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Neutral organic redox pairs based on sterically hindered hydroquinone/benzoquinone derivatives for dye-sensitized solar cells
(2018-06)
Substituted derivatives of hydroquinone/benzoquinone were studied as organic redox mediators in the electrolyte for dye-sensitized solar cells (DSSCs). Thus, di-tert-butylhydroquinone (DTHQ), thymohydroquinone (ThymHQ) and ...
Synthesis of Iodinated Naphthoquinones Using Morpholine-Iodine Complex
(Synthetic Communications Vol. 34, No. 18, pp. 3389–3397, 2004, 2004)
The efficient synthesis of 2‐hydroxy‐3‐iodo‐1,4‐naphthoquinone (3), 2‐amino‐3‐iodo‐1,4‐naphthoquinone (4), and 2‐iodo‐1,4‐naphthoquinone (5) have been developed using the parent naphthoquinone in combination with the ...
Grids III: Hydrogen Bridges in Introductory Chemistry
Cuadrículas III: Puentes de Hidrógeno en Química General
(2021)
Based on IUPAC recommendations for the
definition of the hydrogen bond, a series of
grids is presented to provide instructors of
introductory chemistry courses with visual
examples of H-bridged systems. The grids ...
Orbitals in general chemistry, Part II: Mathematical Realities
(2021)
In Part II of a three-part series, we discuss two factors absent from textbooks of general chemistry that are important in a discussion
of teaching orbitals. First, atomic orbitals are shown systematically to comprise ...
Crystal structure of (E)-2-(tert-butylamino)-4-(tertbutylimino)naphthalen-1(4H)-one
(2018)
The title compound, C18H24N2O, is the first example of a naphthoquinone imine derivative isolated in the 4-imine/2-amine tautomeric form having bulky alkyl substituents at the N atoms. The molecular conformation is stabilized ...
Efficient syntheses of streptocarpone and (±)-a-dunnione
(2007)
An efficient divergent synthesis of both streptocarpone and racemic α-dunnione from lawsone are described. A one-pot, formal [3+2] cyclization to form a furanonaphthoquinone directly provided a common intermediate.
Grids II: Aromatic Acidity and Basicity
Cuadrículas II: Acidez y Basicidad Aromática
(2021)
The effect of substituents on the acidity of benzoic acids
and basicity of anilines has been organized in grids to
demonstrate the inductive and resonance effects. The
relation between structure and pKa is emphasized ...
Crystal structure of 4-[(adamantan-1-yl)amino]naphthalene-1,2-dione
(2019)
The title compound, C20H21NO2, an example of a stable 1,2-naphthoquinone, was determined by single-crystal X-ray diffraction analysis at 100 K. This structure illustrates steric buttressing of the adamantanyl group, forcing ...