[birch137]

hey guys

this is the first of hopefully many posts

I have looked at the IR spectrum of a compound with an empirical formula of C3H6O and worked out that its molecular formula is C9H18O3

I need help naming it, it has

a c=c  in between the 1st and 2nd carbon

O-H on the 3rd Carbon

aldehyde group on the 3rd carbon

and a C-O bond on carbon 5

any help would be much appreciated

[Borek]

Draw it first.

Is this information given, or are you suggesting it can be all read from IR? 

[birch137]

your right, it cant all be read from the IR spectrum.

 i found what the compound was made up of, then drew it to match the molecular formula, i know there are many possible shapes it could be but the one i described was what i drew and im struggling to name it,  if anybody knows how your help would be much appreciated.

[Arkcon]

There's a lot in your given information to help you narrow down the structure, and from the correct structure you can get the IUPAC name (obviusly, nothing less than a complete correct structure will give you a name):

O-H on the 3rd Carbon

aldehyde group on the 3rd carbon

This is quite telling, right here.  What does this mean?

and a C-O bond on carbon 5

Interesting too.

a c=c  in between the 1st and 2nd carbon

Useful.

I have looked at the IR spectrum of a compound with an empirical formula of C3H6O and worked out that its molecular formula is C9H18O3

This helps you narrow it down.

hey guys

this is the first of hopefully many posts

any help would be much appreciated

This is how we help, we give hints, ask to see what you have already, give you more things to think about, ask you questions, that lead you to discover for yourself, etc.  It's less like cheating, this way.  Can we see the structure you have so far?