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Current time:0:00Total duration:6:51

Amine naming introduction

Video transcript

in this video we're going to talk a little bit about a means about a means and these are just organic compounds where you have a nitrogen bonded to groups that contain carbon so if I were to just draw some a means right here you could have something like this where you have a nitrogen bonded to two hydrogen's and then maybe some type of carbon chain maybe it's just one carbon right here so maybe you have a carbon which is also bonded to three hydrogen's like this in this case you would have a primary amine if you have the nitrogen bonded to two carbons so if you have something like this a nitrogen bonded to two carbons so it has one carbon chain right there and I'm just drawing methyl groups here because the chain could keep keep on going maybe you have two like that and then you have a hydrogen right there this would be a secondary amine and then finally you could imagine if you had it bonded to three it would be a tertiary amine this is just to get you introduced to the terminology to the terminology ch3 just like that now like all of the other new groups or new types of compounds that we've explored what I want to do is just introduce you to the naming of it because one that lets you recognize them when you hear their names but it also I think on some level familiarizes you with your structure so let's let's do a couple of naming examples I drew these ahead of time and in general just to remember a means are pretty high priority group out of all of the things that we've learned so far the only thing that is a higher priority is actually the alcohols or actually the thiols which I'm not even I don't even remember if I did a video on it but thiols are just like alcohols but instead of an oxygen you have a sulfur so this comes right after those so let's think about this one right here so we always want to look for our longest carbon chain and our longest carbon chain is right here one two three four five six seven carbons you want to start numbering it closer to the functional group 1 2 3 4 5 6 and 7 and then the functional group is on the two is on the two carbon right there so first of all seven carbons we would use the prefix HEPT so it'd be hep then let me write that down so it'd be hep tan hep hep tan and since our functional group is in a mean in this situation it has higher Pro it has a higher priority than the fact that this is an alkane so this will actually define the suffix this will define the suffix so we would then say well then on the two carbon on the let me do this in a new color on the two carbon right over here we have the amine group so it's hep tan to hep 10 to amine hep 10 to amine and we're done we know that we have an amine group on the two carbon now let's do this one this one's a little bit more hairy so first of all we always want to figure out the longest carbon chain and it looks like this this the ring is going to be the longest carbon chain we have one two three four five six carbons so this thing right here is the longest chain we only have one two carbons right there one carbon one carbon right over there so our root our root is going to be cyclo hexane so our root is going to be cyclohexane I want to make sure I have enough space cyclo cyclo hexane and then once again it's an amine so this is going to take higher priority it's going to so we're not just going to put an e at the end and call the cyclohexane this takes higher priority this takes higher priority so it'll actually define the suffix so nu and and another thing to think about is you could say okay this is going to be the 1 this is going to be the 1 carbon and so you could call the cyclohexane one amine but in general if this is defining it you always assume that you're going to start numbering at right there at number one so you could just call this cyclohexane amine xn I mean if it's written like this you assume that the one carbon is where the a mean group is attached now what else do we have on this thing we took care of the a mean we took care of the cycle well we have this ether right here and this ether has one two carbons if it was just a two carbon chain it would be ethane but since it we have it's an ether it's bonded to this oxygen we call this Earth oxy so that right there is a foxy Knoxy and we're going to think about how we're going to number this so I'll leave that alone now what are these over here well this is a methyl group that's a ch3 implicitly you don't see a drama there's a carbon there and all of car if carbon is neutral it has to have four bonds and if you only draw one of them the other three are assumed to be two hydrogen so this is a methyl group this is a methyl group and then this is also a methyl group this is also a methyl group so we have dimethyl so this is also a methyl group right over there and when we think about numbering we could number from one to three or we could start numbering one two three and in general you want to go numbering in the direction where you hit the functional group first so we want to go one two three four and five so this right here is 5a thocks this is five ethoxide and then this is one to dimethyl these two combined these two combined you would call this one , - die-die methyl and then when you want to lift list them in order you the epoxy would take precedence in alphabetical because the dye you shouldn't count in the alphabetical order your look really looking at this is just saying two methyl so you really just want to look at the two of whatever you're talking about M comes after E in alphabetical order so this is going to be this is going to be five atok C actually let me just rewrite the whole thing so this is going to be five ethoxide five five epoxy one to dimethyl one to dimethyl die dimethyl cyclohexane amine dimethyl cyclo cyclo hexane amin amin and we're done and we're done this was probably one of the longest words we've used in naming but hopefully you see when you break down the different pieces it actually makes sense that it represents this molecule