Question 1

Suggest a mechanism by which ψ-ionone is transformed into β-ionone on treatment with acid.

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Question 2

A compound "Z" (C₁₀H₁₆),has $\lambda$_max at 184 nm in its UV spectrum.Catalytic hydrogenation of Z affords a mixture of diasteromers,which upon separation are identified to be cis-1-isopropyl-4-methylcyclohexane and trans-1-isopropyl-4-methylcyclohexane.Upon ozonolysis,Z yields formaldehyde and 3-acetyl-6-oxoheptanal.Suggest a structure for Z that is consistent with all of the above data,clearly explaining your rationale.

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Question 3

What products would be obtained from the ozonolysis of zingiberine,found in the oil of ginger?

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Question 4

When natural rubber is heated with sulfur,a reaction takes place that produces _____________ between the polymer chains.This process is known as _____________.

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Question 5

Fats can be either optically active or inactive,depending on their structure.Draw the structure of an optically active fat that yields 2 equiv of stearic acid and 1 equiv of oleic acid on hydrolysis.Draw the structure of an optically inactive fat that yields the same products.

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Question 6

Show the location of the isoprene units in these terpenes:

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Question 7

How are soaps and phosphatides similar in their interaction with water?

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Question 8

There are three major classes of sex hormones:
a.female sex hormones [or ____________]
b.male sex hormones [or ____________]
c.pregnancy hormones [or ______________]

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Question 9

Terpenes are built up from two or more five-carbon units known as __________.

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Question 10

Draw the most stable chair conformation of mentol and label each substituents as axial or equatorial.

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Question 11

Draw the structures of the following substances,in which the alkyl portion is CH₃(CH₂)₁₂-: sodium carboxylate, sodium alkanesulfonate and sodium alkyl sulfate Explain why these substances may be useful as "dirt removers".

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Question 12

Indicate by asterisks the chiral centers present in each of three terpenes shown below:  How many stereoisomers of each are theoretically possible?

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Question 13

Draw the most stable chair conformation of dihydrocarvone.

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Question 14

Sphingolipids,proteins,and polysaccharides make up ___________,the protective coating around nerve fibers.

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Question 15

One of the intermediates in a prostaglandin synthesis is shown below.  Which reaction might be employed to make this molecule from 1,1-dimethoxy-3-nitropropane and an appropriate $\alpha$,$\beta$-unsaturated aldehyde? Show the structural details of the reagents as well as any catalysts that might be needed.

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Question 16

Show all isoprene units in the following structures:

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Question 17

Identify the bonds that link the isoprene units in $\alpha$-farnesene,shown below.How are these units linked: head to head,tail to head or tail to tail ?

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Question 18

Myelin,the protective coating around nerve fibers,is made up of ___________.

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Question 19

Most waxes,commonly found as protective coatings on skin,fur,hair,leaves,fruits,etc. ,are ____________.

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Quiz 23: Lipids

Suggest a mechanism by which ψ-ionone is transformed into β-ionone on treatment with acid.

What products would be obtained from the ozonolysis of zingiberine,found in the oil of ginger?

When natural rubber is heated with sulfur,a reaction takes place that produces _ between the polymer chains.This process is known as _.

Fats can be either optically active or inactive,depending on their structure.Draw the structure of an optically active fat that yields 2 equiv of stearic acid and 1 equiv of oleic acid on hydrolysis.Draw the structure of an optically inactive fat that yields the same products.

Show the location of the isoprene units in these terpenes:

How are soaps and phosphatides similar in their interaction with water?

There are three major classes of sex hormones: a.female sex hormones [or ] b.male sex hormones [or ] c.pregnancy hormones [or __]

Terpenes are built up from two or more five-carbon units known as __________.

Draw the most stable chair conformation of mentol and label each substituents as axial or equatorial.

Draw the structures of the following substances,in which the alkyl portion is CH₃(CH₂)₁₂-: sodium carboxylate, sodium alkanesulfonate and sodium alkyl sulfate Explain why these substances may be useful as "dirt removers".

Indicate by asterisks the chiral centers present in each of three terpenes shown below: How many stereoisomers of each are theoretically possible?

Draw the most stable chair conformation of dihydrocarvone.

Sphingolipids,proteins,and polysaccharides make up ___________,the protective coating around nerve fibers.

Show all isoprene units in the following structures:

Myelin,the protective coating around nerve fibers,is made up of ___________.

Most waxes,commonly found as protective coatings on skin,fur,hair,leaves,fruits,etc. ,are ____________.

Quiz 23: Lipids

Suggest a mechanism by which ψ-ionone is transformed into β-ionone on treatment with acid.

What products would be obtained from the ozonolysis of zingiberine,found in the oil of ginger?

When natural rubber is heated with sulfur,a reaction takes place that produces _____________ between the polymer chains.This process is known as _____________.

Fats can be either optically active or inactive,depending on their structure.Draw the structure of an optically active fat that yields 2 equiv of stearic acid and 1 equiv of oleic acid on hydrolysis.Draw the structure of an optically inactive fat that yields the same products.

Show the location of the isoprene units in these terpenes:

How are soaps and phosphatides similar in their interaction with water?

There are three major classes of sex hormones: a.female sex hormones [or ____________] b.male sex hormones [or ____________] c.pregnancy hormones [or ______________]

Terpenes are built up from two or more five-carbon units known as __________.

Draw the most stable chair conformation of mentol and label each substituents as axial or equatorial.

Draw the structures of the following substances,in which the alkyl portion is CH3(CH2)12-: sodium carboxylate, sodium alkanesulfonate and sodium alkyl sulfate Explain why these substances may be useful as "dirt removers".

Indicate by asterisks the chiral centers present in each of three terpenes shown below: How many stereoisomers of each are theoretically possible?

Draw the most stable chair conformation of dihydrocarvone.

Sphingolipids,proteins,and polysaccharides make up ___________,the protective coating around nerve fibers.

Show all isoprene units in the following structures:

Identify the bonds that link the isoprene units in α\alphaα -farnesene,shown below.How are these units linked: head to head,tail to head or tail to tail ?

Myelin,the protective coating around nerve fibers,is made up of ___________.

Most waxes,commonly found as protective coatings on skin,fur,hair,leaves,fruits,etc. ,are ____________.

When natural rubber is heated with sulfur,a reaction takes place that produces _ between the polymer chains.This process is known as _.

There are three major classes of sex hormones: a.female sex hormones [or ] b.male sex hormones [or ] c.pregnancy hormones [or __]

Draw the structures of the following substances,in which the alkyl portion is CH₃(CH₂)₁₂-: sodium carboxylate, sodium alkanesulfonate and sodium alkyl sulfate Explain why these substances may be useful as "dirt removers".