symmetry of molecules
121Magnetic circular dichroism — (MCD) is the differential absorption of left and right circularly polarized (LCP and RCP) light, induced in a sample by a strong magnetic field oriented parallel to the direction of light propagation. MCD measurements can detect transitions which …
122High-temperature superconductivity — Unsolved problems in physics What causes superconductivity at temperatures above 50 kelvin? High temperature superconductors (abbreviated high Tc or HTS) are materials that have a superconducting transition temperature (Tc) above 30 K… …
123Enantiomer — This article is about the concept in chemistry. For a discussion of enantiomers in mathematics, see Chirality (mathematics). (S) (+) lactic acid (left) and (R) (–) lactic acid (right) are nonsuperposable mirror images of each other In chemistry,… …
124Transmission electron microscopy — A TEM image of the polio virus. The polio virus is 30 nm in size.[1] Transmission electron microscopy (TEM) is a microscopy technique whereby a beam of electrons is transmitted through an ultra thin specimen, interacting with the specimen as it… …
125Molecular orbital theory — In chemistry, molecular orbital (MO) theory is a method for determining molecular structure in which electrons are not assigned to individual bonds between atoms, but are treated as moving under the influence of the nuclei in the whole… …
126Trigonal pyramidal molecular geometry — Infobox molecular geometry Symmetry group= C3v Electron direction=4 Atom direction=3 Bond angle …
127Molecular model — A molecular model, in this article, is a physical model that represents molecules and their processes. The creation of mathematical models of molecular properties and behaviour is molecular modelling, and their graphical depiction is molecular… …
128Renner-Teller effect — The Renner Teller effect is an effect due to rovibronic coupling on the electronic spectra of three (or more) atomic linear molecules in degenerate electronic (Π, Δ, ..., etc.) states.In its original formulation, the Renner Teller effect was a… …
