State

Parametrers

ScO^b

ScS^a

ScSe^a

ScTe^a

Trend

Electronegativity of the chalcogenides

3.44

2.58

2.55

2.1

Difference in Electronegativity

2.08

1.22

1.19

0.74

X²Σ⁺

T_e (cm⁻¹)

0.0 (GS)

0.0 (GS)

0.0 (GS)

0.0 (GS)

Same GS^*

R_e (Ǻ)

1.701

2.181

2.379

2.562

ω_e (cm⁻¹)

1010

540.6

348.7

301.9

B_e × 10² (cm⁻¹)

49.39

18.93

10.39

7.73

(1)²Δ

T_e (cm⁻¹)

15,731.3 (1^st ES)

8760 (1^st ES)

8322 (1^st ES)

9039 (8^th ES)

Exception

R_e (Ǻ)

1.777

2.229

2.409

2.541

ω_e (cm⁻¹)

886.1

581.6

401.1

361.9

B_e × 10² (cm⁻¹)

45.22

18.13

10.19

7.85

(2)²Σ⁺

T_e (cm⁻¹)

21,071.2 (2^nd ES)

11,604 (5^th ES)

10,437 (5^th ES)

7671 (5^th ES)

R_e (Ǻ)

1.757

2.222

2.399

2.568

ω_e (cm⁻¹)

831.1

557.4

380.5

328.1

B_e × 10² (cm⁻¹)

46.27

18.24

10.21

7.69

(1)⁴Σ⁺

T_e (cm⁻¹)

28,364.8 (6^th ES)

12,828 (7^th ES)

8486 (2^nd ES)

7287 (4^th ES)

R_e (Ǻ)

2.059

2.522

2.695

2.846

ω_e (cm⁻¹)

624.1

350.6

252.8

231.9

B_e × 10² (cm⁻¹)

35.46

14.16

8.11

6.26

(1)⁴Δ

T_e (cm⁻¹)

28,918.2 (7^th ES)

13,581 (8^th ES)

9339 (3^rd ES)

8171 (6^th ES)

R_e (Ǻ)

1.993

2.537

2.713

2.865

ω_e (cm⁻¹)

653.9

344.9

246.5

227.2

B_e × 10² (cm⁻¹)

33.85

13.99

7.99

6.18