4.1 Introduction of alkanes and cycloalkanes General formula chonno for alkanes C3Ha CH3CH2CH3 Propane General formula C,H2n for cycloalkanes( 烷烃) CH n2n Cyclopropane4.1 Introduction of alkanes and cycloalkanes • General formula CnH2n+2 for alkanes • C3H8 CH3CH2CH3 Propane • General formula CnH2n for cycloalkanes (环 烷烃） • CnH2n Cyclopropane