1,721,599 research outputs found
Le anomalie nel rapporto fra il controlling creditor e le imprese finanziarie: spunti comparatistici
No full textGratuità e onerosità delle garanzie per debito altrui a seguito della riforma della disciplina della revocatoria fallimentare
No full textLa responsabilità da direzione e coordinamento "istituzionalizzata" mediante il voto in assemblea
No full textla responsabilità ex art.2497 c.c. della banca e le soluzioni negoziali delle crisi di impresa
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Commento agli artt. 67 bis, 68, 69, 69 bis, 70 l.fall.), in Aa.Vv., Gli effetti del fallimento
No full textAROMATICITY, ELECTRONIC-STRUCTURE AND MOLECULAR DIMENSION IN THE ADSORPTION OF ORGANIC-COMPOUNDS ON MERCURY .1. THE METAL ADSORBATE INTERACTION
No full textThe adsorbability of a wide series of aromatic derivatives (38) on mercury from aqueous solution at constant potential (E(pzc) or close to it) cannot be simply accounted for by the '' aromaticity '' of the compounds, at any rate modulated by substituent groups on the aromatic moiety, even if the adsorbates show a common planar disposition on the surface in the adsorbed state. The interfacial activity can be successfully related to the process of formation of a ''soft-soft'' couple (in the Pearson's concept) between mercury and the organic, in competition with the 'hard-soft'' couple between the metal and water. Desorption is then explained with a higher 'hard'' character of mercury at increasing negative potential. In this view, the feasibility of a partial charge transfer, as expressed by lambda, calculated for neutral organic adsorbates, corresponding to a positive DELTAN value (DELTAN, fractional number of electrons transferred from the adsorbate to the mercury) can be confirmed. A simple relation between adsorbability and ''bulkyness'' of the compounds, in relation to the dislodgement of water molecules from the surface occurring in the adsorption process is proposed and discussed
Aromaticity, electronic structure and molecular dimension in the adsorption of organic compounds on mercury - II. Intermolecular interactions among adsorbed molecules
No full textThe Frumkin interaction parameter between aromatic molecules (neutral form) adsorbed from aqueous solution on mercury electrode, is related to the balance of energy dispersion terms (adsorbate-adsorbate) and water-water molecular interaction reflecting the role played by substitution on the electrode surface of water by the aromatic molecule. The interaction among adsorbed aromatics (in neutral form) is always attractive, so that the sign of αF (Frumkin parameter, positive or negative) arises from that kind of balance. For aromatic anions, taking into account a large partial charge transfer from the adsorbate to the metal surface, the change of ΔGADS0 at varying the coverage (θ) is mainly due to electrostatic repulsion among charge adsorbed particles. © 1997 Elsevier Science Ltd. All rights reserved
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