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Accurate Measurements of Bond Dissociation Energies

Finally, we have used the fact that the diatomic open d-subshell transition metal molecules have extremely large numbers of low energy electronic states to determine bond energies to high accuracy by the observation of a sharp predissociation threshold in a congested vibronic spectrum. This has provided the following bond energies:

Nickel Group Dimers    Transition Metal Cations: 
Ni2  2.042(2) eV   Ti2+  2.435(2) eV
NiPt  2.798(3) eV   V2+  3.140(2) eV
Pt2  3.14(2) eV   Co2+  2.765(1) eV
      Co3+  2.086(2) eV
Early-Late Intermetallics:    V3+  2.323(1) eV
TiCo  2.401(1) eV   TiO+-Mn  1.763(1) eV
VNi  2.100(1) eV      
YCo  2.591(1) eV   Other Metal Dimers and Trimers: 
YNi  2.904(1) eV   Rh2  2.4059(5) eV
ZrCo  3.137(1) eV   Al3  2.701(5) eV
ZrNi  2.861(1) eV      
NbCo  2.729(1) eV   Transition Metal – Main Group Bonds:
NbNi  2.780(1) eV   Carbides:  
      TiC 3.857(4) eV
Transition Metal Aluminides:    ZrC 4.892(10) eV
AlV  1.489(10) eV   HfC 4.426(3) eV
AlCr  2.272(9) eV   ThC 5.060(3) eV
AlCo  1.844(2) eV   VC 4.109(3) eV
AlNi  2.29(5) eV   NbC 5.620(4) eV
      TaC 4.975(3) eV
Multiply-Bonded Diatomic Metals:    WC 5.289(8) eV
TiV  2.068(1) eV   FeC 3.961(19) eV
TiNb  3.092(1) eV   NiC 4.167(3) eV
V2  2.753(1) eV    Nitrides:  
VZr  2.663(3) eV    VN  4.997(2) eV
TiZr  2.183(1) eV    Silicides:  
NbCr  3.0263(6) eV    TiSi  2.201(3) eV
Zr2  3.052(1) eV    ZrSi 2.950(3) eV 
CrW 2.867(1) eV   HfSi 2.871(3) eV
      VSi 2.234(3) eV
      NbSi 3.080(3) eV
      TaSi 2.999(3) eV
      WSi 3.103(3) eV
      FeSi 2.402(3) eV
      RuSi 4.132(3) eV
      OsSi 4.516(3) eV
      CoSi 2.862(3) eV
      RhSi 4.169(3) eV
      IrSi 4.952(3) eV
      NiSi 3.324(3) eV
      PtSi 5.325(9) eV
      Sulfides:  
      VS 4.535(3) eV
      WS 4.935(3) eV
      FeS 3.240(3) eV
      NiS 3.651(3) eV
      Selenides:  
      TiSe 3.998(6) eV
      ZrSe 4.902(3) eV
      HfSe 5.154(4) eV
      VSe 3.884(3) eV
      NbSe 4.834(3) eV
      TaSe 4.705(3) eV
      FeSe 2.739(6) eV
      NiSe 3.218(3) eV
      Chlorides:  
      WCl 3.818(6) eV

 

We have made many more contributions than those listed here, often providing a qualitative understanding of the bonding in a transition metal-containing species. This is just too much to summarize in a short paper like this.

Last Updated: 6/7/19