 Same thing we have for carboxylic acid write down next Carboxylic acid is No, it's not like that After this Carboxylic acid the suffix is what? Oic acid And in this also we will start numbering from this carbon atom first condition Same thing we have for these four At C double bond O OH what is the name? Methanoic acid We will do that, we haven't done that yet We are just looking at the functional group isomer sorry, commentator Then we will see the priority order of various functional group And then we will move on to the poly functional group This is, there is no priority now we are doing We are just randomly doing through functional group We will see the priority order separately and then we will do the poly group Ok Ok, this is usually like that What happened? So how do you know the chloride is this one? What? So how do you know whether the chloride is the functional group or the other one also? There is no functional group Oh no no no If it is then also COVH is dominating this thing No it's a but it can't be right But there is C also there So it has to come at the end of the chain right? No it's a versus question that it can be an oil light No no it's not, it's not there So it's not because there is an extra C right? No he was asking, can we take it as a functional group? Sir also it's not Obviously the oil light is not there because it was more to the C Only one carbon so this is Methanoic acid What about this one? 1, 2, 3, 4 Butanoic acid this one 1, 2, 3, 4 2 chloro, 2 cyclopropyl butanoic acid Ok Now note you write down this rule is important There are 2 important rules we have in this one Write down If carbon containing functional group If carbon containing functional group Is directly attached to the ring Is directly attached to the ring Then the following suffix will be used Suffix will be used If COOH is attached directly to the ring Then the suffix is carboxylic acid Carboxylic acid If CHO is attached directly to the ring It is carbyldehyde If CL is attached directly to the ring It is carbonitrile Carbonitrile we see the examples on this also If COCl is attached If COCl is attached Or COX is attached Then it is carbonylil Yes COR is attached Then it is alkylcarboxylate COR is ester We will do this R is the alkyl group Alkyl carboxylate If it is ET Suppose ethyl group is present here Then it is ethyl carboxylate If it is COET Then ethyl carboxylate ET is ethyl R is the general word there is alkyl ET is ethyl C2H5 ET will use this for ethyl group If ET is written It is ethyl So it depends upon what alkyl group you have here According to alkyl carboxylate We see some examples See we have this The condition is what if these groups Attached directly on the ring So suppose the ring is this This nomenclature is a bit different Suppose we have COOH attached here It is directly attached So name of this compound is Cyclobutane, not butyl It is cyclobutane Carboxylic acid Cyclobutane is this carboxylic acid When you say carboxylic acid It has one carbon name But if you have this one CH2COOH What is the name of this one? This will be the variation 1 and 2 This becomes substituent now So we will write 2 cyclobutane ethyl noic acid Here we don't write carboxylic acid Because this COOH It is not directly attached to the ring So this is only true when the ring Is directly attached No 2 carbon But what carbon is it? No This also will start coming from this carbon So what is known as the noic acid? What is the name of this carbon? This molecule? Cyclobutane Cyclobutane Cyclobutane Mayor General The name of this one is what? Cyclopentane, carbon dioxide, cyclohexane, carbon nitride, cyclopentane, carbonized strudelite. This one is what? Cyclohex-2ene, carbon dioxide. What is this? Cyclohexane? This functional group has been seconded. So it is cyclohex-2ene, carbon dioxide. This one is... This is second, how is it second? One and two. Because this functional group... Cyclohex-2ene. Sir, is this an NCRT? NCRT? I don't know. Sir, it's not. This thing will not be there. I don't know whether this is an example or not. But this rule is not given in NCRT. Cyclohex-2ene, carbon dioxide. Okay. So whenever the carbon-containing functional group directly attached to the ring, we'll use this surface. Okay. One more important rule we have in this write down. We have done all the rules we have done. Some specific rules we have that we are just looking at. Basic thing is that only. Select the longest chain according to the priority of functional group. Write it down. If more than two... Second point. If more than two carbon-containing functional group... If more than two carbon-containing functional group are directly attached... Are directly attached with unbranched alkene. This is very important. Unbranched alkene is important. Directly attached with unbranched alkene. Then alkene is considered as the principal carbon chain. Then alkene is considered as principal carbon chain. More than two carbon-containing functional group. Okay. Example you see. Suppose we have this. Here we have COOH. COOH and COOH. Who said that's the same function? Not necessary. If it is not then we have to write down the name of the functional separately. But usually till now whenever the question there was they have given the same function. Okay. More than two carbon-containing functional group... Directly attached to the unbranched alkene. Is this right? This is the parent chain of this compound. We won't include this carbon into the parent chain. Usually if you do not know this rule what you'll do. You'll take this carbon to parent chain. So one, two, three, four, five. Like that will do. But since more than two carbon-containing functional group... Are directly attached to the unbranched alkene. Then the parent chain is this. So one, two, three. The name of this compound is... Propane... One, two, three. Dry carboxylic acid. Dry carboxylic acid. If the molecule is this... C-H-O, C-H-O and C-H-O. What is the name? Dry carbon-dehyde. So why carbon-dehyde? C-H-O is carbon-dehyde. So that's what we're doing, right? No, no. In this also we use the same... Suffix will be same. It is carbon-dehyde. Dry carbon-dehyde. So whenever... That's not in the main chain. Yeah, this we can use as a suffix. Here also. For here the condition is what? More than two carbon-containing functional groups. Directly attached to unbranched alkane. That is also important. Branched, unbranched alkane. So it is one propane, one comma, two comma, three. Dry carbon-dehyde. If I place here C-H-O and then... Dry carbon-dehyde. Propane, one comma, two comma, three. Dry carbon-dehyde. What is the name of this compound? One, two, three, four and five. One, two, three, four, five. Dry carbon-dehyde. One last one you see. Just one last one. C-O-E-T. C-O-E-T, ethyl. C-O-E-T, ethyl. Okay. So in this case we'll write this tri-ethyl first. That is so hard. Tri-ethyl, here we have alkyl carboxylate. So ethyl will write first tri-ethyl, propane, one comma, two comma, three carboxylate. One comma, two comma, three carboxylate. First we'll write ethyl, then propane, one, two, three carboxylate. C-O-E-T is the stroke. C-O, that's the second one. So only two. O-E-T is it. E-T is ethyl. This is ester. Ester will discuss it. Next class we'll discuss it. C-O-O-R is an ester function. So one comma, two, three, four, five, six, seven, eight. C-O-E-T is ethyl. C-O-E-T is ethyl. I don't know what this is. So I'll just start the tri-ethyl. C-O-E-T is ethyl. C-O-E-T is ethyl. E-T is ethyl. You don't write that on the tri-ethyl. Write that on the tri-ethyl. C-O-E-T is ethyl. C-O-E-T is ethyl. C-O-E-T is ethyl. So in that question, what if one of them was C-O-E-T. Then you have to write a methyl, we cannot write tri-ethyl-methyl in that way. So next class we will do some more functional group and then we will start with poly functional group or non-inflation, priority order and poly functional group, thank you.