- Q1 A A Rank The Following Dienes In Order Of Decreasing Reactivity With A Dienophile In A Diels Alder Reaction Give Re 1 (27.97 KiB) Viewed 23 times
- Q1 A A Rank The Following Dienes In Order Of Decreasing Reactivity With A Dienophile In A Diels Alder Reaction Give Re 2 (31.79 KiB) Viewed 23 times
- Q1 A A Rank The Following Dienes In Order Of Decreasing Reactivity With A Dienophile In A Diels Alder Reaction Give Re 3 (28.25 KiB) Viewed 23 times
- Q1 A A Rank The Following Dienes In Order Of Decreasing Reactivity With A Dienophile In A Diels Alder Reaction Give Re 4 (25.4 KiB) Viewed 23 times
- Q1 A A Rank The Following Dienes In Order Of Decreasing Reactivity With A Dienophile In A Diels Alder Reaction Give Re 5 (29.91 KiB) Viewed 23 times
Q2 А Cyclohexanone reacts with ethane-1, 2-diol in the presence of dry HCL to form an acetal product with the molecular formula C.H.O. HO OH (1) Give the structure of the product. (2) Explain the role of the HCL (3) Give the mechanism of the reaction. B ble Predict the reactant (X) needed to create the following acetal compound: 10 marks The following structure can undergo two different intermolecular hemiacetalformations. Draw the sam HO OH 20 marks
Q3 A) 1) What type of compound is represented by the following IRs? (Give a reason for your answer) A H B aliple 10 marks B) 1) Which of hydrogens a-d in the following molecule gives a triplet signal in a normal 1H NMR spectrum? (Give a reason for your answer) a O=O O0 CH, -C-CH2CH(OCH3)2 b c d a 15 marks
Predict the structure of a compounds which fits the following NMRS: 1) CHO 12H 2H Sample PPM 11) CHO 3H 4H IH - 5 PPM 25 marks
Q4 A) Describe the mechanism of Fisher esterification (acid-catalysed esterification). Include all proton transfer steps 20 marks B) For each of the following esters suggest and draw the structure of the precursor alcohol and carboxylic acid: 1) 11) Sample 10 marks C) 20 marks