09 05 86

ELECTRONEGATIVITY

Electronegativity is a parameter originally introduced by Pauling

which describes, on a relative basis, the tendency of an atom in

a molecule to attract bonding electrons. While electronegativity

is not a precisely defined molecular property, the electronegativ-

ity difference between two atoms provides a useful measure of

the polarity and ionic character of the bond between them. This

table gives the electronegativity X, on the Pauling scale, for the

most common oxidation state. Other scales are described in the

references.

References

1. Pauling, L., The Nature of the Chemical Bond, Third Edition, Cornell

University Press, Ithaca, NY, 1960.

2. Allen, L. C., J. Am. Chem. Soc., 111, 9003, 1989.

3. Allred, A. L., J. Inorg. Nucl. Chem., 17, 215, 1961.

Symbol

2.20

—

0.98

1.57

2.04

2.55

3.04

3.44

3.98

—

0.93

1.31

1.61

1.90

2.19

2.58

3.16

—

0.82

1.00

1.36

1.54

1.63

1.66

1.55

1.83

1.88

1.91

1.90

1.65

1.81

2.01

Symbol

2.18

2.55

2.96

—

0.82

0.95

1.22

1.33

1.6

2.16

2.10

2.2

2.28

2.20

1.93

1.69

1.78

1.96

2.05

2.1

2.66

2.60

0.79

0.89

1.10

1.12

1.13

1.14

—

1.17

—

1.20

Symbol

—

1.22

1.23

1.24

1.25

—

1.0

1.3

1.5

1.7

1.9

2.2

2.4

1.9

1.8

1.9

2.0

2.2

—

0.7

0.9

1.1

1.3

1.5

1.7

1.3

9-77

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