Whats MORE FLUID?

[Transformers]

in Cell membranes,

How would you rank fluidity:

short, unsaturated
long, unsaturated
short, saturated
long, unsaturated

My guess is from order of MOST fluid to LEAST fluid (lets assume unsaturated = about 2 double bonds in the molecule)
short, unsat > long, unsat > short, sat > long, sat

My assumption is that short, unsat has weaker bonding than long, unsat (assuming same number of double bonds) because a longer molecule, by default, would have more intermolecular interactions with itself and thus increase the melting point of the solution MORE THAN the short, unsaturated molecule. However correct me if im wrong.

Thanks.

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[loveoforganic]

I'd say short unsat > short sat > long unsat > long sat.

You didn't define long and short though.

 

[crazybob]

I'd say short unsat > short sat > long unsat > long sat.

You didn't define long and short though.

probably short and long hydrocarbon chains.

 

[loveoforganic]

I meant the number of carbons in each.

 

[crazybob]

I meant the number of carbons in each.

i don't think that matters in this question since it didn't give a number of carbons for a 'short' chain and the number of carbons for a 'long' chain. i think this is just a matter of generalization. we could say 4 carbons for a short chain, and maybe 20 for a long chain.

 

[thebillsfan]

yeah short unsat, short sat, long unsat, long sat. length is probably more important than number of kinks if we're only talking a few doulbe bonds