Related Experiment Video
Updated: Aug 10, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
Published on: July 27, 2018
The C-C-H Bending Vibration Mode (nu4) in the Electronic Ã2Pi and &Xtilde;2Sigma+ States of the CaCCH Radical
Abstract:
The first excited C-C-H bending vibration levels in the CaCCH Ã2Pi and &Xtilde;2Sigma+ states have been rotationally analyzed through cw dye laser excitation spectroscopy of the band. The upper state is subject to Renner-Teller and spin-orbit splittings. Strong K-type resonance interactions were observed between the nearby 2Delta and 2Sigma vibronic components. A total of 667 rotational lines were recorded with high precision and fitted to a model involving a full matrix treatment of the interactions. The Renner-Teller parameter has been determined as epsilon4omega4 = 1.85(4) cm-1. Copyright 1999 Academic Press.
More Related Videos
08:22Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
Published on: August 6, 2018
08:54Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
Published on: January 25, 2020
Related Concept Videos
π Molecular Orbitals of 1,3-Butadiene
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
π Molecular Orbitals of the Allyl Cation and Anion
Radicals: Electronic Structure and Geometry
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals
UV–Vis Spectroscopy: Molecular Electronic Transitions
IR Spectroscopy: Molecular Vibration Overview
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...