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ChemistryOrganic Chemistry

Degree of Saturation Formula? Calculate Organic Degrees of Unsaturation

For OpenStax Problem 7-2, DBE = (2C + 2 + N − H − X)/2 gives 5, 5, 3, 1, 6 and 5. Oxygen is ignored; halogens count like hydrogen.

Question

Calculate the degree of unsaturation in each of the following formulas:

(a) C6H5N\mathrm{C_6H_5N}

(b) C6H5NO2\mathrm{C_6H_5NO_2}

(c) C8H9Cl3\mathrm{C_8H_9Cl_3}

(d) C9H16Br2\mathrm{C_9H_{16}Br_2}

(e) C10H12N2O3\mathrm{C_{10}H_{12}N_2O_3}

(f) C20H32ClN\mathrm{C_{20}H_{32}ClN}

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Evidence boundary

The six formulas and their order are from OpenStax Problem 7-2. This page interprets the search phrase in its organic-chemistry context as degree of unsaturation, not soil saturation. The results count rings and multiple-bond equivalents for ordinary neutral formulas; they do not determine unique molecular structures or establish aromaticity.