Classify each reaction as an oxidation, a reduction, or neither.

(a)

(b)

(c)

Classify each reaction as an oxidation, a reduction, or neither.

(d)

(e)

(f)

Classify each reaction as an oxidation, a reduction, or neither.

(g)

(h)

(i)

Classify each reaction as an oxidation, a reduction, or neither.

(j)

(k)

(l)

Predict the products of the reactions of the following compounds with:

1. chromic acid or excess sodium hypochlorite with acetic acid.

2. PCC or NaOCl (1 equivalent) with TEMPO.

a. cyclohexanol

b. 1-methylcyclohexanol

c. cyclopentylmethanol

Predict the products of the reactions of the following compounds with:

1. chromic acid or excess sodium hypochlorite with acetic acid.

2. PCC or NaOCl (1 equivalent) with TEMPO.

d. cyclohexanone

Predict the products of the reactions of the following compounds with:

1. chromic acid or excess sodium hypochlorite with acetic acid.

2. PCC or NaOCl (1 equivalent) with TEMPO.

e. cyclohexane

Predict the products of the reactions of the following compounds with:

1. chromic acid or excess sodium hypochlorite with acetic acid.

2. PCC or NaOCl (1 equivalent) with TEMPO.

f. 1-phenylpropan-1-ol

Predict the products of the reactions of the following compounds with:

1. chromic acid or excess sodium hypochlorite with acetic acid.

2. PCC or NaOCl (1 equivalent) with TEMPO.

g. hexan-1-ol

h. acetaldehyde, CH₃CHO

We have covered several oxidants that use a multi-valent atom (Cr, Cl, S, or I) as their active species, going from a higher oxidation state before the oxidation to a lower oxidation state after oxidizing the alcohol. Draw the Lewis structures of the following atoms, before and after the oxidation of an alcohol to a ketone or aldehyde. How many bonds to oxygen does each atom have before and after the oxidation?

a. the Cr in chromic acid

b. the Cl in sodium hypochlorite

c. the S in the Swern oxidation

Give the structure of the principal product(s) when each of the following alcohols reacts with (1) Na₂Cr₂O₇/H₂SO₄, (2) PCC, (3) DMP, and (4) 1 equiv NaOCl-TEMPO.

a. octan-1-ol

b. octan-3-ol

Give the structure of the principal product(s) when each of the following alcohols reacts with (3) DMP, and (4) 1 equiv NaOCl-TEMPO.

c. 4-hydroxydecanal

Give the structure of the principal product(s) when each of the following alcohols reacts with (1) Na₂Cr₂O₇/H₂SO₄, (2) PCC

c. 4-hydroxydecanal

Give the structure of the principal product(s) when each of the following alcohols reacts with (1) Na₂Cr₂O₇/H₂SO₄, (2) PCC

d. 1-methylcyclohexan-1,4-diol

Predict the products you expect when the following starting material undergoes oxidation with an excess of each of the reagents shown below.

a. chromic acid

b. PCC (pyridinium chlorochromate)

c. sodium hypochlorite/acetic acid

Predict the products you expect when the following starting material undergoes oxidation with an excess of each of the reagents shown below.

d. DMSO and oxalyl chloride

e. DMP (periodinane) reagent

Suggest the most appropriate method for each of the following laboratory syntheses. In each case, suggest both a chromium reagent and a chromium-free reagent.

(a) butan-1-ol → butanal, CH₃CH₂CH₂CHO

(b) but-2-en-1-ol → but-2-enoic acid, CH₃CH=CH–COOH

(c) butan-2-ol → butan-2-one, CH₃COCH₂CH₃

Suggest the most appropriate method for each of the following laboratory syntheses. In each case, suggest both a chromium reagent and a chromium-free reagent.

(d) cyclopentanol → 1-ethylcyclopentanol (two steps)

(e) cyclopentylmethanol → 1-cyclopentylpropan-1-ol (two steps)

Suggest the most appropriate method for each of the following laboratory syntheses. In each case, suggest both a chromium reagent and a chromium-free reagent.

(f) 1-methylcyclohexanol → 2-methylcyclohexanone (several steps)

A chronic alcoholic requires a much larger dose of ethanol as an antidote to methanol poisoning than does a nonalcoholic patient. Suggest a reason why a larger dose of the competitive inhibitor is required for an alcoholic.

Predict the major products of the following reactions.

(a) ethyl tosylate + potassium tert-butoxide

(b) isobutyl tosylate + NaI

(c) (R)-2-hexyl tosylate + NaCN

Predict the major products of the following reactions.

(d) the tosylate of cyclohexylmethanol + excess NH₃

(e) n-butyl tosylate + sodium acetylide, H–C≡C:^{– +}Na

Show how you would convert propan-1-ol to the following compounds using tosylate intermediates. You may use whatever additional reagents are needed.

a. 1-bromopropane

b. propan-1-amine, CH₃CH₂CH₂NH₂

Show how you would convert propan-1-ol to the following compounds using tosylate intermediates. You may use whatever additional reagents are needed.

c. CH₃CH₂CH₂OCH₂CH₃, ethyl proyl ether

d. CH₃CH₂CH₂CN, butyronitrile

Predict the products of the following reactions.

(a) cyclohexylmethanol + TsCl/pyridine

(b) product of (a) + LiAlH4

Predict the products of the following reactions.

(c) 1-methylcyclohexanol + H₂SO₄, heat

(d) product of (c) + H₂, Pt

Propose a mechanism for the reaction of

(a) 1-methylcyclohexanol with HBr to form 1-bromo-1-methylcyclohexane.

The reaction of tert-butyl alcohol with concentrated HCl goes by the S_N1 mechanism. Write a mechanism for this reaction.

Show how you would use a simple chemical test to distinguish between the following pairs of compounds. Tell what you would observe with each compound.

(d) allyl alcohol and propan-1-ol

(e) butan-2-one and tert-butyl alcohol

Neopentyl alcohol, (CH₃)₃CCH₂OH, reacts with concentrated HBr to give 2-bromo-2-methylbutane, a rearranged product. Propose a mechanism for the formation of this product.