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Which shows an O-H stretch at a larger wavenumber: ethanol dissolved in carbon disulfide or an undiluted sample of ethanol?

Short Answer

Expert verified

An undiluted sample of ethanol shows an O-H stretch at a larger wavenumber than ethanol dissolved in carbon disulfide.

Step by step solution

01

Hydrogen bonding

Hydrogen bonding is the intermolecular attraction that binds the hydrogen atoms of two molecules.If a molecule has hydrogen bonding, its O-H stretch is observed at a higher wavenumber.

02

Concentration

If the concentration of hydrogen molecules is higher, its O-H stretch absorption wavenumber is high. While a diluted solution with less hydrogen bonding or no hydrogen bonding has less O-H stretching absorption wavenumber.

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