Question

What does it mean by 1,3-Dicarbonyl compound?

Answer 1

It is Acetylacetone aka pentane-2,4-dione Right?

How is this a 1,3-diketone ?

Answer 2

"molecules which contain both functional groups are named as aldehydes and the ketone is named as an "oxo" substituent. It is not necessary to give the aldehyde functional group a location number, however, it is usually necessary to give a location number to the ketone"

2-methyl-3-oxo-butanal

Answer 3

That's if you say have an aldehyde and a ketone in the same molecule.

Answer 4

here!

In diketones both carbonyls require a location number. The ending -dione or -dial is added to the end of the parent chain.

Answer 5

so essentially you would indicate the locations of both ketones and then i believe indicate dial or dione at the end of the parent chain

Answer 6

Yes, so you agree that the compound which I drew is not 1,3-diketone. It should be 2,4-diketone?

Answer 7

yeah, definitely I think this is 2,4 but I would also indicate like 2,4 dione.

Like you want to give them the lowest numbers possible but I don't see how this would be 1,3.

Answer 8

we count the longest carbon chain pentane that becomes the parent name. then we add dione to indicate that there are two ketone groups, then we indicate where they are on what carbons 2 and 4 so alltogether

2,4 penta-dione

Answer 9

Yes....I guess It must be a error in my book. Thanks a bunch c:

Answer 10

one last thing 2,4 pentanedione !

Answer 11

Yeah, that's right. c:

Answer 12

Acetylacetone aka pentane-2,4-dione.

Answer 13

1,3 dicarbonyl refers to both carbonyls as a functional group, the numbering doesnt refer to the numbering of the carbon atoms as it would in the name only in relation to the carbonyl groups. Similarly, a 1,3 dicarbonyl is also called \(\beta \)-diketone. There are also, 1,4 and 1,5- diketones and they're referred to as such because they behave similarly (depending on other substituents) and are useful in cyclization reactions.

here's something short on this https://en.wikipedia.org/wiki/Diketone