00:02
In this question, we are interested in the isomers of hexane.
00:07
So first of all, we need to know what an isomer is.
00:11
Isomers refer to two or more structures with the same chemical formula, but a different connectivity, meaning the atoms are connected differently.
00:47
So we're interested here in hexane.
00:50
We want the isomers of hexane.
00:52
Well, as we look at the name hexane, the hex prefix means six, and the a -n -e tells us it's an alkane.
01:08
Well, alkanes have the general formula c to the n, h to the 2n, plus two, because alkanes are hydrocarbons, meaning they contain carbon and hydrogen only, and being an alkane, it's going to be all single bonds.
01:37
All right, so if n hex means 6, that means n is 6 here.
01:43
So the formula for hexane is c6h, 2 times 6 is 12, plus 2 gives us 14.
01:54
Okay, so we want the isomers of c6h14.
02:00
All right, well, i'm going to start off with what is known as normal hexane, meaning all six carbons are in a continuous chain.
02:13
Now i'm not in the interest of time i am not going to draw in the hydrogens.
02:18
You may need to for your particular instructor.
02:22
A lot of times instructors don't require you to put in the hydrogens.
02:25
I'll just put in the little bonds here.
02:27
So each of those bonds is a bond to a hydrogen.
02:30
So we see that there are 14 hydrogens there.
02:33
So this would would be normal or n hexane, meaning straight chain or continuous chain.
02:43
Okay, that is the only one that is really going to be a hexane because from this point on, we are going to have carbons, one or more carbons broken off of the main chain and added as a branch.
02:59
So for my next one, i'm going to have a five carbon chain with a ch3 coming off of that second carbon.
03:14
So if we name this five carbons in a chain is a pentane.
03:18
And we have a carbon or a methyl group coming off of that second carbon in the chain.
03:23
So we'd call this two and it's a methyl group...