General formula of acyclic alkenes (one double bond) (CnH2n)
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CnH2n
What each symbol means
| Symbol | What it stands for |
|---|---|
| n | Number of carbon atoms (n ≥ 2 for stable acyclic alkene) |
When to use this
One C=C double bond, acyclic, no rings. Each extra π bond or ring changes H count by −2 from this baseline.