Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 7651-82-3, is researched, Molecular C9H7NO, about Hueckel molecular orbital [HMO] study of monohydroxypyridines and their benzoderivatives, the main research direction is Hueckel MO hydroxy pyridine; quinoline Hueckel MO; isoquinoline Hueckel MO; acridine Hueckel MO; phenanthridine Hueckel MO.Related Products of 7651-82-3.
Fifteen monohydroxy derivatives of pyridine, quinoline, isoquinoline, acridine, and phenanthridine were studied by simple HMO method. These compounds, in which possibility of keto-enol tautomerism must be considered can participate in chem. reactions in two mol. forms. The simple HMO method, despite its strongly approximative character, satisfactorily interprets exptl. data of the chem. properties of studied compounds The quantum-chem. approach, based on estimation of values of chem. reactivity indexes, fails to give a true picture of the reactivity of aromatic ring of benzo derivatives, in the HMO models of which Coulomb or exchange integrals are not changed on these rings as a result of the introduction of a substituent or an heteroatom. The results show that in most of the reactions studied tautomerism does not affect significantly the order of reactivity of the individual positions of the π-electrone system.
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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method