{"id":88569,"date":"2018-03-10T00:13:33","date_gmt":"2018-03-10T00:13:33","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sintesis-y-reactividad-de-ligandos-bis-difosfinometanuro-polisulfanos-y-poliselanos-en-complejos-carbonilicos-de-manganeso-i\/"},"modified":"2018-03-10T00:13:33","modified_gmt":"2018-03-10T00:13:33","slug":"sintesis-y-reactividad-de-ligandos-bis-difosfinometanuro-polisulfanos-y-poliselanos-en-complejos-carbonilicos-de-manganeso-i","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/quimica\/sintesis-y-reactividad-de-ligandos-bis-difosfinometanuro-polisulfanos-y-poliselanos-en-complejos-carbonilicos-de-manganeso-i\/","title":{"rendered":"Sintesis y reactividad de ligandos bis (difosfinometanuro) polisulfanos y poliselanos en complejos carbonilicos de manganeso (i)"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Mario Ceroni Galloso <\/strong><\/h2>\n<p>La presente tesis doctoral aborda la s\u00edntesis de complejos dinucleares de manganeso (i) y hierro (ii) conteniendo ligandos puente tetrafosfinobis (metanuro) polisulfanos y poliselanos, de f\u00f3rmula general ((co)4mn(pph2)2 c-en-c(pph2)2)mn(co)4) (e=s,se; n=1-7) y mer-((cnph)3ife((pph2)2c-sn-c(pph2)2)fei(cnph)3) (n=1-7), y el estudio de su reactividad en distintas vertientes.  la s\u00edntesis de estos compuestos se lleva a cabo mediante reacci\u00f3n de los complejos metanuro (mn(co)4((pph2)2ch)) y mer-(fei(cnph)3 ((pph2)2ch)) concilo-octaazufre y cilo-octaselenio u otros reactivos selenantes. Se propone un posible mecanismo para el proceso de degradaci\u00f3n nucleof\u00edlica del s8 por parte de estos complejos metanuro.  el estudio de la reactividad de los derivados policalc\u00f3geno abrca los siguientes aspectos:  1- acortamiento de la cadena policalc\u00f3geno mediante tratamiento con bases o reductores.  2- reacciones de protonaci\u00f3n parcial y total, controlada y reversible, de los dos \u00e1tomos de carbonometanuro del ligando puente ((pph2)2 c-en-c(pph2)2)2-.  3- rotura y fjormaci\u00f3nreversible de enlaces s-s y se-se en los complejos disulfano y diselano ((co)4mn ((pph2)2c-e2-c(pph2)2)mn (co)4) (e=s, se), mediante procesos redox o en procesos combinados redox y \u00e1cido-base. Ello conduce al mismo tiempo a la formaci\u00f3n de nuevos grupos funcionales sobre el \u00e1tomo de carbono central de la difosfina en los complejos mononucleares de f\u00f3rmula (mn(co)4((pph2)2c=e))+ y (mn (co)4((pph2)2c-e-x)) (e=s, se; x=br, i).  4- reactividad del complejo (mn(co)4((pph2)2c=s))+ en ataques tiof\u00edlicos confosfinas terciarias conformaci\u00f3n de iluro derivados del tipo (mn(co)4((pph2)2c-s-pr3))+, as\u00ed como estudio del proceso de oxidaci\u00f3nde dicha tiona con h2o2 para generar nuevos derivados sulfonato.  5- reactividad de los complejos de f\u00f3rmula (mn(co)4((pph2)2c-e-x)) (e=s,se; x=br,i) frente a agentes nucle\u00f3filos y electr\u00f3filos, lo que conduce de la formaci\u00f3n de nuevo<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Sintesis y reactividad de ligandos bis (difosfinometanuro) polisulfanos y poliselanos en complejos carbonilicos de manganeso (i)<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Sintesis y reactividad de ligandos bis (difosfinometanuro) polisulfanos y poliselanos en complejos carbonilicos de manganeso (i) <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Mario Ceroni Galloso <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Oviedo<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 25\/01\/2001<\/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>Victor Riera Gonz\u00e1lez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan Fornies gracia <\/li>\n<li> Miguel san Jos\u00e9 daniel (vocal)<\/li>\n<li>guillermo Muller jevenois (vocal)<\/li>\n<li> Garc\u00eda alonso Francisco Javier (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Mario Ceroni Galloso La presente tesis doctoral aborda la s\u00edntesis de complejos dinucleares de manganeso (i) y [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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