How do you name esters like ethyl propanoate in organic chemistry?

Question

Dr. Sana Mirza · Accepted Answer

Ah, naming esters! This is a classic topic in organic chemistry, and it's all about understanding which part comes from the alcohol and which from the carboxylic acid. Don't worry, it's quite straightforward once you get the hang of it.

Let's break down "ethyl propanoate":

1.  **Identify the two parts:** Esters have two main parts to their name: an "alkyl" part and an "alkanoate" part.
    *   The **alkyl part** comes from the alcohol that reacted to form the ester. This is the first word in the ester's name.
    *   The **alkanoate part** comes from the carboxylic acid. This is the second word, ending in "-oate".

2.  **"Ethyl"**: This tells us the alcohol part. "Ethyl" means there are two carbon atoms in this chain. So, it came from ethanol (CH₃CH₂OH).

3.  **"Propanoate"**: This tells us the carboxylic acid part. "Propanoate" comes from propanoic acid. "Prop-" indicates three carbon atoms. So, it came from propanoic acid (CH₃CH₂COOH).

Therefore, ethyl propanoate is the ester formed from **ethanol** and **propanoic acid**. Its chemical formula is C₂H₅COOC₂H₅ or C₅H₁₀O₂.

So, among the options you have, the one that represents an ethyl group (2 carbons) attached to a propanoate group (3 carbons, including the carbonyl carbon) will be ethyl propanoate.

Kya yeh wala part samajh aaya?

Sources:
- [scribd.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQEoJjuqsD5IUVB0kdbqXb_PdJYu3iWIQH2OptD7ROYbx1LpLfu_L70Xc2sxI2frQiZiecbL0r9zE2YZ6C_KjvtxNd2D8fR_4cHO8GyolcP61x2xJ8E303cHyT3Y8g2zNqzsAll-r4kb0QnBl3qTgvQ1xNQ3uik=)
- [chemistrysteps.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQG86oAUzx1y-aC9SVI7KHF07SJlXzNezMSn9-F62AyHnhPfXi_S6GmkhKBnp8BVvRF6p1zvH9nrOv4b0D9af0jyJ-pn2nq6hfTJweb6FhHFUMuAotInYK48rbWtAGy6Wp1Mu0B7IEGX0Q==)
- [ausetute.com.au](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQHxwF4VQFrxqy9DQqd5GhQtvNAG4nroYo-eMMTbZodDjjO4FDWN-F-oT7TvESzWJafJRjMXSiu0EgepE4MzXtfUx9VqkdLS4W1MBwZhn2hY832dYw1yqHUHHm5rTBzL2Pt8eaq9)
- [guidechem.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFTAaRT_CWpP1QN0NnKwcNHKWYCWnJ5zLaUNmZNgt68nBCi-RWsjYM2r3WVtAyFOFUFptiaHHNNPSUJKkyIW823TQHpmfE2kQb4AbtjFjuWaVri-wAiw7Zi-BRoSj53zoDY6rChCFEeR5OL_ysAUOUXphlhcstw3UTIqkgHvliJvTKNcfecGH2nuusQqDncrxzoQnxS9aR2)
- [ymdb.ca](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFi05gpdXezvENqiJY4ies-DR6uZIFDgFqYsUM_DSKRM_CvS9RrU4-lw6imkTdXadiRYhWAFuiOjLUuiU0E2n66Ihbp4uKN5qvwnqcjCE1bZQnX3-bGFZgA4A48JVUOvUrJSg==)
- [nist.gov](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQGkc-Gn7nmaBSvfjcFV_cfbwyhN-I4toB0jATPDchtSQLf3H0or5Xf0RidnS1AnB8UaCCztCv7TF_rMXtSWrcuY7hbZdVuNeLlHS4lnT92ukZltUcWveu5lvHhy8d6jYwqxC_9BO4a8sw9aeyRpW_pdJBrBcw==)
- [atamanchemicals.com](https://vertexaisearch.cloud.google.com/grounding-api-redirect/AUZIYQFQjwZQBIDVWLm523n0gBbOM3OoAkKq5d2DHjeNGmqWtWfRLCJZM50aoKwKKp2FqQQ7CdVCzErdpIWN9GK3ldyupxReqYT8TFjf_Uxh6hr9BJwl2E6eAiZRj1FfLon_r25-Gd8xCLv7DeCsA6KRjv-dWSFb)