The effect of the rotation of the methyl group on the rotational constants A, B, and C of the CH3 CN molecule

الملخص EN

the effect of the relastion of the methyl group through a polar angle from 0 to 360 onthe rotational constants, A, B, and C of the ch3cn molecule, over the range of bending angle, (a + b), from 0 to 50.

the variations in these constants for the v8 = 1, 2, and 3 virational states wer found to be negligible, therefore the three hydrogen atoms of the methyl group can be considered as a point mass of 3mh in calculating the moment of intertie tensors Ixx ' Iyy and Izz.