Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 253-52-1, Name is Phthalazine. In a document type is Article, introducing its new discovery., 253-52-1
Electron-Hole Correlation as Unambiguous and Universal Classification for the Nature of Low-Lying pipi? States of Nitrogen Heterocycles
The 1La and 1Lb classification of electronically excited states of cata-condensed hydrocarbons proposed by Platt in 1949 (Platt, J. R. J. Chem. Phys. 1949, 17, 484) is challenged by investigating a series of N-heteronaphthalenes and comparison of their low-lying pipi? excited states to those of naphthalene. The breakdown of Platt’s classification scheme for N-heterocycles is highlighted, and a reliable and versatile alternative using exciton analyses is presented. The strength of electron-hole correlation turns out to be the most reliable distinguishing feature, and thus, an alternative nomenclature of 1Lw (weakly correlated) and 1Ls (strongly correlated) is proposed. Furthermore, fundamental guidelines for their property modulation through N-atom substitution patterns are discussed.
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Reference£º
Phthalazine – Wikipedia,
Phthalazine | C8H6N186 – PubChem