用系统命名法命名下列物质,
1 CH3-CH-CH2-CH-CH-CH2-CH2-CH3
∣ ∣ ∣
C2H5 C2H5 CH3
2 CH3-CH-CH2-CH2-CH-CH-CH3
∣ ∣ ∣
CH3 C2H5 C2H5
CH3 C2H5
3 ∣ ∣
CH3-CH-CH2-CH-CH
∣ ∣
C2H5 CH(CH3)2
4 CH3CH-CH2CH3
∣
C2H5
C2H5
5 ∣
CH3-CH-CH2-CH-CH-CH3
∣ ∣
CH3 CH2-CH3
C2H5
6 ∣
CH3-CH-C-CH2-CH3
∣ ∣
CH3 CH3