Line Intensity Measurements of the 𝜈₇+𝜈₈ Band of Ethylene (¹²C₂H₄)

Table 2

Ground state and upper 𝑣₇+𝑣₈=1 state rovibrational constants (cm⁻¹) for the 𝜈₇+𝜈₈ combination band of ¹²C₂H₄ (𝐴-reduction and 𝐼^𝑟 representation).

	Ground state [30]	𝑣7+𝑣8=1 state
A	4.8646201954 (464)^a	4.870611 (24)^a
B	1.0010565039 (119)	0.9895253 (22)
C	0.8280459778 (117)	0.8303283 (11)
Δ𝐽×10^6	1.4702286 (406)	1.3957 (37)
Δ𝐽𝐾×10^4	0.102319954 (3678)	0.2836 (27)
Δ𝐾×10^4	0.86486844 (1953)	1.17094 (85)
𝛿𝐽×10^6	0.2816829 (149)	0.2361 (14)
𝛿𝐾×10^4	0.10161652 (1391)	0.2155 (11)
Φ𝐽×10^9	0.0024347 (503)	[0.0024347]^b
Φ𝐽𝐾×10^9	0.194771 (3364)	0.428 (60)
Φ𝐾𝐽×10^6	−0.00045941 (1185)	−0.4229 (54)
Φ𝐾×10^9	6.24752 (1300)	[6.24752]^b
𝜑𝐽×10^9	0.00112776 (1669)	[0.00112776]^b
𝜑𝐽𝐾×10^9	0.110854 (2077)	[0.110854]^b
𝜑𝐾×10^9	3.7555 (1030)	[3.7555]^b
𝜈0	—	1888.978834 (92)
no. of IR transitions	—	391
rms deviation (cm^−1)	—	0.000653

^aThe uncertainty in the last digits (twice the estimated standard error) is given in parentheses.
^bFixed to ground state value (see column 2).