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Chemical substance

Chemical formula

{title2=$\mathrm{DBE}$}

= Index of hydrogen deficiency
{synonym}

The number of rings and pi-bond equivalents needed by a conventional closed-shell formula. For a neutral formula containing C, H, N and halogens, it is $(2C+2+N-H-X)/2$; <oxygen> does not change the count. A <carbonyl> contributes one and a triple bond two.

Degree of unsaturation

Past exam of the chemistry B course of the University of Cambridge / 2021 / Paper 1 / B1 / a / i / Solution

Past exam of the chemistry course of the year 3 of the natural sciences course of the University of Cambridge / 2022 / Paper 3 / 39 / e / Solution

Degree of unsaturation ( $DBE$ )

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Degree of unsaturation (DBE)