Give the IUPAC names for the following alkanes:
a.

Question

Give the IUPAC names for the following alkanes:

a.

Accepted Answer

All right. Hi ruin. So for this question, lets give the Iupac name of the all canine represented by the model below. Option A says 224 tri methyl pentane. Option B says 22 dimethyl hexane. Option C says 234 tri methyl pentane and option D says 23 dimethyl hexane. So in the case of this model here, right, recall that carbon atoms are represented by the blue spheres, whereas hydrogen atoms are represented by the white spheres. Now, for the purposes of finding the Iupac name, I would rather go ahead and find the line structure or the skeletal structure based on the model give because we call it in a line structure. Hydrogen atoms that are connected to carbons are not actually shown rather they're implied. So by drawing a line structure, first, I can go ahead and simply focus on the carbon atoms and not so much the hydrogens, right. So first, I'm going to find the parent chain, which is the longest continuous chain of carbon atoms. So when I consider the structure here, I can see that the longest continuous carbon chain is composed of five carbon atoms, right? So I would draw a zigzag line, so to speak, that has a total of five corners and open ends because recall that those represent carbon atoms in skeletal or line structures. So now I can get into my substituents, right? And based on how many groups are branching out of my carbon chain, I have three substituents based on my model. One is on carbon two, the other on carbon three and the other on carbon four and all of them are composed of only one other carbon. And just for the record, the five carbon par chain could have been labeled in a different way, but regardless, it should still give you the same compound, right. So now we have the line structure that is going to make our Iupac naming process just a little bit easier if I move this structure slightly upwards, recall that the first step is to always name your parent chain. And because our parent chain was five carbons long, the parent name is going to be Penang. So at this point, we can go ahead and proceed with identifying and naming all substituents present in the molecule. Now, in this case, we have three substituents of the same type, right? Because each substituent is composed of one carbon and three hydrogens recall that as a substituent, we were referred to a ch three group as methyl. But because in this case, we have multiple substituents of the same type, recall that a prefix is necessary to specify their quantity in the molecule itself. Now, because there are three, the appropriate prefix is going to be dry. So instead of saying methyl, I would say try methyl with no space in between them. However, it is not enough to simply say that there are three methyl groups present in this molecule. For every substituent present in a molecule, there has to be one number in the Iupac name indicating its position in the parent chain. So if I number my parent chain here, thats one through five, right? I can see that I have one methyl group on carbon too, one on carbon three and another on carbon four. So that means that each metal group gets a different number to specify their position. So that's two comma three comma four followed by the substituent name itself. So that's two comma three comma four dash tri methyl. Notice how I'm using commas to separate numbers from each other and dashes to separate numbers from letters. So now my third and final step is to combine together the names of my substituents and the parent name with no spaces in between. So that's two comma three comma four dash tr methyl panting again with no space, meaning that all of this is simply one word and there you have it right. Your final answer for the Iupac name is 234 tri methylate, meaning that your answer is going to be option C in the multiple choice. So with that being said, thank you so very much for watching and I hope you found this helpful.

Give the IUPAC names for the following alkanes:
a.

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Give the IUPAC names for the following alkanes:a.

Verified video answer for a similar problem:

Key Concepts

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Give the IUPAC names for the following alkanes:
a.