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3.7.2 Bond lengths and dissociation enthalpies of diatomic molecules

The tabulated values are for the internuclear separation re in the absence of vibration; those marked * are for the vibrational ground state. They are taken from the compilations: Tables of Interatomic Distances and Configuration of Molecules and Ions, Special Publication No 11; Supplement 1956–1959, Special Publication No 18, Chemical Society, London, 1958, 1965. Bond-dissociation enthalpies D are taken from A. G. Gaydon, Dissociation Energies and Spectra of Diatomic Molecules, 3rd edn, 1968 (Chapman & Hall, London).




Bond

re/pm

D/(kJ · mol−1)

Bond   

re/pm

D/(kJ · mol−1)

H—H

       74.130

432.00

C—H

112.0

  335

H—D

       74.140

435.39

N—H

103.8

  310

D—D

       74.143

439.53

P—H

  143.3*

  340

C—C

     131.2

603      

O—H

  97.1

  425

N—N

     109.76

942      

F—H

  91.7

  564

P—P

     189.3

485      

Cl—H

127.5

  428

O—O

     120.741

493.6      

Br—H

140.8

  362

S—S

     188.7

423      

I—H

160.0

  295

F—F

     141.8*

155      

C—N

117.7

  745

Cl—Cl

     198.8

239      

C—O

113.1

1069

 

Br—Br

     228.4

190      

N—O

  115.02

  627

 

I—I

     266.7

147      

Cl—F

162.8

  247

   

 

 

    

 

 



M.L.McGlashan

 

 

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