00:01
Okay, we're going to explain why an alkyne or an aromatic hydrocarbon can't be an cystotransycemer.
00:07
So we've looked at the qualifications of a cyst of trans isomer.
00:22
One qualification is that the carbon has to be fixed, and this means that it can't rotate.
00:37
So obviously an alkyne or an alkyne can't rotate.
00:42
But if you look at alkyne, let's say we add the structure.
00:55
So we do have the cis isomer here, but this carbon atom is able to rotate.
01:01
Across this single bond and as a result it's easily going to just rotate to the trans configuration so it's never really just a cis or trans configuration so we're just moving back and forth it's never fixed another one is that it can't be plainer and the last qualification is that the carbon atom of the alkin has to have two different groups attached to it so again if we look at the alkyne it is fixed it's not able to move the is of triple bond or we at least have the double bond so it can't move, but we have that.
01:57
And it's obviously not planar, so we're good there.
02:00
But we don't have two different groups.
02:01
We only have a bond to one other atom, the hydrogen, because we already have three bonds to the carbon...