What is a selection rule for vibrational (IR) spectroscopy? The angular momentum must change by a value of ±1 (? = ±1) The change in vibrational state is ±1 (? = ±1) The molecule must have a perman
Electronic Transitions and Spectroscopy
The term “electronic” connotes electron, and the term “transition” implies transformation. In a molecule, the electrons move from a lower to a higher energy state due to excitation. The two energy states, the ground state and the excited state are the lowest and the highest energy states, respectively. An energy change is observed with this transition, which depicts the various data related to the molecule.
Photoelectron Spectroscopy
Photoelectron spectroscopy (PES) is a part of experimental chemistry. It is a technique used in laboratories that involves projecting intense beams of radiation on a sample element. In response, the element ejects electrons for which the relative energies are measured.
Three of the term symbols that correspond to a nd2electron configuration are 1S, 3P, and 3 Rank these in terms of increasing energy.
- 1S < 3F < 3P
- 3F < 3P < 1S
- 3P < 3F < 1S
- 1S < 3P < 3F
What is the multiplicity for a state that has two unpaired electrons with parallel spin?
- 0
- 1
- 2
- 3
What is a selection rule for vibrational (IR) spectroscopy?
- The
angular momentum must change by a value of ±1 (? = ±1) - The change in vibrational state is ±1 (? = ±1)
- The molecule must have a permanent dipole
- The molecule must be anisotropic
Step by step
Solved in 3 steps