Lewis Superacidic Ionic Liquids with Tricoordinate Borenium Cations

The first examples of ionic liquids based on borenium cations, [BCl2L](+), are reported. These compounds form highly Lewis acidic liquids under solvent-free conditions. Their acidity was quantified by determining the Gutmann acceptor number (AN). Extremely high ANs were recorded (up to AN=182, delta(31P)=120 ppm), demonstrating that these borenium ionic liquids are the strongest Lewis superacids reported to date, with the acidity enhanced by the ionic liquid environment.

Reduction vs acetalisation of some carbonyl-compounds by means of methylselenol and lewis-acids

Aliphatic ketones and aromatic carbonyl compounds on reaction with methylselenol :and a Lewis acid, are shown to undergo acetalisation and/or reduction to methyl selenide, the unexpected reduction reaction being predominant in most cases.

Católicos e política na crise do liberalismo: o percurso de António Lino Neto(1873-1934)

Tese apresentada para cumprimento dos requisitos necessários à obtenção do grau de Doutor em História, especialidade em História Contemporânea

Ingria, e la Carelia Russa : tratte da una carta del Golfo di Finlandia publicata dal Banco di Agrimensura di Stockolm nel 1788. Ab. Borghi disegno.

Huomautus: Pasguali scrisse.

Geographische Chartae über das Wiburgsche, Friedrichshamnsche, Willmanstrandsche, Neüslottsche und Kexholmsche Kreis des Wiburgschen Gouvernements, verfasset im Jahr. 1788

1 kartta : käsinpiirros, vär. ; 90,5 x 91 cm, lehti 94 x 94 cm. Kankaalle liimattu.

Bulletin - Société de Saint-Jean pour l'encouragement de l'art chrétien (1873)

Variante(s) de titre : Bulletin de la Société de Saint-Jean