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ChemistryOrganic Chemistry

Degree of Unsaturation: Draw Structures for C4H8, C4H6, and C3H4

Calculate degrees of unsaturation of 1, 2, and 2, then draw compatible alkene, alkyne, diene, cyclic, and bicyclic structures.

Question

For each molecular formula below, calculate its degree of unsaturation and draw as many compatible structures as you can:

(a) C4H8\mathrm{C_4H_8}

(b) C4H6\mathrm{C_4H_6}

(c) C3H4\mathrm{C_3H_4}

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Evidence boundary

This preserves all three formula calculations and the structure-drawing requirement of OpenStax Organic Chemistry Problem 7-1. The diagrams and enumeration are independently constructed and checked by carbon valence, implicit hydrogen counts, and graph cycles. They use conventional connected, neutral, closed-shell hydrocarbons; radicals, ions, disconnected fragments, and exotic bonding are outside this introductory scope. No spectra are supplied, so the structures are candidates rather than a uniquely identified compound.