Details

Autor(en) / Beteiligte

• Fisher, E.R.
• Elkind, J.L.
• Clemmer, D.E.
• Georgiadis, R.
• Loh, S.K.
• Aristov, N.
• Sunderlin, L.S.
• Armentrout, P.B.

Titel

Reactions of fourth-period metal ions (Ca sup + endash Zn sup + ) with O sub 2 : Metal-oxide ion bond energies

Ist Teil von

• The Journal of chemical physics, 1990-08, Vol.93:4

Ort / Verlag

United States

Erscheinungsjahr

1990

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Reactions of Ca{sup +}, Zn{sup +} and all first-row atomic transition metal ions with O{sub 2} are studied using guided ion beam techniques. While reactions of the ground states of Sc{sup +}, Ti{sup +}, and V{sup +} are exothermic, the remaining metal ions react with O{sub 2} in endothermic processes. Analyses of these endothermic reactions provide new determinations of the M{sup +}--O bond energies for these eight elements. Source conditions are varied such that the contributions of excited states of the metal ions can be explicitly considered for Mn{sup +}, Co{sup +}, Ni{sup +}, and Cu{sup +}. Results (in eV) at 0 K are {ital D}{sup 0}(Ca{sup +}--O)=3.57{plus minus}0.05, {ital D}{sup 0}(Cr{sup +}--O)=3.72{plus minus}0.12, {ital D}{sup 0}(Mn{sup +}--O)=2.95{plus minus}0.13, {ital D}{sup 0}(Fe{sup +}--O)=3.53{plus minus}0.06 (reported previously), {ital D}{sup 0}(Co{sup +}--O)=3.32{plus minus}0.06, {ital D}{sup 0}(Ni{sup +}--O)=2.74{plus minus}0.07, {ital D}{sup 0}(Cu{sup +}--O)=1.62{plus minus}0.15, and {ital D}{sup 0}(Zn{sup +}--O)=1.65{plus minus}0.12. These values along with literature data for neutral metal oxide bond energies and ionization energies are critically evaluated. Periodic trends in the ionic metal oxide bond energies are compared with those of the neutral metal oxides and those of other related molecules.