Organometallic Chemistry: Electron Counting, Spectroscopy, pKa Values, and Reactivity
Dive into the world of organometallic chemistry with topics such as electron counting, C-O stretching frequencies, pKa values of metal carbonyl hydrides, and reactivity of metal carbonyl complexes. Explore the stability, spectroscopy, acidity, and reactivity of various organometallic species in this comprehensive review.
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Presentation Transcript
Review of Electron Counting Count the electrons and predict the stability of the following organometallic species CO Mn CO COCO CO Mn CH3 CO CO CO OC OC Mn CO CO OC OC OC PPh3 CO V CO CO Cl Re N OC OC CO W CO CO Cl OC PPh3
Spectroscopy of Carbonyl Complexes Predict order of C-O stretching frequencies: [V(CO)6], [V(CO)6]-, [V(CO)6]2- [Fe(CO)5], [Fe(CO)4(PF3)], [Fe(CO)4(PMe3)] (CO)4 Fe C O (OC)3Fe Fe(CO)3 H
pKaValues of Metal Carbonyl Hydrides Predict which compound in each pair will have the higher pKavalue: [CoH(CO)4], [CoH(CO)3(PF3)] [Fe(H)2(CO)4], [FeH(CO)4]- [Fe(H)2(CO)4], [Fe(H)(Cp)(CO)2] [Fe(H)(Cp)(CO)2], [Os(H)(Cp)(CO)2] Hint: consider Hard Soft Acid Base Theory
Reactivity of Metal Carbonyl Complexes Predict which CO in each sequence is most reactive toward electrophilic attack: [V(CO)6], [V(CO)6]-, [V(CO)6]2- [Fe(CO)5], [Fe(CO)4(PF3)], [Fe(CO)4(PMe3)] O C Cp CO OC Cp V V C O CO
