Although I am not supposed to be an impartial judge, let me begin by stating that I think this Conference has been very successful. We had two very good poster sessions, St. Peter answered quite positively to our prayers for good weather and, above all, there were four fine and authoritative plenary lectures, that covered most of the fields of interest of the participants.

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The thermodynamic properties of mixtures of liquids have interested chemists for many years. An enormous amount of experimental information has been amassed, and a great deal of effort has been devoted to developing theories which seek to account for the observed behaviour of such mixtures. These theories have more than academic interest and importance, for the better our understanding of liquid mixtures, the better are the chances of successfully predicting the properties of a particular mixture. Reliable predictions of this kind may have considerable technological value.

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Um estudo experimental recente da equação de estado do etileno líquido comprimido, numa grande gama de pressões e temperaturas, constitui um bom campo de ensaio de vários modelos de potencial intermolecular para aquela molécula. Com este objectivo, desenvolveu-se uma função potencial que inclui, além do usual termo Lennard-Jones (n,6) esfericamente simétrico, contribuiçies de forças multipolares (electrostáticas), de dispersão anisotrópica, de sobreposição de carga anisotrópica (efeito de forma) e de indução.

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Nas últimas décadas intensificou-se de maneira extraordinária a pesquisa de princípios dotados de actividade farmacológica provenientes de plantas de origem tropical, capazes de explicar as acções terapêuticas que as populações autóctones lhes atribuem [1].

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O coiñecemento da química do talio(III) ten avantado moito [1] dende que, hai vinte anos, COTTON [2] conqueríu estabilizar por vez primeira compostos de fórmula xeral TlX3 .nD. Nembargantes non é moita a información estrutural que se ten distes compostos e tampouco e moito o que se sabe sobor da estabilización de compostos de fórmula xeral TlXXZ.nD.

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One of the persisting problems in organic synthesis is to develop new and better methods for effecting a C-C bond connection. Simple as it may seem, it remains, even today, a challenge in terms of regiospecificity, enantioselection and chemical yield when applied to synthesis of complex organic molecules.

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