Why the existenceof cyclopropyne (C3H2) is impossible?
If you have a normal triple bond, the bond angle between the carbon atom is 180 degrees. Too much bond stress is required to bend the bonds to the 60 degrees required to make a three membered ring. This create much stress in the molecule and makes it unstable.
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/images/cyclprophyne.png)
![](https://s3mn.mnimgs.com/img/shared/content_ck_images/images/cyclprophyne.png)