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8
O
15.9994(3)

Bond enthalpies in gaseous diatomic species

The bond energy in the gaseous diatomic species OO is 498.36 ?.17 kJ mol-1. The following values refer to neutral heterodiatomic molecules in the gas phase. These numbers may well differ considerably from, say, single bond energies in a solid. All values are given in kJ mol-1.

Bond enthalpies in gaseous diatomic species

Group 1 diatomic OX bond enthalpies

View charts... OX bond Enthalpy [/ kJ mol-1]
OH 427.6
OLi 333.5 ?.4
ONa 256.1 ?6.7
OK 277.8 ?0.9
ORb 255 ?4
OCs 295.8 ?2.8
  OFr  

Group 2 diatomic OX bond enthalpies

View charts... OX bond Enthalpy [/ kJ mol-1]
OBe 434.7 ?3.4
OMg 363.2 ?2.6
OCa 402.1 ?6.7
OSr 425.5 ?6.7
OBa 561.9 ?3.4
  ORa  

Group 13 diatomic OX bond enthalpies

View charts...OX bondEnthalpy [/ kJ mol-1]
OB 808.8 ?0.9
OAl 511 ?
OGa 353.5 ?1.8
OIn< 320.1 ?1.8
OTl  

Group 14 diatomic OX bond enthalpies

View charts...OX bondEnthalpy [/ kJ mol-1]
OC 1076.5 ?.4
OSi 799.6 ?3.4
OGe 659.4 ?2.6
OSn 531.8 ?2.6
OPb 382.0 ?2.6

Group 15 diatomic OX bond enthalpies

View charts...OX bondEnthalpy [/ kJ mol-1]
ON 630.57 ?.13
OP 599.1 ?2.6
OAs 481 ?
OSb 434.3 ?0.8
OBi 337.2 ?2.6

Group 16 diatomic OX bond enthalpies

View charts...OX bondEnthalpy [/ kJ mol-1]
OO 498.36 ?.17
OS 521.7 ?.2
OSe 464.8 ?1.3
OTe 376.1 ?0.9
 OPo 

Group 17 diatomic OX bond enthalpies

View charts...OX bondEnthalpy [/ kJ mol-1]
OF 222 ?7
OCl 269.1
OBr 235.1 ?.4
OI 249.0 ?.3
 OFr 

Group 18 diatomic OX bond enthalpies

View charts...OX bondEnthalpy [/ kJ mol-1]
OHe  
 ONe  
OAr  
OKr< 8
OXe 36.4
 ORn  

Notes

I am grateful to Professor J.A. Kerr (University of Birmingham, UK) for the provision of the bond strengths of diatomic molecules data.

The values given here are at 298 K. All values are quoted in kJ mol-1. Generally, these data were obtained by spectroscopic or mass spectrometric means. You should consult reference 1 for further details. A note of caution: the strength of, say, the C-H bond in the gaseous diatomic species CH (not an isolable species) is not necessarily, the same as the strength of a C-H bond in, say, methane.

The strongest bond for a diatomic species is that of carbon monoxide, CO (1076.5 ?0.4 kJ mol-1). The strongest bond for a homonuclear diatomic species is that of dinitrogen, N2 (945.33 ?0.59 kJ mol-1).

References

  1. J.A. Kerr in CRC Handbook of Chemistry and Physics 1999-2000 : A Ready-Reference Book of Chemical and Physical Data (CRC Handbook of Chemistry and Physics, D.R. Lide, (ed.), CRC Press, Boca Raton, Florida, USA, 81st edition, 2000.
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Copyright 1993-2003 Mark Winter [The University of Sheffield and WebElements Ltd, UK]. All rights reserved.
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