Question

how do i find the general formulas for diyne AL ( al represents aldehyde)
diene al

eneyneol

Answer 1

So for example the series

n=1 HCCCHO (C3H2O)
n=2 CH3CCCHO (C4H4O)
n=3 CH3CH2CCCHO (C5H6O)
n=4 CH3CH2CH2CCCHO (C6H8O)
n=5 CH3CH2CH2CH2CCCHO (C7H10O)
so general formula is

Cn+2 H2n O

is that what you are after??