3种
1.环丁烷
H H
| |
H-C-C-H
| |
H-C-C-H
| |
H H
2.1-丁烯
H H H H
| | | |
H-C=C-C-C-H
| |
H H
3.2-丁烯
H H H H
| | | |
H-C-C=C-C-H
| |
H H