biradical


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biradical

(ˌbaɪˈrædɪkəl)
n
(Biochemistry) a molecule with two centres
References in periodicals archive ?
Nonetheless, and according to the restriction of the Pauli principle, if a biradical molecule has its electrons spin in a parallel rotation, then the energy of spinning cannot be dissipated by pairing in an orbital [18].
Analysis of the ([S.sup.2]) value for the transition state of both IVb (~0.57) and IVa (~0.55) showed that these structures have a biradical character.
(b) biradical nouns with trisyllabic vocalic stems such as luhuD 'short' and pere 'family' in the genitive singular and nominative plural forms, e.g.
Ziessel, "Structural control of ferromagnetic interactions in Nickel(Ii) complexes based on a tetradentate biradical," Chemical Communications, vol.
In consideration of charge transfer not being observed, stage 2 may be defined as "biradical stage." In stage 3 (920-1600 fs), the energy gap increases to about 1 eV.
The corrole dimer 26 exhibits very broad absorption bands, which reach to 1700 nm because of its substantial biradical character.
Molecular oxygen ([O.sub.2]) is a biradical which contains 2 unpaired electrons with parallel spin configurations.
APPLICATION OF THE DECARBOXYLATIVE PHOTOCYCLIZATION: MEMORY OF CHIRALITY EFFECTS IN TRIPLET BIRADICAL REACTIONS
The detection of the Criegee biradical and measurement of how fast it reacts was made possible by a unique apparatus, designed by Sandia researchers, that uses light from a third-generation synchrotron facility, at the Lawrence Berkeley National Laboratory's Advanced Light Source.
The most reactive state is the triplet state (T*) in which carbonyl groups exist as a biradical. The biradicals could abstract hydrogen from a polymer molecule (RH) and formation of a kelyl radical (R*) (18).
It has fueled the centuries-old debate of whether the Semitic lexicon is primarily built on biradical or triradical bases, that is, whether triradical roots are original or developed out of a more archaic biconsonantal base.
The vertically expanded portions of the spectra measured at 433 K (downward arrows in Figure 5) indicate signals from the biradical, 2NO-HAS, in both samples.