PROBLEM 1. Which of the isomeric C4H₁0O alcohols can be prepared by hydrogenation of aldehydes? Which can be prepared by hydrogenation of ketones? Which cannot be prepared by hydrogenation of a carbonyl compound? (Hint: Draw all the isomers of C4H10O alcohols and classify each as primary, secondary, or tertiary. From the classification you wil be able to answer the questions.)
Classes Of Functional Groups
Organic Chemistry deals mostly with carbon and hydrogens, also called hydrocarbons, but those groups which replace hydrogen and bonds with carbon to give a characteristic nature, unique of their own, to the hydrocarbon they are attached to, are called functional groups. All the compounds belonging to a functional group undergo reactions in a similar pattern and are known to have similar physical and chemical properties.
Characteristics Of Functional Groups
In organic chemistry, we encounter a number of special substituent groups which are attached to the hydrocarbon backbone. These groups impart certain characteristics to the molecule of which it is a part of and thus, become the highlight of that particular molecule.
IUPAC Nomenclature
In Chemistry, IUPAC stands for International Union of Pure and Applied Chemistry which suggested a systematic naming approach for the organic and inorganic compounds, as in the beginning stage of nomenclature one single chemical compound was named in many ways by which lead to confusion. The need for this approach aroused as the number of chemical compounds newly discovered were increasing (approximately 32 million compounds) and the basic concept of nomenclature i.e. the trivial nomenclature and the derived system of nomenclature failed to overcome the challenge. It is an important task to name a chemical compound systematically and unambiguously which reduces lots of confusion about the newly reported compounds.
![PROBLEM 1. Which of the isomeric C₂H₁0O alcohols
can be prepared by hydrogenation of aldehydes?
Which can be prepared by hydrogenation of ketones?
Which cannot be prepared by hydrogenation of a
carbonyl compound? (Hint: Draw all the isomers of
C4H10O alcohols and classify each as primary,
secondary, or tertiary. From the classification you will
be able to answer the questions.)
Problem 2. Each of the following alcohols has
been prepared by reaction of a Grignard reagent
with ethylene oxide. Select the appropriate
Grignard reagent in each case.
(a)
CH3
-CH₂CH₂OH
(b)
CH₂CH₂OH
Problem 3. Write equation showing how 3-
Methyl-1,5-pentanediol could be prepared from
a dicarboxylic acid.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3d33457d-b0fc-4a45-9c07-6e8f9168011a%2F7a0577a9-8810-45b8-96d2-be0bb1f3dbee%2F5lb0k47_processed.png&w=3840&q=75)
![Problem 4. Write the structure of the ester
formed in each of the following reactions:
CHỊCH, CON
i
(a) CH₂CH₂CH₂CH₂OH + CH₂CH₂COH H₂SO4
heat
HOLLOH
Hoi
(b) 2CH3OH + HOC
-ČOH
H₂SO4
heat
Problem 5. Predict the principal organic product
of each of the following reactions:
K₂Cr₂O7
(a) CICH₂CH₂CH₂CH₂OH H₂SO4, H₂O
Na₂Cr₂O7
(b) CH,CHCH,CH,CH,CH,CH,CH3 H,SO%,H,O
H₂SO4, H₂O
ОН
(c)
CH3CH₂CH₂CH₂CH₂CH₂CH₂OH
PCC
CH₂Cl₂](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F3d33457d-b0fc-4a45-9c07-6e8f9168011a%2F7a0577a9-8810-45b8-96d2-be0bb1f3dbee%2F7qc8zop_processed.png&w=3840&q=75)
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