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- A hydrocarbon of unknown structure has the formula C8H10. On catalytic hydrogenation over the Lindlar catalyst, 1 equivalent of Η2 is absorbed. On hydrogenation overa palladium catalyst, 3 equivalents of Η2 are absorbed. (a) How many degrees of unsaturation are present in the unknown structure? (b) How many triple bonds are Present? (c) How many double bonds are present? (d) How many rings are present? (e) Draw a structure that fits the data.Draw the reaction mechanism that shows BH3 adding to the alkene. Why is the product anti-Markovnikov?Which product is more polar the intermediate or the final product? What will happen with the product spots if we use only hexdane? What will happen with the product spots if we use acetone?
- 44. Sterically hindered bases produce what is the major product? Zaitsev product Hoffman product Markovnikov product Anti-Markovnikov productWhich factor will promote an Sn1 reaction?1. Strong base 2. nonpolar aprotic solvent 3. 1 degree substrate 4. good leaving groupDrawing the Oxidative Cleavage Products from an Alkene Draw the products when each alkene is treated with O3 followed by CH3SCH3.
- (36) What pairs of Starting Materials result in the given Robinson Annulation product?What is the reagent R1 in this reaction sequence?45. A small, unhindered base:; bulky, hindered base: Hoffman product; Zaitsev product Zaitsev product; Zaitsev product Hoffman product; Hoffman product Zaitsev product; Hoffman product
