Question

Key terms: Reset The mass spectrometry is inversely proportional to the wavelength and reported in reciprocal centimeters (cm−1). A technique used for measuring the molecular weight and determining the molecular formula of an organic molecule is infrared spectroscopy. A compound that contains an odd number of vibration atoms gives a molecular ion an odd mass. When the molecular ion consists of two peaks (M and M 2) in a 1:1 ratio, a ____________ atom is present in the molecule. For a bond to absorb in the IR, there must be a change in the dipole moment during the ____________ . Organic chemists use ____________ to identify the functional groups in a compound. When the molecular ion consists of two peaks (M and M 2) in a 3:1 ratio, a ____________ atom is present in the molecule. The higher the percent s-character, the strong the bond, and the ____________ the wavenumber of an IR absorption. Hydrocarbons and compounds that only contain C, H, and O atoms always have a molecular ion with an odd mass.

Answer 1

a. Bromine

b. vibration

c. Infrared spectroscopy

d. Chlorine

e. Higher

Step-by-step explanation:

Infrared spectrometry (IV spectroscopy) is a type of absorption spectrometry that uses the infrared region of the electromagnetic spectrum. Like the other spectroscopic techniques, it can be used to identify a compound or investigate the composition of a sample.

Infrared spectrometry is based on the fact that the chemical bonds of substances have specific vibration frequencies, which correspond to the energy levels of the molecule. These frequencies depend on the shape of the potential energy surface of the molecule, molecular geometry, atomic masses and, possibly, vibrational coupling.

The IR spectrum has different regions. The left part of the spectrum shows the voltages C-H, O-H and N-H. The triple bonds absorb about 2200 cm-1 followed by the double bonds to the right at around 1700 cm-1. The region below 1400 cm-1 is called the fingerprint region.