The molecule, methylacetamide is polar or not has to be identified. Concept Introduction: The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity. A molecule is non-polar, if the charge distribution is symmetric and a molecule is polar if the charge distribution is asymmetric. I a molecule us symmetric in shape it is said to be non-polar. If a molecule is not regular, it is said to be polar.

Question

NMR spectrum of ethyl acetate has signals whose chemical shifts are indicated below. Which hydrogen or set of hydrogens corresponds to the signal at 4.1 ppm? Select the single best answer. The H O HỌC—C—0—CH, CH, 2 A ethyl acetate H NMR: 1.3 ppm, 2.0 ppm, 4.1 ppm Check OA B OC ch B C Save For Later Submit Ass © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center |

Answer 1

Question

Chapter 8, Problem 90IL

(a)

Interpretation Introduction

Interpretation:

The molecule, methylacetamide is polar or not has to be identified.

Concept Introduction:

The unequal distribution of shared electrons caused by differences in electronegativity between bonded atoms is called bond polarity.

A molecule is non-polar, if the charge distribution is symmetric and a molecule is polar if the charge distribution is asymmetric.

I a molecule us symmetric in shape it is said to be non-polar. If a molecule is not regular, it is said to be polar.

(b)

Interpretation Introduction

Interpretation:

The expected position of positive and negative charges in methylacetamide has to be predicted and also identify whether the electrostatic potential surface confirm the prediction.

Concept Introduction:

Electrostatic potential surface or maps are known as molecular electrical potential surfaces, that illustrates the charge distributions of molecules three dimensionally.

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NMR spectrum of ethyl acetate has signals whose chemical shifts are indicated below. Which hydrogen or set of hydrogens corresponds to the signal at 4.1 ppm? Select the single best answer. The H O HỌC—C—0—CH, CH, 2 A ethyl acetate H NMR: 1.3 ppm, 2.0 ppm, 4.1 ppm Check OA B OC ch B C Save For Later Submit Ass © 2025 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center |

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