Detailed studies of the molecular and electronic structures, vibrational frequencies, and infrared intensities of [M -] and [M-H -] anions of aniline and its derivatives (2-, 3-, 4-fluoroanilines, N-[(2E)-1-methylbut-2-en-1-yl]aniline, (2-cyclopent-2-en-1-ylphenyl)amine, N-[(2E)-1-methylbut-2-en-1-yl]aniline, and N-cyclopent-2-en-1-ylaniline) have been carried out using the density functional method with UB3LYP functional and 6-31G** basis set augmented with sp diffuse functions on nitrogen, fluorine, and three carbon atoms of benzene ring (in 2, 4, and 6 positions). For comparison, similar calculations were carried out for the closed-shell neutral molecules ([M]). The studies have provided detailed insight into the structure changes that take place in negative ions of aniline and its derivatives.

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Die Sulfolene (I) und (III) reagieren mit Diazomethan unter Cyclisierung zu Tetrahydrothienopyrazolen (II) und (IV).

Die aus den Dichlorphosphinen (I) und (IX) durch Einwirkung von Acetanhydrid (II) und Methyl‐isopropenylketon (III) erhältlichen 2‐Oxo‐l ,2‐oxaphospholene (IV) und (X) werden zu den Verbindungen (V) und (XI) chloriert.