Alkyl groups are named by replacing the-ane suffix of the alkane name with-yl E.g CH3CH3 Ethane CH3CH2- Ethyl group CH;CH2CH3Propane CH:CH2CH2- Propyl group Common branched alkyl groups have trivial names: CH3 CH3 CH3 CHgCH2-CH2CH2>HgC-CH-CH2-CHgCH2-CH HgC-C butyl isobutyl sec-butyl CH3 tert-butyl t-butyl The names sec and tert are short for secondary and tertiary,referring to the degree of alkyl substitution. H R-C-R-C- R-C H H R Primary Secondary Tertiary 1°carbon2°carbon3°carbon Prefixes are used when there are more than one type of alkyl substituent Di=2 Tri=3 Tetra=4 Penta =5 The prefixes do not count when alphabetizing. Ch03 Alkanes (landscape) Page 5 Ch03 Alkanes (landscape) Page 5 Alkyl groups are named by replacing the –ane suffix of the alkane name with –yl. E.g. CH3CH3 Ethane CH3CH2- Ethyl group CH3CH2CH3 Propane CH3CH2CH2- Propyl group Common branched alkyl groups have trivial names: The names sec and tert are short for secondary and tertiary, referring to the degree of alkyl substitution. Prefixes are used when there are more than one type of alkyl substituent Di = 2 Tri = 3 Tetra = 4 Penta = 5 The prefixes do not count when alphabetizing. R C H H R C R H R C R R Primary 1 o carbon Secondary 2 o carbon Tertiary 3 o carbon