The structural formula for the hemiacetal and then acetal formed in the given reaction has to be drawn. Concept Introduction: The structural formula of a compound shows how the atoms are arranged in a molecule and, in particular, shows which functional groups are present. Hydrocarbon compound which contain a hydroxyl group and an alkoxy group is known as Hemiacetals. Hemiacetal can be prepared by the addition of alcohol to an aldehyde or ketone in the presence of an acid catalyst. Hemiacetals react with a second alcohol molecule to produce an acetal, which contains a carbon with two alkoxy groups –OR.

Question

Q2: Ranking Acidity a) Rank the labeled protons in the following molecule in order of increasing pKa. Briefly explain the ranking. Use Table 2.2 as reference. Ha Нь HC H-N Ha OHe b) Atenolol is a drug used to treat high blood pressure. Which of the indicated N-H bonds is more acidic? Explain. (Hint: use resonance structures to help) Name the functional groups on atenolol. H H-N atenolol Ν H-N OH Н

Answer 1

Question

Chapter 16, Problem 16.30P

(a)

Interpretation Introduction

Interpretation:

The structural formula for the hemiacetal and then acetal formed in the given reaction has to be drawn.

Concept Introduction:

The structural formula of a compound shows how the atoms are arranged in a molecule and, in particular, shows which functional groups are present.

Hydrocarbon compound which contain a hydroxyl group and an alkoxy group is known as Hemiacetals. Hemiacetal can be prepared by the addition of alcohol to an aldehyde or ketone in the presence of an acid catalyst. Hemiacetals react with a second alcohol molecule to produce an acetal, which contains a carbon with two alkoxy groups –OR.

(b)

Interpretation Introduction

Interpretation:

The structural formula for the hemiacetal and then acetal formed in the given reaction has to be drawn.

Concept Introduction:

The structural formula of a compound shows how the atoms are arranged in a molecule and, in particular, shows which functional groups are present.

Hydrocarbon compound which contain a hydroxyl group and an alkoxy group is known as Hemiacetals. Hemiacetal can be prepared by the addition of alcohol to an aldehyde or ketone in the presence of an acid catalyst. Hemiacetals react with a second alcohol molecule to produce an acetal, which contains a carbon with two alkoxy groups –OR.

(c)

Interpretation Introduction

Interpretation:

The structural formula for the hemiacetal and then acetal formed in the given reaction has to be drawn.

Concept Introduction:

The structural formula of a compound shows how the atoms are arranged in a molecule and, in particular, shows which functional groups are present.

Hydrocarbon compound which contain a hydroxyl group and an alkoxy group is known as Hemiacetals. Hemiacetal can be prepared by the addition of alcohol to an aldehyde or ketone in the presence of an acid catalyst. Hemiacetals react with a second alcohol molecule to produce an acetal, which contains a carbon with two alkoxy groups –OR.

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Q2: Ranking Acidity a) Rank the labeled protons in the following molecule in order of increasing pKa. Briefly explain the ranking. Use Table 2.2 as reference. Ha Нь HC H-N Ha OHe b) Atenolol is a drug used to treat high blood pressure. Which of the indicated N-H bonds is more acidic? Explain. (Hint: use resonance structures to help) Name the functional groups on atenolol. H H-N atenolol Ν H-N OH Н

Answer d, e, and f

If the rotational constant of a molecule is B = 120 cm-1, it can be stated that the transition from 2←1:a) gives rise to a line at 120 cm-1b) is a forbidden transitionc) gives rise to a line at 240 cm-1d) gives rise to a line at 480 cm-1