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Current time:0:00Total duration:2:53

Video transcript

in the last video we named this molecule using the common names for this group right over here and I thought it would be fun to also use to do the same thing but use the systematic name so in the last video we call this isobutyl but if we wanted to do it systematically we would look at this group we would start at where it is attached to the main backbone and we would think about the longest chain of carbons from there so if we start there we can get 1 2 3 carbons so if we're dealing with 3 carbons then this is going to be a propyl group and we would number it 1 2 3 and we see on the 2 carbon of the propyl group the 2 carbon of the propyl group we have a 1 carbon group right over here so this is a methyl group branching off of the 2 carbon of the propyl group so we could call this we could call this thing the systematic name instead of calling it isobutyl we could call it 2 methyl that's the methyl group right over there let me write this down to 2 methyl propyl 2 methyl propyl 2 methyl propyl and so this is the systematic name and of course there's two of them this is a two methyl propyl right over here instead of an isobutyl we'll call it two methyl propyl and this is another two methyl propyl so instead of writing instead of writing the five-seven dye isobutyl here we can instead substitute that with the systematic name so let's do that let me copy and paste everything else that comes before it so let me let me copy copy and paste it whoops whoops I'm in the wrong layer of my program let me go one layer down so let me copy and paste it again copy and paste there we go so I got that part but now I'm going to write this part differently so we still have stuff we still it's still on the five carbon and the seven carbon of our main chain so 5 comma 7 and we have two of them but when we're you doing systematic naming we won't we won't say die this thing instead we say Biss so 5 five comma seven Biss that says that hey we got two of what I'm about to say this this thing so let me copy you that's in a different layer let me copy and let me paste that this this stuff right over here and then of course we have cyclooctane and then of course we have cyclo cyclo octane and we are done we have named it systematically as well