now on to the cyc alanes or the ring Masters okay they're going to be under the guidance of the cyll hexane chery and they're always going to specialize in forming closed Rings right and networks of rings as well so a lot of the functions of um our cyclo well really cyc alkanes and Wells are going to be like they could be solvents they're part of the building blocks of biomolecules they can be part of antiviral drugs anesthetics things like that the goal is that when you have a cyc alane if you always have a cyclical Alan with one more rings in it structure and normally we would just have single bonds as you can see here you can have one ring or you can have more than one ring okay now when it comes to naming CYO alanes guess what you're going to name them just like the alkanes but got to have some changes and guess what that change is going to be you have to include a prefix in the root and that prefix is going to be cyclo so let's say we have this one here it's going to be 1 2 3 four five six carbons so that's going to be hex a well because it's cyclical it'll be cyclo hexane so the root you have to add a prefix to it also the actual ring structure needs to be the longest carbon chain so if you have a ring like this which is only one two three carbons as you can see the longest carbon chain is going to be 10 carbons here so this actually will act as a substituent so just like we've seen everywhere else when you have like a one carbon substituent it's called methol You're ending with that y l well guess what when we have like a three carbon ring here that means we're going to have cyclo propane and if I make this a substituent it'll be CYO proen right so it's always going to end with that yl okay folks again let's get into some some examples of how to name cyc hexan I keep on saying cyoh hexanes because I'm like looking at this example but I want to say cyc alanes in general okay so like everything else you have a prefix you have a root and you have a suffix and we know when we're dealing with CYO Al CHS the cyclo has to be a part of the root first so you have to be cyc cyoh hex cyc pint etc etc the CYO has to be added to that root okay so that's the main thing that's going to really change everything else rules are the same so let's go ahead and get it we want to make sure that our cyclo or the cyclical part is the longest carbon chain so as you can see we have one two uh one two 3 four five six that's going to be six carbon this is only two carbon attached to this this is only one carbon attached to that as well so the next thing you want to tell yourself okay I know I have my six carbons now I need to basically add my root because this is going to be cyclical I have to have my cyclo hex all single bonds a okay so cyc hex a I got my root and I got my suffix the prefix is what we got to work okay so the prefix is going to be everything that is outside of the parent chain so this is a substituent methyl here one carbon there's two carbons here so that's going to be eth now when it comes to naming we know that ethyl is going to be an alphabetical order so that one is going to come first and guess what when it comes to trying to number the ring that's another way that you can figure out how to number B so some people are like well how do I number it the way you number it is you first look at the substituent you figure out um what it is of course halogens are going to be more you know they're going to be more favored over like other substituents like these alcal groups but when you only have alal groups that you see here you go by alphabetical order so the eth group is here that means I want to have the lowest carbon number on substituent so it be one okay and then of course you want to have the lowest number on all the other substituents so if I was to go one 2 3 4 five here it'll be a five ethyl method but I want to make sure I have the lowest numbers so I'll have 1 2 3 4 5 and six so I have on carbon number one I have eth group and on carbon number three I have a methyl group so I just would put this all in alphabetical order 1 D ethyl D3 d methyl cyclohexane there we go now let's go ahead and get to this one again we want to make sure we have that root and we want to make sure that the part the cyclical part is the part of the longest carbon chain one 2 3 four five okay we only have two carbons here and we have one carbon here so that means we do have a five carbon cyclical part so five carbon is going to be pent so we need to make sure we have cyclo it's all single bonds so cycl pint t as you can see our root has changed slightly because we changed the prefix now we got to focus on the substituents so we have a carbon here one carbon which is a methyl group and then we have a two carbon substituent here which is going to be ethyl group how do we number them want to have the smallest numbers we can start here at Carbon number one 2 3 four and five so at Carbon number one I have an ethal group at Carbon number two I have a methyl group so the name of this will be one- ethy okay two- methyl cyop pint and I do want to add just like with the hallo alkanes the cyc alkanes you can means that you can also have um double bonds and seal bonds but we're not going to be focused on that for our course we're only going to be focused on things that you will see in the examples in the lecture okay folks