{"id":25762,"date":"2018-03-09T09:17:16","date_gmt":"2018-03-09T09:17:16","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/sa%c2%adntesis-y-estudio-estructural-de-trisfosfazidas-y-trisiminofosforanos-macrobica%c2%adclicos-quirales\/"},"modified":"2018-03-09T09:17:16","modified_gmt":"2018-03-09T09:17:16","slug":"sa%c2%adntesis-y-estudio-estructural-de-trisfosfazidas-y-trisiminofosforanos-macrobica%c2%adclicos-quirales","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/murcia\/sa%c2%adntesis-y-estudio-estructural-de-trisfosfazidas-y-trisiminofosforanos-macrobica%c2%adclicos-quirales\/","title":{"rendered":"S\u00edntesis y estudio estructural de tris(fosfazidas) y tris(iminofosforanos) macrobic\u00edclicos quirales"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Jos\u00e9 Bern\u00e1 C\u00e1novas <\/strong><\/h2>\n<p>Se ha llevado a cabo la preparaci\u00f3n de un amplio n\u00famero de compuestos macrobic\u00edclicos quirales de simetr\u00eda c3 mediante el acoplamiento tripodal de diferentes tris(2-azidobencil)aminas con 1,1,1-tris(difenilfosfinometil)metanos. Se ha determinado que la cuaternizaci\u00f3n del \u00e1tomo de nitr\u00f3geno pivotal en forma de n-\u00f3xido, incrementa la estabilidad de los productos de reacci\u00f3n, mientras que la presencia de sustituyentes en posici\u00f3n orto a las agrupaciones pn3 o de grupos voluminosos en el carbono pivotal del fragmento tris(fosfina) la disminuyen. Las caracter\u00edsticas estructurales m\u00e1s relevantes de estas tris(fosfazidas) \u00aborto\u00bb son: su geometr\u00eda helicoidal, la orientaci\u00f3n out de los grupos unidos a sus \u00e1tomos cabeza de puente y la configuraci\u00f3n zzz de sus fragmentos fosfazida. Estas especies no evolucionaron a los tris(iminofosforanos) derivados de la extrusi\u00f3n de nitr\u00f3geno de sus agrupaciones fosfazida.  la reacci\u00f3n de tris(3-azidobencil)amina con 1,1,1-tris(difenilfosfinometil)etano, trifos, proporcion\u00f3 una nueva tris(fosfazida) que presenta diferencias notables, tanto en disoluci\u00f3n como en estado s\u00f3lido, con respecto a las tris(fosfazidas) \u00aborto\u00bb. Entre \u00e9stas destacan su mayor estabilidad en disoluci\u00f3n y su flexibilidad molecular, asociada a la isomerizaci\u00f3n e\/z de sus fragmentos pn3. Esta especie es capaz de evolucionar al correspondiente tris(iminofosforano) de simetr\u00eda c3 mediante la extrusi\u00f3n de nitr\u00f3geno no simult\u00e1nea de sus tres agrupaciones fosfazida. La introducci\u00f3n de sustituyentes sobre el fragmento de tribencilamina o sobre el carbono cabeza de puente permiti\u00f3 la preparaci\u00f3n de un amplio rango de tris(fosfazidas) y tris(iminofosforanos) \u00abmeta\u00bb. El an\u00e1lisis por difracci\u00f3n de rayos x de dos de los tris(iminofosforanos) sintetizados, uno con un metilo privotal y otro con un fenilo pivotal, permiti\u00f3 la determinaci\u00f3n de sus estructuras moleculares en estado s\u00f3lido. las reacciones de protonaci\u00f3n de al<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>S\u00edntesis y estudio estructural de tris(fosfazidas) y tris(iminofosforanos) macrobic\u00edclicos quirales<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 S\u00edntesis y estudio estructural de tris(fosfazidas) y tris(iminofosforanos) macrobic\u00edclicos quirales <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Jos\u00e9 Bern\u00e1 C\u00e1novas <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Murcia<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 25\/09\/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>Mateo Alajarin Ceron<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: carmen Pardo guitierrez del cid <\/li>\n<li>carmen N\u00e1jera domingo (vocal)<\/li>\n<li>rosa Mar\u00eda Claramunt vallesp\u00ed (vocal)<\/li>\n<li>joaquin Plumet ortega (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Jos\u00e9 Bern\u00e1 C\u00e1novas Se ha llevado a cabo la preparaci\u00f3n de un amplio n\u00famero de compuestos macrobic\u00edclicos [&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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