An attosecond is 10-18s. The chemistry that takes place on this timescale is called electron dynamics. For example, it is the time taken for an electron to traverse the 1s orbit in a hydrogen atom. And chemists are starting to manipulate electrons (and hence chemistry) on this timescale; for example a recent article (DOI: 10.1021/ja206193t) describes how to control the electrons in benzene using attosecond laser pulses.
Posts Tagged ‘G/RT’
Chemistry in an attosecond.
Friday, November 4th, 2011Tags:attosecond, chemical processes, exasecond, free energy barrier, G/RT, Inga Ulusoy, laser, Mathias Nest, Tutorial material
Posted in General, Interesting chemistry | 1 Comment »
Rate enhancement of the Diels-Alder reaction inside a cavity
Saturday, October 30th, 2010Reactions in cavities can adopt quite different characteristics from those in solvents. Thus first example of the catalysis of the Diels-Alder reaction inside an organic scaffold was reported by Endo, Koike, Sawaki, Hayashida, Masuda, and Aoyama[cite]10.1021/ja964198s[/cite], where the reaction shown below is speeded up very greatly in the presence of a crystalline lattice of the anthracene derivative shown below.
Tags:animation, catalysis, free energy, free energy barrier, G/RT, Interesting chemistry, Organic scaffold, pericyclic
Posted in Interesting chemistry | 7 Comments »