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Los anillos moleculares de Borromeo son un … Los anillos moleculares de Borromeo son un ejemplo de arquitectura molecular mecánicamente entrelazada en la que tres macrociclos están entrelazados de tal manera que la ruptura de cualquier macrociclo permite a los otros disociarse. Son los ejemplos más pequeños de nudo de Borromeo. La síntesis de los anillos moleculares de Borromeo fue publicada en 2004 por el grupo de J. Fraser Stoddart. El compuesto llamado borromeato se compone de tres macrociclos interpenetrados y se forma a partir de la reacción entre 2,6-diformilpiridina y compuestos diamino, formando un complejo con zinc.s diamino, formando un complejo con zinc.
, Os anéis moleculares borromeanos são um ex … Os anéis moleculares borromeanos são um exemplo de uma na qual três macrociclos são intertravados de tal maneira que quebrar qualquer macrociclo permite que os outros se desassociem. Eles são os menores exemplos de anéis borromeanos. A síntese dos anéis moleculares borromeanos foi relatada em 2004 pelo grupo de J. Fraser Stoddart. O chamado Borromeato é composto por três macrociclos interpenetrados formados a partir da reação entre os compostos 2,6- e diamina, complexados com zinco.tos 2,6- e diamina, complexados com zinco.
, Молекулярные кольца Борромео — реализация … Молекулярные кольца Борромео — реализация колец Борромео в виде молекулярного соединения. Состоит из трёх сцепленных циклических молекул, разрушение каждой из которых приводит к разъединению двух других. В 1997 году биолог Ченде Мао (Chengde Mao) с соавторами из Нью-Йоркского университета успешно сконструировали кольца из ДНК. В 2003 году химик Фрейзер Стоддарт с соавторами из Калифорнийского университета, использовали комплексные соединения для построения набора колец из 18 компонентов за одну операцию. колец из 18 компонентов за одну операцию.
, 분자 보로메오 고리(영어: molecular Borromean rings)는 거대고리 3개가 보로메오 고리 형태를 이룬 기계적으로 맞물린 분자 구조(mechanically interlocked molecular architecture)이다.
, In chemistry, molecular Borromean rings ar … In chemistry, molecular Borromean rings are an example of a mechanically-interlocked molecular architecture in which three macrocycles are interlocked in such a way that breaking any macrocycle allows the others to dissociate. They are the smallest examples of Borromean rings. The synthesis of molecular Borromean rings was reported in 2004 by the group of J. Fraser Stoddart. The so-called Borromeate is made up of three interpenetrated macrocycles formed through templated self assembly as complexes of zinc. The synthesis of the macrocyclic systems involves self-assembles of two organic building blocks: 2,6-diformylpyridine (an aromatic compound with two aldehyde groups positioned ortho to the nitrogen atom of the pyridine ring) and a symmetric diamine containing a meta-substituted 2,2'-bipyridine group. Zinc acetate is added as the template for the reaction, resulting in one zinc cation in each of the six pentacoordinate complexation sites. Trifluoroacetic acid (TFA) is added to catalyse the imine bond-forming reactions. The preparation of the tri-ring Borromeate involves a total of 18 precursor molecules and is only possible because the building blocks self-assemble through 12 aromatic pi-pi interactions and 30 zinc to nitrogen dative bonds. Because of these interactions, the Borromeate is thermodynamically the most stable reaction product out of potentially many others. As a consequence of all the reactions taking place being equilibria, the Borromeate is the predominant reaction product. Reduction with sodium borohydride in ethanol affords the neutral Borromeand. With the zinc removed, the three macrocycles are no longer chemically bonded but remain "mechanically entangled in such a way that that if only one of the rings is removed the other two can part company." The Borromeand is thus a true Borromean system as cleavage of just one imine bond (to an amine and an acetal) in this structure breaks the mechanical bond between the three constituent macrocycles, releasing the other two individual rings. A borromeand differs from a [3]catenane in that none of its three macrocycles is concatenated with another other; if one bond in a [3]catenane is broken and a cycle removed, a [2]catenane remains. Organic synthesis of this seemingly complex compound is in reality fairly simple; for this reason, the Stoddart group has suggested it as a gram-scale laboratory activity for undergraduate organic chemistry courses.r undergraduate organic chemistry courses.
