Hi nerdz,

I have a question about some general mechanics ''maybe''
even Quantum mechanics.

I have read in a thread the following (from Sedit):

There is something VERY important you
obviously have not learned about organic
chemistry yet. Even though the drawling of these
molecules looks rigid they really rotate around the
axis of each carbon and are never truly stable.
This is the reason that many times rings are put
in place to force a chain to hold a specific
structure so that they can bind to a receptor in
ONLY that was. Amphetamines have a few
different analogs where there is a ring of some
sort on the chain to stiffen it and make it shape
better in the receptor. You can think of an alkyl
chain to be similar to a floppy piece of rope with
nodes in it at each carbon.
Both structures you have seen are correct and
one in the same because this terminal carbon
spins like a helicopter so to speak.



My question is:
Why are they rotating, and why only around the carbon, like he said ?
Are they following the bounding electrons (ie. of the
carbon) ?
I have stressed google with it,
but only found found the specifics of molecule dynamics,
and not why they move in the way Sedit describes it !

Sorry if im too lazy,
help me if youre not !