What is the name for an alkyl group that contains two carbon atoms? Organic Chemistry Nomenclature Naming Functional Groups 1 Answer anor277 Dec 14, 2015 #H_3C-CH_2# is known as the ethyl group. Explanation: #H_3C-CH_2# is a common substituent. The abbreviation #Et# is also quite an acceptable representation (especially on Socratic where if you textify CC you get #CC#! Answer link Related questions What are the steps used to name an ester? What do the functional groups determine? How can I draw the following aldehydes and ketones: hexanal, heptan-3-one, 3-methyloctanal? How can I draw the following carboxylic acids: butanoic acid, 2-methylpentanoic acid,... How can I draw the following ethers: 1-propoxypentane, 2-ethoxybutane, 1-methoxy-4-chlorohexane,... How can I draw the following esters: ethyl butanoate, pentyl propanoate, propyl 3-ethylhexanoate? How can I draw the following amides: N-ethylbutanamide, N-propylpentanamide, N,3-dimethylhexanamide? Why do amines generally have lower boiling points than alcohols of comparable molar mass? Why are secondary and tertiary amines less soluble than primary amines of similar molecular size? In some cuisines, fish recipes include lemon garnish or a vinegar sauce such as sweet and sour... See all questions in Naming Functional Groups Impact of this question 4870 views around the world You can reuse this answer Creative Commons License