How do you do the simplified structural formula and full structural formula of ester? I'm really struggling,please help!

e.g.methyl ethanoate/propyl methanoate

There are many rules of naming esters but simplified structural formula would entail, a condensed structure such as /\o/\ (o is connected to the 2 side chains) and a full structure wouild be if you drew it with all the carbons and hydrogens and etc.

methyl ethanoate
CH3-O-COH

propyl methanoate
(propyl is 3 carbons long)
CH3CH2CH2-O-COH

I would draw methyl ethanoate as

CH3COOCH3, which I think is different than you have drawn. It is made by combining
CH3COOH + HOCH3 ==>http://en.wikipedia.org/wiki/Methyl_acetate
I think the structure drawn actually is methyl methanoate or methyl formate

Propyl methanoate I think is correct with the correct number of atoms, but I think a clearer picture is
HCOOCH2CH2CH3. Made by combining
HCOOH + HOCH2CH2CH3
Also known as propyl formate.
Check my thinking.

To get the simplified structural formula and full structural formula of an ester, such as methyl ethanoate and propyl methanoate, you need to understand the structure and naming conventions of esters.

An ester consists of two parts: the alcohol portion (also known as the "R-O" part) and the acid portion (also known as the "O-C=O" part). The alcohol portion derives from an alcohol, where the -OH group is replaced by an alkyl group. The acid portion derives from a carboxylic acid, where the -OH group is replaced by an alkoxy group (-O-). The alcohol and acid portions are joined together by an oxygen atom.

Let's break down the examples you provided:

1. Methyl Ethanoate:
- Start with the alcohol portion: "methyl." This means the alcohol portion (R-O) contains a methyl group (-CH3).
- Next, look at the acid portion: "ethanoate." This indicates that the acid portion (O-C=O) comes from ethanoic acid (also known as acetic acid). Ethanoic acid has the structure CH3-C(=O)-OH.
- Combine the alcohol and acid portions with an oxygen atom in between: CH3COOCH3.

The full structural formula of methyl ethanoate is CH3COOCH3.

2. Propyl Methanoate:
- Start with the alcohol portion: "propyl." This means the alcohol portion (R-O) contains a propyl group (-C3H7).
- Next, look at the acid portion: "methanoate." This indicates that the acid portion (O-C=O) comes from methanoic acid (also known as formic acid). Methanoic acid has the structure HCOOH.
- Combine the alcohol and acid portions with an oxygen atom in between: HCOO(C3H7).

The full structural formula of propyl methanoate is HCOO(C3H7).

For the simplified structural formula, you can represent the alkyl groups without explicitly showing the carbon and hydrogen atoms. In this case, the simplified structural formula for both methyl ethanoate and propyl methanoate would be written as follows:

Methyl ethanoate: CH3COOCH3
Propyl methanoate: HCOO(C3H7)

Remember to always double-check the names and structures to ensure accuracy. Additionally, it's helpful to practice drawing different esters and verifying their structures using the steps mentioned above.