Question

Write the structural formula for each of the following.
A $2^{\circ }$ alcohol with the formula $C_3{H}_{6}O$.

Answer 1

$D.U.=1^{\circ },1D.U.$ suggests unsaturated alcohol or cyclic $2^{\circ }$ alcohol three $C$ atoms; $2^{\circ }$ alcohol cannot be unsaturated, so it is cyclic.