ORGANIC CHEMISTRY Chapter 2 2. 5A Alkyl Group and the symbol r ° Alkyl groups(烷基) are the groups that we identify for purposes of naming compounds o They are groups that would be obtained by removing a hydrogen atom from an alkane oR is used as a general symbol to represent any alkyl group CH CH Me Methyl Ch2CH CH3 CH2- or C2H5 Et Ethyl CH3CH2 CH3 CH3CH, CH2 Propyl CH3 CH2 CH3 CH3 CHCH3 or ( CH3)2CH pr Isopropyl Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 2 2.5A Alkyl Group and the Symbol R Alkyl groups (烷基) are the groups that we identify for purposes of naming compounds. They are groups that would be obtained by removing a hydrogen atom from an alkane R is used as a general symbol to represent any alkyl group. CH4 CH3 Me Methyl CH3CH3 CH3CH2 Et CH3CH2CH3 CH3CH2CH2 CH3CH2CH3 CH3CHCH3 Pr i-Pr C2H5 (CH3)2CH or or Ethyl Propyl Isopropyl