Anagram & Information om | Engelska ordet DIRADICAL

Exempel på hur man kan använda DIRADICAL i en mening

• Molecular oxygen (dioxygen) is a diradical containing two unpaired electrons, and superoxide results from the addition of an electron which fills one of the two degenerate molecular orbitals, leaving a charged ionic species with a single unpaired electron and a net negative charge of −1.
• Nevertheless, benzyne is more like a strained alkyne than a diradical, as seen from the large singlet–triplet gap and alkyne-like reactivity.
• Visible radiation induces cis-trans isomerization, although further irradiation can excite the molecule to a triplet diradical state.
• The deprotection proceeds through a triplet diradical (3) and a dione spiro intermediate (4) although the latter has thus far eluded detection.
• Formation of the diradical pair 3 allows for radical decarboxylation to form the diradical pair 4, which recombines to form the organic halide 5.
• When the unpaired electrons with opposite spin are antiferromagnetically coupled, diradical species can display a singlet state (S=0) and be diamagnetic.
• The first reports of stable nonacene derivatives claimed that due to the electronic effects of the thioaryl substituents the compound is not a diradical but a closed-shell compound with the lowest HOMO-LUMO gap reported for any acene, an observation in violation of Kasha's rule.
• This diradical, 1,4-didehydrobenzene, then abstracts hydrogen atoms from the deoxyribose (sugar) backbone of DNA, which ultimately leads to strand scission.
• In acyclic dienes, this free rotation leads to diradical reconnection, short-circuiting the di-π-methane process.
• The cyclization of the enediyne functional group creates a transient reactive 1,4-benzenoid diradical that acts as a nucleophile and attacks electrophiles in order to achieve a more stable form.
• At this point, the enone forms an exciplex with the ground state alkene, eventually giving the triplet diradical.
• reported on one such reaction in which an azo compound is lysed via photolysis to form the diradical hydrocarbon and then trapped in a stepwise fashion by molecular oxygen:.
• Many radiomimetic compounds are enediynes, which undergo the Bergman cyclization reaction to produce a 1,4-didehydrobenzene diradical.
• Four mechanisms for thermal isomerizations have been proposed: a dyotropic mechanism, a diradical mechanism, and two benzene ring contraction mechanisms; a 1,2-carbon shift to a carbene preceding a 1,2-hydrogen shift, and a 1-2-hydrogen shift to a carbene followed by a 1,2-carbon shift.
• These phenol group oxidations yield a diradical species that undergoes ortho coupling to the phenol group of the tetrahydroisoquinoline and para coupling to the benzyl group to create the salutaridinol precursor salutaridine.
• JM Lenhardt, MT Ong, R Choe, CR Evenhuis, TJ Martinez, and SL Craig, "Trapping a diradical transition state by mechanochemical polymer extension", Science, 329, 1057–1060 (2010).
• The diradical formation in the Bergman cyclization provides a potent mechanism for DNA scission and crosslinking by abstracting hydrogens from adjacent ribose sugars, which can then bond to kink or cleave the strand entirely, rendering the DNA of the target cell unusable.
• He developed the electronic theory of diradicals, as well as the concepts of diradical and zwitterionic states.

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