Organic chemistry help?

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justineromaine
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#1
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#1
Hi,
Could anybody help me identify these skeletal formulae?
Name:  ORGANIC CHEMISTRY.jpg
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I'm really struggling with this !
Thanks!
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Gerry-Atricks
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Number of lines/branches equals length of carbon chain so first one has 3 of them and so is prop- , the two lines indicates a double bond so it ends in ene so this is prop-2-ene, understand?
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Alextox
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#3
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From left to right

(E)-but-2-ene

butan-2-one

butane

butyraldehyde

butyric acid
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an_atheist
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(Original post by justineromaine)
Hi,
Could anybody help me identify these skeletal formulae?
Name:  ORGANIC CHEMISTRY.jpg
Views: 80
Size:  4.0 KB
I'm really struggling with this !
Thanks!
The ends of each line represent a carbon atom. the number of lines represent the number of carbon-carbon bonds present.

Are you having difficulty with the functional groups at all?
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bleak_rage
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(Original post by justineromaine)
Hi,
Could anybody help me identify these skeletal formulae?
Name:  ORGANIC CHEMISTRY.jpg
Views: 80
Size:  4.0 KB
I'm really struggling with this !
Thanks!
Hi!

You can use the following link to learn about the order of functional groups as in, which one should be given the highest priority while naming them.

http://www.masterorganicchemistry.co...-nomenclature/

Hopefully this helped!
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TheFailedMedic
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Using IUPAC naming you get (from left to right):

1. but-2-ene (Alkene - C=C)

2. butan-2-one (Ketone - RCOR)

3. butane (Alkane - C-C)

4. butanal (Aldehyde - RCHO)

5. butanoic acid (Carboxylic acid - COOH)
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Gerry-Atricks
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(Original post by Alextox)
From left to right

(E)-but-2-ene

butan-2-one

butane

butyraldehyde

butyric acid
The last two are wrong ( or at least uncommon, should be butanal and butanoic acid) and we try to help people understand in study help not give them the answers.
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Alextox
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(Original post by glad-he-ate-her)
The last two are wrong ( or at least uncommon, should be butanal and butanoic acid) and we try to help people understand in study help not give them the answers.
The last two are right and those names are not uncommon. Take as example the ethanoic acid, it's more common to say acetic acid. This also happens with formaldehyde (it's weird to call it methanal). However, all those nouns are accepted by the IUPAC.

Perhaps I should have given to the user a small introduction to organic chemistry nomenclature rather than the answers. Perhaps, the user can name others structures likewise
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Gerry-Atricks
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(Original post by Alextox)
The last two are right and those names are not uncommon. Take as example the ethanoic acid, it's more common to say acetic acid. This also happens with formaldehyde (it's weird to call it methanal). However, all those nouns are accepted by the IUPAC.

Perhaps I should have given to the user a small introduction to organic chemistry nomenclature rather than the answers. Perhaps, the user can name others structures likewise
Oh thanks for that then but all the mark schemes ive looked at in A level chemistry call aldehydes by the -al suffix and carboxylic acids by the oic acid suffix so they may lose a mark by not using the common answers, though yours are technically right, its better safe than sorry with these specific mark schemes
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Alextox
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(Original post by glad-he-ate-her)
Oh thanks for that then but all the mark schemes ive looked at in A level chemistry call aldehydes by the -al suffix and carboxylic acids by the oic acid suffix so they may lose a mark by not using the common answers, though yours are technically right, its better safe than sorry with these specific mark schemes
You're welcome

I totally agree with you. Therefore answer like they taught you in order to avoid any mishap


Good luck!!!
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Gerry-Atricks
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(Original post by Alextox)
You're welcome

I totally agree with you. Therefore answer like they taught you in order to avoid any mishap


Good luck!!!
Thank you
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Bulletzone
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#12
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(Original post by TheFailedMedic)
Using IUPAC naming you get (from left to right):

1. but-2-ene (Alkene - C=C)

2. butan-2-one (Ketone - RCOR)

3. butane (Alkane - C-C)

4. butanal (Aldehyde - RCHO)

5. butanoic acid (Carboxylic acid - COOH)
The answers you need.
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