The High Resolution Infrared Analysis of Allene
Faculty Sponsor
Anthony Masiello, Eastern Washington University
Research Project Abstract
The high resolution (0.0013 cm-1) infrared spectrum of allene (C3H4) has been analyzed for the v11 band centered at 352.6 cm-1. Allene is a prolate symmetric top molecule (Ia< Ib= Ic) of D2h molecular point group symmetry. The v11 band originates from an excitation of a vibrational mode perpendicular to the molecular symmetry axis and results in infrared transitions in which both the K and l quantum numbers necessarily change. Over 2150 transitions were assigned to K and J levels extending up to K=14 and J=52, and no perturbations were observed. This vibration is low in energy and provides a reliable way of measuring the ground state rotational constants which can then be used to determine structural parameters for the molecule as well as facilitate determining the energy levels of other higher energy vibration states that are perturbed.
Session Number
PS2
Location
Graves Gym
Abstract Number
PS2-u
The High Resolution Infrared Analysis of Allene
Graves Gym
The high resolution (0.0013 cm-1) infrared spectrum of allene (C3H4) has been analyzed for the v11 band centered at 352.6 cm-1. Allene is a prolate symmetric top molecule (Ia< Ib= Ic) of D2h molecular point group symmetry. The v11 band originates from an excitation of a vibrational mode perpendicular to the molecular symmetry axis and results in infrared transitions in which both the K and l quantum numbers necessarily change. Over 2150 transitions were assigned to K and J levels extending up to K=14 and J=52, and no perturbations were observed. This vibration is low in energy and provides a reliable way of measuring the ground state rotational constants which can then be used to determine structural parameters for the molecule as well as facilitate determining the energy levels of other higher energy vibration states that are perturbed.
