C
4
H - Butadiynl Radical
Molecular constants for the C
4
H radical
Parameter
Ground State
Ref.
υ
=1 State
Ref.
B
[MHz]
4758.6557(7)
83053
4782.160(2)
87018
D
[kHz]
0.8627(10)
0.910(2)
γ
[MHz]
-38.555(2)
-56.97(13)
γ
D
[MHz]
0.127
1.40(9)
b
[MHz]
-19.088(6)
c
[MHz]
12.435(10)