{"id":27225,"date":"2003-01-12T00:00:00","date_gmt":"2003-01-12T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sa%c2%adntesi-caracterizacio-i-reactivitat-de-complexos-de-pdii-ptii-i-rhi-amb-lligands-piraza%c2%b2lics-n1-substitua%c2%afts-amb-grups-alcohol-a%c2%a8ter-i-polia%c2%a8ter\/"},"modified":"2003-01-12T00:00:00","modified_gmt":"2003-01-12T00:00:00","slug":"sa%c2%adntesi-caracterizacio-i-reactivitat-de-complexos-de-pdii-ptii-i-rhi-amb-lligands-piraza%c2%b2lics-n1-substitua%c2%afts-amb-grups-alcohol-a%c2%a8ter-i-polia%c2%a8ter","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sa%c2%adntesi-caracterizacio-i-reactivitat-de-complexos-de-pdii-ptii-i-rhi-amb-lligands-piraza%c2%b2lics-n1-substitua%c2%afts-amb-grups-alcohol-a%c2%a8ter-i-polia%c2%a8ter\/","title":{"rendered":"S\u00edntesi, caracterizaci\u00f3 i reactivitat de complexos de pd(ii), pt(ii) i rh(i) amb lligands piraz\u00f3lics n1-substitu\u00c1\u00afts amb grups alcohol, \u00e9ter i poli\u00e9ter"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Anna Boixassa Mallarach <\/strong><\/h2>\n<p>En esta tesis doctoral se pretende estudiar, de forma general, la coordinaci\u00f3n de ligandos piraz\u00f3licos 3,5 y n1-sustituidos a pd(ii), pt(ii) y rh(i).  el trabajo est\u00e1 dividido en dos apartados.  el primer apartado se basa en la preparaci\u00f3n de ligandos piraz\u00f3licos sustituidos en posici\u00f3n 3 i 5 con h o metilos y en posici\u00f3n n1 con grupos alcohol (todos ellos descritos en la bibliograf\u00eda). La reactividad de estos ligandos (l) con clorocomplejos de pd(ii) da lugar a complejos trans-[pdcl2(l)2]. La caracterizaci\u00f3n de estos complejos por rmn muestra una duplicidad de se\u00f1ales debida a la presencia de dos is\u00f3meros en soluci\u00f3n, como consecuencia de la rotaci\u00f3 impedida alrededor del enlace pd-n: syn y anti. Para poder estudiar mejor la formaci\u00f3n de los dos is\u00f3meros se sintetizan, por primera vez en este trabajo, ligandos 3,5-dimetilpiraz\u00f3licos n1-sustituidos con cadenas de poli\u00e9ter. Se observa que la formaci\u00f3n del is\u00f3mero anti, el menos impedido est\u00e9ricamente, aumenta a medida que la cadena de poli\u00e9ter se alarga.  se demuestra as\u00ed que el sustituyente en posicion n1 es responsable de esta rotaci\u00f3n impedida.  un segundo estudio que pretende ser equivalente con lo ligandos pirazol-alcohol con pt(ii) da lugar a la formaci\u00f3n de mezclas de is\u00f3meros cis y trans, la proporci\u00f3n de los cuales depende del producto de pt(ii) de partida y de las condiciones de reacci\u00f3n.  el segundo apartado se basa en el estudio de la coordinaci\u00f3n del ligando bis[2-(3,5-dimetil-1-pirazolil)etil]\u00e9ter (descrito en la bibliograf\u00eda) a pd(ii), pt(ii) y rh(i). Con los metales pd(ii) y pt(ii), el ligando act\u00faa en todos los casos como bidentado k2n,n.  cuando coordina a rh(i) se observa la formaci\u00f3n de complejos donde el ligando coordina con los modos k2n,n o k3n,o,n (dependiendo de las condiciones est\u00e9ricas o electr\u00f3nicas).  se describen tambi\u00e9n, en esta tesis, dos estructuras cristalinas: [pd(u-pz)(pzh)2]2(bf4)2(pzh=pirazol) y [rhl(cod)(h2o)<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>S\u00edntesi, caracterizaci\u00f3 i reactivitat de complexos de pd(ii), pt(ii) i rh(i) amb lligands piraz\u00f3lics n1-substitu\u00c1\u00afts amb grups alcohol, \u00e9ter i poli\u00e9ter<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 S\u00edntesi, caracterizaci\u00f3 i reactivitat de complexos de pd(ii), pt(ii) i rh(i) amb lligands piraz\u00f3lics n1-substitu\u00c1\u00afts amb grups alcohol, \u00e9ter i poli\u00e9ter <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Anna Boixassa Mallarach <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de barcelona<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 01\/12\/2003<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Josep Ros Badosa<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal:  Piniella febrer joan francesc <\/li>\n<li>clara Vi\u00f1as teixidor (vocal)<\/li>\n<li>teodor Parella coll (vocal)<\/li>\n<li>esther Delgado laita (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Anna Boixassa Mallarach En esta tesis doctoral se pretende estudiar, de forma general, la coordinaci\u00f3n de ligandos 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