Experimental frequency (cm⁻¹)^d

∆ frequencies

Calculated from Equation (3) (B = 20.56 cm⁻¹)

Calculated from Equation (7)

Calculated from Equation (8)

41.08

41.12

48.65

38.27

82.19

41.11

82.24

87.40

74.90

123.15

40.96

123.36

126.15

119.90

164.01

40.85

164.48

164.90

164.90

204.62

40.62

205.6

203.65

208.51

244.93

40.31

246.72

242.40

250.72

285.01

40.08

287.84

281.15

291.19

324.65

39.64

328.96

319.90

330.26

363.93

39.28

370.08

358.65

367.93

402.82

38.89

411.2

397.40

404.21

441.13

38.31

452.32

436.15

439.80

478.94

37.81

493.44

474.90

474.33

516.20

37.26

534.56

513.65

507.82