This video is one of the best when it comes to naming functional COMPOUNDS... Thanks for your videos.. very easy to understand and straight to the point
Sir in the example of rule number 8 why can't we number the parent chain containing COOH AND OH group.. because it's the chain having more number of functional group?!
U see which chain has more functional groups only if there are more than one chains which have principal functional group. If there is clearly a chain which has principal functional group and is longest then don't care about other functional groups.
Numbering should be done from that direction which gives sum of the locants minimum. So the numbering shown there gives a total of 3 +4 while if we give numbering in other direction it will be 2+3 which is less therefore it is correct. That's why it is 3-ethyl-2-methyl.
Parent chain should be selected as the longest chain possible that includes principal functional group. In the example there, COOH is included in 6 carbon chain which is the parent chain. But if try to include -OH we will get only 5 carbon chain which is not correct. Suppose if the parent chain has only 5 carbons and two possibilities are there in selection of parent chain, then we have to select the parent chain such that it contains both COOH as well as OH groups. Hope it is clear now.
No it shouldn’t be because it needs the lowest number locations for the subsequent groups hence it would be numbered from the other direction thus 3-ethy-2-methyl-pentane
When CHO group is included in the main chain, it is indicated with prefix "-oxo". At the example given in the video, CHO is not considered as side chain but it is included in the parent chain as it gives longes chain with two functional groups. So it will be indicated with term "-oxo". Hope it is clear now. Thanks for watching
