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- 1-methylcyclohexene is reacted with the following reactants. Write products. Write which stereochemistry is valid (syn/anti, racemization, antimarkovnikof, etc). 1- Br2/ H2O 2- CH2N2/heatElimination occurs when (Z)-3-bromohex-3-ene is treated with NaNH2. Under the same conditions, 1-bromocyclohexeneundergoes elimination much more sluggishly. Explain whyProvide a reasonable arrow-pushing mechanism for Reaction 5b, and explain the the stereochemical outcome. 5d below
- Which statement best describes the stereochemistry of the product?Please identify priorities of functional groups and name following molecules based on thier stereochemistry as R or Sa) What product is formed from the [1,7] sigmatropic rearrangement of a deuterium in the following triene? (b) Does this reaction proceed in a suprafacial or antarafacial manner under thermal conditions? (c) Does this reaction proceed in a suprafacial or antarafacial manner under photochemical conditions?
- M 6 write the principal product in a, c & e and the neccesary reactives for b, d & f in the following reactions :Give to all parts? (a) Give the complete mechanism for the reaction of trans-2-butene with Br2 in excess H2O. (b) Name the products (including stereochemistry). (c) Give the complete mechanism for the reaction of trans-2-butene with Br2 in excess H2O. (d) Name the products (including stereochemistry).What is the product (A, B, C, or D) of the reaction shown in Image30? a. C b.D c. B d. A
- Explain the Carbocation Rearrangements ?Determine the major product(s) of the following reaction (disregard stereochemistry): Pentan-3-one reacts with LDA first, then this intermediate reacts with 1-bromo-2-methylpropane Propan-2-one reacts with 1) LDA, then with 2) another propan-2-one followed by 3) hydronium ionWhen Br2 is added to buta-1,3-diene at -15 °C, the product mixture contains 60% ofproduct A and 40% of product B. When the same reaction takes place at 60 °C, theproduct ratio is 10% A and 90% B.(a) Propose structures for products A and B. (Hint: In many cases, an allylic carbocationis more stable than a bromonium ion.)
