and Fe catalysts to give poly(1-alkynes), a type of comb-like polymer with a rigid conjugated polyene main-chain. n=4 to 16. The extents of their side-chain crystallization were determined by ...

or simply the longest unbranched chain for alkanes. Remember that, the longest chain can go round a bend. Indicate the position of the functional group with a number, numbering from the end ...

or simply the longest unbranched chain for alkanes. Remember that, the longest chain can go round a bend. Indicate the position of the functional group with a number, numbering from the end ...