Chapter 12, Problem 12.33AP

Interpretation Introduction

(a)

Interpretation:

The reason as to why the stretching absorption in infrared spectrum of $\left[\text{S}-\text{H}\right]$ bond is less intense than that of $\left[\text{O}-\text{H}\right]$ bond is to be stated.

Concept introduction:

Infrared spectroscopy or vibrational spectroscopy deals with interaction of infrared radiation with matter. Its frequency ranges from $667-4000{\text{cm}}^{-1}$. The wave number in vibrational spectroscopy is calculated using the formula as shown below.

$\tilde{\nu }=\frac{\text{1}}{\text{2πc}}\sqrt{\frac{k\left(m_1+m_2\right)}{m_1.m_2}}$

Interpretation Introduction

(b)

Interpretation:

Whether the wave number difference between $\left[\text{S}-\text{H}\right]$ and $\left[\text{O}-\text{H}\right]$ is caused by mass of sulfur or by the strength of the bonds is to be stated.

Concept introduction:

Infrared spectroscopy or vibrational spectroscopy deals with interaction of infrared radiation with matter. Its frequency ranges from $667-4000{\text{cm}}^{-1}$. The wave number in vibrational spectroscopy is calculated using the formula as shown below.

$\tilde{\nu }=\frac{\text{1}}{\text{2πc}}\sqrt{\frac{k}{m}}$

Interpretation Introduction

(c)

Interpretation:

The compounds $\text{A}$ and $\text{B}$ are to be identified.

Concept introduction:

Infrared spectroscopy or vibrational spectroscopy deals with interaction of infrared radiation with matter. Its wave number ranges from $667-4000{\text{cm}}^{-1}$. The wave number in vibrational spectroscopy is calculated using the formula as shown below.

$\tilde{\nu }=\frac{\text{1}}{\text{2πc}}\sqrt{\frac{k}{m}}$