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Edited by Deus Avertat:
5/6/2014 5:05:10 PM
2
Most of them seem fine. Should 4 not be 3,3-dimethylhexane? I would also tend to expand 6 (i.e. draw out all the bonds), as I've often heard that it can be misinterpreted with the bonds going to hydrogen, rather than the carbon, but I'm not sure if that's necessary.
[i]Edit: again, I'm not sure how pedantic this is (or even wrong?) but for 1, I'm not sure you'd usually have the "-" before hexane, they're normally used between numbers and the groups, aren't they?[/i]
[i]Edit 2: I know the solution isn't always available, particularly for more complex molecules, but can I suggest a site like wolframalpha to check some solutions. Assuming the molecule is recognised (I find it's around 50/50) you'll be able to see the full structure of the molecule you've named.[/i]
English
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Edited by AngryBrute: 5/6/2014 5:05:52 PMNo not on 4. Because there is only one Methyl group in it. The other one is a Propyl group. And Hexane would mean that there are 6 Carbons in the structure. As for question 6, thats really as far as it can go. The use of the Ch3, Ch2, Ch is to indicate how many bonds it needs to get a total of 4 since Carbon can only have 4 bonds in total. EDIT: That is how my instructor says it needs to be. We have to use the "-" between each one except for the final one like "2-Chloro-3-Ethyl-4-Methylhexane"
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Edited by Deus Avertat: 5/6/2014 5:27:02 PMI may well be either misreading (reading sideways isn't all that easy!) or misunderstanding, but I'm not quite following either point, so my apologies. In naming a molecule, the first step is to find the longest carbon chain, which is three carbons on top, followed by the three below. That would form a continuous chain of six (so hexane), with the CH3 above and to the left (so 3,3-dimethyl), as they do not form part of the longest carbon chain? For 6, I know why you've used them, I simply meant that I'd normally draw it as H | C - C - C | H etc. I know it is permitted to use CH3, CH etc, but that's my preference, particularly as at the end of a molecule, if written that way, I've always seen it said that it should be H3C on the left, similarly to how you may have come across avoiding writing OH the wrong way around. Drawing out the bonds makes it clear exactly where each of the four bonds is, and tends to be easier to check, in my experience, but that's far from essential and depends on the context. The ordering of CH3/HC3 has, however, definitely been brought up as an issue from what I've seen, but it may not affect you. For 1, that's my point? I agree with your instructor, from that, the dashes are used between numbers, but for this one it looks like you've written the end as "methyl-hexane" rather than just methylhexane? [i]Edit: Wow, this is long. My bonds didn't come out as planned, but I hope it helps clarify what I meant.[/i]
