[regdude]

Hi!
I have this task, need to tell which group is this compound and what is its name (also need historical name, but will find those later).
1) (HCOO)2Ca    - its a salt right?
2) (C4H9COO)3Al  - also a salt right?
3) CH3CH2CH2COONH2 - its an amide right?
But can't figure out their names :/
 

[sjb]

Hi!
I have this task, need to tell which group is this compound and what is its name (also need historical name, but will find those later).
1) (HCOO)2Ca    - its a salt right?
2) (C4H9COO)3Al  - also a salt right?
3) CH3CH2CH2COONH2 - its an amide right?
But can't figure out their names :/
 

Yes to the first two, what are the constituent ions? Are you sure the last is COONH₂ at the end (2 x O)?

[regdude]

Well it seems so, couldn't it simply be Butanamide ? (sorry if spelled wrong, hard to translate)
Don't even understand the structure, for example the 2. one - is the Al in the middle and organic part is all around?

[sjb]

Well it seems so, couldn't it simply be Butanamide ? (sorry if spelled wrong, hard to translate)
Don't even understand the structure, for example the 2. one - is the Al in the middle and organic part is all around?

Does http://commons.wikimedia.org/wiki/File:Butanamide.png look like your structure, for 3?

Have you tried, for instance http://www.google.co.uk/search?&q=%28HCOO%292Ca ?

[regdude]

I don't know, its only given the way I gave it here.
I named 1. as calcium formate
2. as aluminium butanoate
3. as butanamide
Did try google, but nothing good came up, only reactions without names.

[cupid.callin]

1) first is calcium salt of methanioc anhydride.

maybe called "Calcium methanioc anhydride".

2) why you guys are calling it butanoate ... there are 5 carbons ... so it should be "Aluminium tripentanoate"

3) why is it amide??? amide is CONH2 ...  he gave COONH2!!!!

i dont know if he wrote it by mistake but if its correct the its not amide at all ...

[sjb]

1) first is calcium salt of methanioc anhydride.

maybe called "Calcium methanioc anhydride".

2) why you guys are calling it butanoate ... there are 5 carbons ... so it should be "Aluminium tripentanoate"

3) why is it amide??? amide is CONH2 ...  he gave COONH2!!!!

i dont know if he wrote it by mistake but if its correct the its not amide at all ...

Salts of an acid anhydride? Unlikely, though probably not in this case - they do exist though, see VO(acac)3 or similar. Agreed with the problem with 2) . As to three, that's what I was trying to work out earlier.

[Borek]

Methanoic, not methanioc. And as sjb pointed out, anhydride doesn't make sense.

[Fluorine]

3) CH3CH2CH2COONH2

1-aminooxy-butan-1-one is what the formula implies verbatim. If we assume there is an error, I'd guess 2, 3, or 4-aminobutanoic acid...among a few others possibilities.

[cupid.callin]

Oh!!! come on ... I accept i am bad in spellings ... but we are not in KG anymore . forget that and concentrate on the thing i meant


why salt of carboxylic acid does not make sense?
it is a little unstable but still it exist

CH3CO-O-Ca-O-COCH3 + heat ---> CH3COCH3 + CaCO3 . u havent heard of this rxn

[sjb]

Salts of an acid anhydride? Unlikely, though probably not in this case - they do exist though, see VO(acac)3 or similar. Agreed with the problem with 2) . As to three, that's what I was trying to work out earlier.

My mistake, this of course is a diketone, rather than an anhydride.

Oh!!! come on ... I accept i am bad in spellings ... but we are not in KG anymore . forget that and concentrate on the thing i meant

why salt of carboxylic acid does not make sense?

The problem I had, was that anhydrides are also a class of compounds, so I thought that's what you meant. How do I know you mean carboxylates, and not what you wrote? Salts of carboxylic acids are fine here

[cupid.callin]

But whats the third one?

                   O
                    ll
which group is C-O-NH2

[Fluorine]

Cupid I briefly covered it;

1-aminooxy-butan-1-one is what the formula implies verbatim.

The R-C-O-NH₂ is called an "aminooxy", like a methoxy with the methyl replaced by an amine group. I don't believe that whole end has a common substitution name - I'd gladly be correct however.