Question 1

What would be the proper name of the following?

Accepted Answer

C

Question 2

What would be the name of the following compound?

Accepted Answer

B

Question 3

The following molecule contains how many units of unsaturation?

Accepted Answer

D

Question 4

The following molecule contains how many units of unsaturation?

Accepted Answer

The answer of The following molecule contains how many units...

Question 5

How many units of unsaturation are indicated by the following molecular formula: C₁₇H₁₈BrI₂O₂N ?

Accepted Answer

To determine the number of units of unsaturation, we must consider the presence of double bonds, triple bonds, and rings. The formula contains one sulfur with a positive charge, indicating it is involved in a double bond with another atom. There is also a bromine attached to a carbon atom, indicating the presence of a double bond. The presence of an oxygen atom and two nitrogen atoms indicates the possibility of forming two rings. Finally, there are several hydrogen atoms, which could potentially eliminate a unit of unsaturation if present in pairs. Counting all of these, we get a total of 8 units of unsaturation.

Question 6

Infrared spectroscopy relies on what phenomenon?

Accepted Answer

Infrared spectroscopy relies on the molecular stretching and bending of chemical bonds in a molecule, which produces characteristic frequencies of absorbed or transmitted radiation.

Question 7

What functional group would be indicated by an IR absorption at 2150 cm^-¹?

Accepted Answer

The answer of What functional group would be indicated by...

Question 8

What would be the organic product of the following reaction?

Accepted Answer

The answer of What would be the organic product of...

Question 9

What functional group would be indicated by an IR absorption at 1650 cm^-¹?

Accepted Answer

The answer of What functional group would be indicated by...

Question 10

The greatest strength of infrared spectroscopy is in determining

Accepted Answer

The greatest strength of infrared spectroscopy is in determining the functional groups present in a molecule. This is because infrared spectroscopy is based on the absorption of infrared radiation by the functional groups in a molecule, which produces a unique infrared spectrum. By analyzing the peaks in the spectrum, it is possible to determine the types of functional groups that are present in the molecule.

Question 11

The IR spectrum of a compound shows a strong absorbance peak at 1720 cm^-¹.What functional group is indicated?

Accepted Answer

The strong absorbance peak at 1720 cm^-1 indicates the presence of a C=O (carbonyl) functional group.

Question 12

Under special reaction conditions,$\alpha$-pinene and $\beta$-pinene can be in equilibrium (caused to interconvert reversibly).Using your knowledge of alkene stability,which of the following would be true at equilibrium?

Accepted Answer

The answer of Under special reaction conditions,$\alpha$-pinene and $\beta$-pinene can...

Question 13

How many degrees of unsaturation are present in the following molecule?

Accepted Answer

The answer of How many degrees of unsaturation are present...

Question 14

Predict the major product of the following reaction:

Accepted Answer

The answer of Predict the major product of the following...

Question 15

Which of the following are of lowest energy?

Accepted Answer

Radio waves have the longest wavelength and lowest frequency, resulting in the lowest energy among the options listed.

Question 16

Which of the following most accurately describes the IR fingerprint region:

Accepted Answer

The IR fingerprint region is typically defined as the range from 600 to 1500 cm^-1. This region is unique for different molecules, providing a "fingerprint" for identification.

Question 17

Which of the following are (Z)isomers?

Accepted Answer

Z isomers have the functional groups on the same side of the double bond. The functional groups on compounds 2 and 5 are on the same side of the double bond, making them Z isomers. The functional groups on compounds 1, 3, and 4 are on opposite sides of the double bond, making them E isomers. Therefore, choice B, which includes compounds 2 and 5, is the best choice.

Question 18

A hydrocarbon with the molecular formula C₇H₁₂ exhibits the following spectroscopic data: ¹H NMR $\delta$ = 1.3 (m,2H),1.7 (m,4 H),2.2 (m,4H),and 4.8 (quin,J = 3 Hz,2H)ppm; ¹³C NMR: $\delta$ = 26.8,28.7,35.7,106.9,and 149.7 ppm.The IR spectrum has key absorbances at 3072,2950,and 1649 cm^-¹.Hydrogenation of the compound furnishes a product with the molecular formula C₇H₁₄.Which structure is consistent with this data?

Accepted Answer

The answer of A hydrocarbon with the molecular formula C₇H₁₂...

Question 19

The following molecule contains how many units of unsaturation?

Accepted Answer

The answer of The following molecule contains how many units...

Question 20

Which of the following alkenes of the formula C₅H₁₀ would you expect to be the least stable?

Accepted Answer

The answer of Which of the following alkenes of the...

Quiz 11: Alkenes: Infrared Spectroscopy and Mass Spectrometry

What would be the proper name of the following?

What would be the name of the following compound?

The following molecule contains how many units of unsaturation?

The following molecule contains how many units of unsaturation?

How many units of unsaturation are indicated by the following molecular formula: C₁₇H₁₈BrI₂O₂N ?

Infrared spectroscopy relies on what phenomenon?

What functional group would be indicated by an IR absorption at 2150 cm^-¹?

What would be the organic product of the following reaction?

What functional group would be indicated by an IR absorption at 1650 cm^-¹?

The greatest strength of infrared spectroscopy is in determining

The IR spectrum of a compound shows a strong absorbance peak at 1720 cm^-¹.What functional group is indicated?

How many degrees of unsaturation are present in the following molecule?

Predict the major product of the following reaction:

Which of the following are of lowest energy?

Which of the following most accurately describes the IR fingerprint region:

Which of the following are (Z) isomers?

The following molecule contains how many units of unsaturation?

Which of the following alkenes of the formula C₅H₁₀ would you expect to be the least stable?

Quiz 11: Alkenes: Infrared Spectroscopy and Mass Spectrometry

What would be the proper name of the following?

What would be the name of the following compound?

The following molecule contains how many units of unsaturation?

The following molecule contains how many units of unsaturation?

How many units of unsaturation are indicated by the following molecular formula: C17H18BrI2O2N ?

Infrared spectroscopy relies on what phenomenon?

What functional group would be indicated by an IR absorption at 2150 cm-1?

What would be the organic product of the following reaction?

What functional group would be indicated by an IR absorption at 1650 cm-1?

The greatest strength of infrared spectroscopy is in determining

The IR spectrum of a compound shows a strong absorbance peak at 1720 cm-1.What functional group is indicated?

Under special reaction conditions, α\alphaα -pinene and β\betaβ -pinene can be in equilibrium (caused to interconvert reversibly) .Using your knowledge of alkene stability,which of the following would be true at equilibrium?

How many degrees of unsaturation are present in the following molecule?

Predict the major product of the following reaction:

Which of the following are of lowest energy?

Which of the following most accurately describes the IR fingerprint region:

Which of the following are (Z) isomers?

The following molecule contains how many units of unsaturation?

Which of the following alkenes of the formula C5H10 would you expect to be the least stable?

How many units of unsaturation are indicated by the following molecular formula: C₁₇H₁₈BrI₂O₂N ?

What functional group would be indicated by an IR absorption at 2150 cm^-¹?

What functional group would be indicated by an IR absorption at 1650 cm^-¹?

The IR spectrum of a compound shows a strong absorbance peak at 1720 cm^-¹.What functional group is indicated?

Which of the following alkenes of the formula C₅H₁₀ would you expect to be the least stable?