of thioether higher than those of ethers.