Question

How is the point group of propyne is c3v

Answer 1

Compounds in the Td point group have three planes of symmetry that contain the C2 axes. ... For example, at a very short time scale, 1-propyne (HC≡CCH3) is in the C3v point group, but at longer time scales, rapid rotation about the C–CH3 bond puts it in the C∞v point group