The number of isomeric tetraenes (NOT contain | vedclass

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(C) Step $1$: Reduction of the alkyne using $Na/liq. NH_3$ (Birch reduction conditions) yields the trans-alkene. The starting material is $3-(prop-2-y

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(C) Step $1$: Reduction of the alkyne using $Na/liq. NH_3$ (Birch reduction conditions) yields the trans-alkene. The starting material is $3-(prop-2-ynyl)cyclohex-1-ene$. The product is $3-(trans-prop-1-enyl)cyclohex-1-ene$.Step $2$: Addition of excess $Br_2$ to the two double bonds results in the formation of a tetrabromide derivative.Step $3$: Treatment with $alc. KOH$ causes dehydrohalogenation. Since there are four $Br$ atoms,elimination occurs to form two new double bonds. The resulting product is a tetraene. The side chain double bond can exist in $cis$ or $trans$ configuration. Additionally,the ring double bond can shift to form different conjugated systems. Based on the stereochemistry and the requirement of no $sp$-hybridized carbons,there are $8$ possible isomeric tetraenes.

The number of isomeric tetraenes ($NOT$ containing $sp$-hybridized carbon atoms) that can be formed from the following reaction sequence is.....

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