Presentation of Results
A. Use your infrared data, and also the n.m.r. data supplied, to deduce the formula of the final product. B. Summarise the principal spectroscopic evidence for your conclusion. C. Write down the reaction sequence and discuss it in terms of the 18-electron rule. How might the mechanism of the final step be investigated ? D. Produce written answers to the questions below: (1) What do CO and Ph3P have in common as ligands ? (2) In ketones the C-O stretching frequency lies in the range 1700-1750 cm-1. Why do you think the equivalent C-O strecyh in the Ph3P adduct prepared in the above experiment occurs at a much lower frequency ? (3) Why is the compound [Fe( (4) The methyl complex Fe( (5) THere are known mono or binuclear compounds with the general formula Mx( (6) Write out a plausible mechanism for the formation of a propanal from ethene, hydrogen and carbon monoxide, suing CoCl2 as catalyst. This is the hydroformylation process. (7) Predict the structures (?) of the following reactions: (a) CO + Mn(CO)5CH3 --Change in pressure-> ? (b) CH3COCl + Na[Mn(CO)5] --THF-> ? + NaCl ? + NaCl --80° in vacuo-> ?1 + ?2 |
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