What is an Ethyl Group?
Answer – An ethyl group is an alkyl group with the formula C 2 H 5 , or CH 3 – CH 2 .
Explanation:
Alkanes are organic compounds that have an open chain structure and single bonds throughout. They are denoted by the formula C n H 2 n + 2 , where n is an integer.
The removal of one hydrogen atom from an alkane leads to the formation of an alkyl group with the formula C n H 2 n + 1 . Much like their parent alkanes, alkyl groups are composed of only carbon and hydrogen atoms. They are sometimes denoted by R (which could also represent aryl and alkenyl groups) and impact the reactivity of molecules by functioning as electron donating groups.
Ethane is an example of an alkane; its formula is C 2 H 6 . When ethane loses a hydrogen atom, its corresponding alkyl group called an ethyl group is formed. It is often abbreviated as Et.
CH 3 – CH 3 – H → CH 3 – CH 2 –
(Ethane) (Ethyl)
The structure of an ethyl group is as follows:
Since carbon is tetravalent, the site of the lost hydrogen atom has one free valence electron that can bind to other atoms or groups, making the ethyl group reactive.
Example:
An ethyl group can combine with a carboxyl group to form propanoic acid.
CH 3 – CH 2 – + – COOH → CH 3 – CH 2 – COOH
(Ethyl group) (Carboxyl group) (Propionic acid)
Below is the structure for propionic acid:
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