Oxidation of Aldehydes and Ketones
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Questions and Answers

What is the molecular formula of benzene?

C6H6

What is unique about the carbon-carbon bonds in the benzene molecule?

They have the same lengths, somewhere between single and double bonds.

What does the circle in Structure III represent?

Delocalization of the 6 p-electrons around the aromatic ring.

How are substituent groups denoted in IUPAC nomenclature?

<p>As a prefix to the name of the aromatic compound.</p> Signup and view all the answers

What was Ethyl Ether used for in the 1800's?

<p>as one of the first anesthetics used for surgical procedures</p> Signup and view all the answers

How are multiple similar substituent groups denoted?

<p>With Greek numerical prefixes such as di, tri, tetra.</p> Signup and view all the answers

What is the role of Methyl t-butyl ether (MTBE) in gasoline?

<p>it increases octane concentration and reduces pollutants</p> Signup and view all the answers

What is the origin of esters?

<p>derivative of carboxylic acids (COOH) and the hydroxyl (OH) group</p> Signup and view all the answers

What is the name of a benzene ring with a one-nitro group attached?

<p>Nitrobenzene.</p> Signup and view all the answers

What are esters commonly used for?

<p>food aroma and fragrance</p> Signup and view all the answers

What is the chemical name of Codeine?

<p>Methoxymethane</p> Signup and view all the answers

What is Ethoxyethane or diethyl ether used as in industrial applications?

<p>a starter fluid for diesel engines and cold weather</p> Signup and view all the answers

What is the main difference in the oxidation reaction between aldehydes and ketones?

<p>The hydrogen atom attached to the carbonyl carbon in aldehydes is abstracted during oxidation, whereas in ketones, carbon-carbon bonds are broken on either side of the carbonyl group.</p> Signup and view all the answers

What is the product of the reduction of aldehydes to alcohols?

<p>Primary alcohols</p> Signup and view all the answers

What are the two general methods to reduce aldehydes and ketones to hydrocarbons?

<p>The Wolff-Kishner reduction and the Clemmensen reduction</p> Signup and view all the answers

What is the result of the haloform reaction between compounds containing the methyl carbonyl group and halogens in the presence of dilute alkali?

<p>The formation of haloforms, namely, chloroform, bromoform, and iodoform</p> Signup and view all the answers

What is the difference in the reduction of aldehydes and ketones to alkanes?

<p>Aldehydes are reduced to methyl (CH3–), while ketones are reduced to methylene (CH2–)</p> Signup and view all the answers

What is the purpose of catalytic hydrogenation or chemical reducing agents like LiAlH4 in the reduction of aldehydes and ketones?

<p>To reduce aldehydes to primary alcohols and ketones to secondary alcohols</p> Signup and view all the answers

What is the functional group of carboxylic acid?

<p>Carboxyl</p> Signup and view all the answers

What is the suffix name of carboxylic acid?

<p>-oic acid</p> Signup and view all the answers

Why do many carboxylic acids have common names that reflect their historical origin?

<p>Because they were derived from natural sources</p> Signup and view all the answers

What is the general formula for long-chain normal aliphatic acids?

<p>CH3(CH2)nCOOH (n = 12 to 20)</p> Signup and view all the answers

How are systematic names for carboxylic acids derived?

<p>By counting the number of carbons in the longest continuous chain that includes the carboxyl group and replacing the –e ending of the corresponding alkane by –oic acid</p> Signup and view all the answers

Why are the long-chain normal aliphatic acids called 'fatty acids'?

<p>Because they occur as esters in fats and oils</p> Signup and view all the answers

Why does benzene resist addition reactions?

<p>Benzene resists addition reactions because those reactions would involve breaking the delocalization and losing that stability.</p> Signup and view all the answers

What are polyromantic hydrocarbons lipophilic and?

<p>Nonpolar.</p> Signup and view all the answers

What is a common source of aromatic compounds?

<p>Petroleum and coal.</p> Signup and view all the answers

What is a major health risk associated with exposure to PAHs?

<p>Carcinogenic effect to humans.</p> Signup and view all the answers

What is one industrial use of benzene?

<p>As a solvent.</p> Signup and view all the answers

What is a cosmetic ingredient derived from benzene?

<p>Benzyl alcohol.</p> Signup and view all the answers

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