Concept

Möbius aromaticity

Publications associées (52)

Selective three-phase hydrogenation of aromatic nitro-compounds over beta-molybdenum nitride

Lioubov Kiwi, Fernando Cardenas Lizana, Daniel André Samuel Lamey

A tetragonal molybdenum nitride (beta-Mo2N) has been prepared by temperature programmed treatment of MoO3 in flowing N-2 + H-2 and for the first time shown to catalyze the liquid phase selective hydrogenation (T = 423 K; P-H2 = 11 bar) of a series of para- ...

2011

Kinetic Control in the Chiral Recognition of Three-Bladed Propellers

Natalie Renuka Banerji, Jérôme Lacour

The ion pair of the stereolabile C3-symmetric, i+o proton complex [1⋅H]+ of diaza-macropentacycle 1 and the configurationally stable Δ-TRISPHAT ([Δ-3]−) anion exists in the form of two diastereomers, namely, [Δ-(1⋅H)][Δ-3] and [Λ-(1⋅H)][Δ-3], the ratio of ...

2010

Double aromaticity in monocyclic carbon, boron, and borocarbon rings based on magnetic criteria

Matthew Wodrich

The double-arom. character of selected monocyclic carbon, boron, and borocarbon rings is demonstrated by refined nucleus-independent chem. shift (NICS) analyses involving the contributions of individual canonical MOs and their out-of-plane NICS tensor comp ...

2007

Aromaticity of tri- and tetranuclear metal-carbonyl clusters based on magnetic criteria

Recently, the sigma-aromaticity model proposed for cyclopropane by Dewar was employed to account for the stability of Group 8 trinuclear metal-carbonyl compds. [M3(CO)12] (M = Fe, Ru, Os). This paper further examines this hypothesis and provides the first ...

2007

Conformation-specific infrared and ultraviolet spectroscopy of tyrosine-based protonated dipeptides

Thomas Rizzo, Monia Guidi

We present the spectroscopy and photofragmentation dynamics of two isomeric protonated dipeptides, H+AlaTyr and H+TyrAla, in a cold ion trap. By a combination of infrared-ultraviolet double resonance experiments and density functional theory calculations, ...

2007

Are Antiaromatic Rings Stacked Face-to-Face Aromatic?

The stacking of 4n pi electron hydrocarbon rings into superphane structures can eliminate their antiaromaticity and result in through-space three-dimensional arom. character. This is demonstrated by the bond length equalized geometries and diatropic NICS v ...

2007

Conformation-specific spectroscopy and photodissociation of cold, protonated tyrosine and phenylalanine

Thomas Rizzo, Monia Guidi, Sébastien Mercier, Caroline Seaiby

We present here ultraviolet and infrared spectra of protonated aromatic amino acids in a cold, 22-pole ion trap. Ultraviolet photofragmentation spectra of protonated tyrosine and phenylalanine show vibronically resolved bands corresponding to different sta ...

2007

Photocatalytic degradation of p-halophenols in TiO2aqueous suspensions: halogen effect on removal rate aromatic intermediates and toxicity variations

César Pulgarin

he influence of the halogen upon the TiO2 photocatalytic degradation of p-halophenols in water has been investigated. Phenol was used as the reference compound. Compared with its value for phenol, the apparent first-order rate constant of removal, k, was s ...

2006

Which NICS Aromaticity Index for Planar pi Rings Is Best?

Five increasingly sophisticated aromaticity indexes, based on nucleus-independent chem. shifts (NICS), were evaluated against a uniform set of arom. stabilization energies (ASE) for 75 mono- and polyheterocyclic five-membered rings. While acceptable statis ...

2006

Electrochemical incineration of chloromethylphyenoxy herbicides in acid medium by anodic oxidation with boron-doped diamond electrodes

Christos Comninellis, Béatrice Marselli Fuerer, Pierre-Alain Michaud

The electrochemical degradation of saturated solutions of herbicides 4-chloro-2-methylphenoxyacetic acid, 2-(4-chlorophenoxy)-2-methylpropionic acid and 2-(4-chloro-2-methylphenoxy)propionic acid in 1 M HClO4 on a boron-doped diamond (BDD) thin film anode ...

2006

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