biradical वाक्य
उदाहरण वाक्य
मोबाइल
- Equilibrium of kedarcidin chromophore core and Bergman-cycloaromatized biradical.
- Another classic biradical was synthesised by Tschitschibabin in 1907.
- Infrared spectroscopy suggests the electronic structure is a zwitterion rather than a biradical as some had proposed.
- Egyptian has many biradical and perhaps monoradical roots, in contrast to the Semitic preference for triradical roots.
- It has a triplet ground state consisting of a phenyl anion and a " m "-xylylene biradical.
- Photolysis of "'2 "'results in the initial formation of an biradical intermediate with a cyclopropane ring formed.
- The reaction proceeds by a thermal reaction or pyrolysis ( above 200 �C ) forming a short-lived and very reactive para-benzyne biradical species.
- This photolysis leads to a biradical which forms prismane ( "'6 "') and nitrogen with a yield of less than 10 %.
- The formed nucleophile will attack the double bound in the ringstructure from another isophorone, which will form a biradical and finally the HT or HH tricyclic diketomer.
- The resonance structures of the quinoid "'3a "'and the biradical "'3b "'contribute equally to the hybrid structure.
- A biradical mechanism is also proposed for the formation of certain biomolecules found in marine " sporolides " that have a chlorobenzene unit as part of their structure.
- Nevertheless, strained alkyne is a better description of the triple bond nature of ortho-benzyne than biradical ( larger singlet-triplet gap and alkyne-like reactivity ).
- "' Butalene "'is a polycyclic hydrocarbon composed of two 1, 4-didehydrobenzene biradical, the valence isomer in which that bridged bond is broken.
- In a model system, it was found that the 5, 9-bicyclic core of kedarcidin chromophore exists in equilibrium with the corresponding 5, 5, 6-tricyclic cycloaromatized biradical.
- An oxyallyl intermediate or valence tautomer ( formed by cleavage of the C2-C3 bond ) is suggested as the active intermediate or even a biradical structure ( compare to the related trimethylenemethane ).
- The rate of pseudo-first-order decay of this model enediyne is highly dependent on the solvent hydrogen-donor ability, indicating that the hydrogen abstraction step following biradical formation is kinetically significant in the cycloaromatization of the enediyne, as opposed to acyclic systems, where formation of the biradical itself is known to be the rate-limiting step.
- The rate of pseudo-first-order decay of this model enediyne is highly dependent on the solvent hydrogen-donor ability, indicating that the hydrogen abstraction step following biradical formation is kinetically significant in the cycloaromatization of the enediyne, as opposed to acyclic systems, where formation of the biradical itself is known to be the rate-limiting step.
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