, Gli anelli di Borromeo molecolari sono ese … Gli anelli di Borromeo molecolari sono esempi di molecole meccanicamente interconnesse nei quali tre macrocicli sono legati in maniera che rompendone uno qualsiasi si permette ai restanti di dissociarsi. È ritenuto il più piccolo esempio d'. La loro sintesi è stata riportata per la prima volta nel 2004 dal gruppo J. Fraser Stoddart. È conosciuto come borromeato il composto di tre macrocicli interpenetrati formati dalla reazione tra 2,6-diformilpiridina composti , complessato con ioni zinco. L'anello di Borromeo nella forma più schematica è stato proposto come logo dell'Unione Matematica Internazionale (IMU) nel 2006 al congresso di Madrid.ale (IMU) nel 2006 al congresso di Madrid.
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Молекулярные кольца Борромео — реализация … Молекулярные кольца Борромео — реализация колец Борромео в виде молекулярного соединения. Состоит из трёх сцепленных циклических молекул, разрушение каждой из которых приводит к разъединению двух других. В 1997 году биолог Ченде Мао (Chengde Mao) с соавторами из Нью-Йоркского университета успешно сконструировали кольца из ДНК. В 2003 году химик Фрейзер Стоддарт с соавторами из Калифорнийского университета, использовали комплексные соединения для построения набора колец из 18 компонентов за одну операцию. колец из 18 компонентов за одну операцию.
, 분자 보로메오 고리(영어: molecular Borromean rings)는 거대고리 3개가 보로메오 고리 형태를 이룬 기계적으로 맞물린 분자 구조(mechanically interlocked molecular architecture)이다.
, Los anillos moleculares de Borromeo son un … Los anillos moleculares de Borromeo son un ejemplo de arquitectura molecular mecánicamente entrelazada en la que tres macrociclos están entrelazados de tal manera que la ruptura de cualquier macrociclo permite a los otros disociarse. Son los ejemplos más pequeños de nudo de Borromeo. La síntesis de los anillos moleculares de Borromeo fue publicada en 2004 por el grupo de J. Fraser Stoddart. El compuesto llamado borromeato se compone de tres macrociclos interpenetrados y se forma a partir de la reacción entre 2,6-diformilpiridina y compuestos diamino, formando un complejo con zinc.s diamino, formando un complejo con zinc.
, In chemistry, molecular Borromean rings ar … In chemistry, molecular Borromean rings are an example of a mechanically-interlocked molecular architecture in which three macrocycles are interlocked in such a way that breaking any macrocycle allows the others to dissociate. They are the smallest examples of Borromean rings. The synthesis of molecular Borromean rings was reported in 2004 by the group of J. Fraser Stoddart. The so-called Borromeate is made up of three interpenetrated macrocycles formed through templated self assembly as complexes of zinc.plated self assembly as complexes of zinc.
, Gli anelli di Borromeo molecolari sono ese … Gli anelli di Borromeo molecolari sono esempi di molecole meccanicamente interconnesse nei quali tre macrocicli sono legati in maniera che rompendone uno qualsiasi si permette ai restanti di dissociarsi. È ritenuto il più piccolo esempio d'. La loro sintesi è stata riportata per la prima volta nel 2004 dal gruppo J. Fraser Stoddart. È conosciuto come borromeato il composto di tre macrocicli interpenetrati formati dalla reazione tra 2,6-diformilpiridina composti , complessato con ioni zinco.ina composti , complessato con ioni zinco.
, Os anéis moleculares borromeanos são um ex … Os anéis moleculares borromeanos são um exemplo de uma na qual três macrociclos são intertravados de tal maneira que quebrar qualquer macrociclo permite que os outros se desassociem. Eles são os menores exemplos de anéis borromeanos. A síntese dos anéis moleculares borromeanos foi relatada em 2004 pelo grupo de J. Fraser Stoddart. O chamado Borromeato é composto por três macrociclos interpenetrados formados a partir da reação entre os compostos 2,6- e diamina, complexados com zinco.tos 2,6- e diamina, complexados com zinco.
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Anéis moleculares borromeanos
, Молекулярные кольца Борромео
, Molecular Borromean rings
, Anelli di Borromeo molecolari
, Anillos moleculares de Borromeo
, 분자 보로메오 고리
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