Organic Chemistry Answers

Explain production chemistry of apple and banana flavour?

Why chemistry flavour is important for food chemist?

Show how you would prepare cyclohexane from each compound.
(a) cyclohexanol
(b) cyclohexyl bromide
(c) cyclohexane (not by dehydrogenation)

Predict the major products of acid-catalyzed dehydration of the following alcohols.
(a) butan-2-ol
(b) 1-methylcyclohexanol
(c) 2-methylcyclopentanol
(d) 2-methylpropan-1-ol

What halides would undergo E2 dehydrohalogenation to give the following pure alkenes?
(a) hept-1-ene
(b) hex-2-ene
(c) hept-3-ene
(d) methylenecyclopentane
(e) 3-methylcyclobutene

Draw a structure for each compound (includes old and new names)
(a) 3-methylhex-1-ene
(b) trans-3-methyl-3-hexene
(c) 3,4-dichlorobut-1-ene
(d) 1,3-cyclopentadiene
(e) cyclohepta-1,4-diene
(f) vinylcyclobutane
(g) (E)-2-bromo-2-hexane
(h) (Z)-3-methyl-2-nonene
(i) (4E,6E)-1,4,6-octatriene

Predict the products formed by sodium hydroxide-promoted dehydrohalogenation of the following compounds. In each case, predict which will be the major product.
(a) 1-bromobutane
(b) 2-chlorobutane
(c) 3-bromopentane
(d) cis-1-bromo-2-methylcyclohexane
(e) trans-1-bromo-2methylcyclohexane

Show that the (S,S) enantiomer of this (R,R) diastereomer of 1-bromo-1,2-diphenylpropane also undergoes E2 elimination to give the cis diastereomer of the product. (We do not expect these achiral reagents to distinguish between enantiomers.)

Under second-order conditions (strong base/nucleophile), SN2 and E2 reactions may occur simultaneously and compete with each other. Show what products might be expected from the reaction of 2-bromo-3-methylbutane (a moderately hindered 2。 alkyl halide) with sodium ethoxide.

The following names are all incorrect. Draw the structure represented by the incorrect name (or a consistent structure if the name is ambiguous), and give your drawing the correct name.
(a) Cis-dimethylpent-2-ene
(b) 3-vinylhex-4-ene
(c) 2-methylcyclopentene
(d) 6-chlorocyclohexadiene
(e) 2,5-dimethylcyclohexene
(f) Cis-2,5-dibromo-3-ethylpent-2-ene