974 resultados para 9,10-Dimetil-1,2-benzantraceno


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pt. 1. January 19, 20, 23, February 21-23, 29, March 1, 6-10, 1956. 1225 p.--pt. 2. June 4-6, 12, 21, 1956. pp. 1227-1533.

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O objeto de pesquisa desta dissertação são as perícopes de Isaías 7,10-17;8,23-9,6 e 11,1-9. Nelas encontra-se o cerne do pensamento messiânico de Isaías. É importante salientar que o messianismo isaiano parte da concepção de um messias que vem para governar a partir do direito e da justiça, e, assim, estabelecer a paz. O messianismo apresentado por este profeta não parte das esferas de poder da corte, mas dos pequenos e frágeis da sociedade, dotados do espírito de Javé. Há que se destacar que a profecia de Isaías é um divisor de águas no que concerne à teologia messiânica no Reino do Sul, especialmente nos profetas depois dele. Em Isaías, encontra-se a ruptura com as classes dominantes e com um messianismo bélico. A proposta deste profeta aponta para um messias frágil, mas que é movido pelo sopro, pelo movimento de Javé em suas ações. E assim, Isaías abre as portas para compreensão de um messias pobre, como retrata Zacarias, um messias servo, apresentado pelo Dêutero-Isaías, ou quem sabe um messias pastor, como proposto por Miquéias e Ezequiel e bem recebido pelas tradições do primeiro século (Jo 10,10). O messias em Isaías tem nomes e adjetivos : Imanuel, menino, raiz de Jessé, mas não tem rosto, não tem localização geográfica, não se enquadra em nenhum tipo messiânico desde o davidismo de Jerusalém. Este messias pode ser encontrado em qualquer época com qualquer rosto, por isso a importante releitura messiânica apresentada em textos do cristianismo nascente. Muitos deles inspirados na profecia isaiana do 8º. século a.C.

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In the structure of the 1:1 proton-transfer compound of 1,10-phenanthroline with 4,5-dichlorophthalic acid, C12H9N2+ C8H3Cl2O4-, determined at 130 K, the 1,10-phenanthroline cation and the hydrogen 4,5-dichlorophthalate anion associate through a single N-H...O(carboxyl) hydrogen bond giving discrete units which have no extension except through a number of weak cation C-H...O(anion) associations and weak cation--anion aromatic ring pi-pi interactions [minimum centroid separation, 3.6815(12)A]. The anions are essentially planar [maximum deviation 0.214(1)A (a carboxyl O)] with the syn-related H atom of the carboxyl group forming a short intramolecular O-H...O(carboxyl) hydrogen bond.

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In the structure of CH6N3+ C6H6AsO3- . CH5N3 . 2H2O, the phenylarsonate anion gives two R2/2(8) cyclic hydrogen-bonding interactions, one with a guanidinium cation, the other with a guanidine molecule. The anions are also bridged by the water molecules, one of which completes a cyclic R3/5(9) hydrogen-bonding association with the guanidinum cation, conjoint with one of the three R^2^~2~(8) associations about that ion, as well as forming an R1/2(6) cyclic association with the guanidine molecule. The result is a three-dimensional framework structure.

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Stimulated by the efficacy of copper (I) catalysed Huisgen-type 1,3-dipolar cycloaddition of terminal alkynes and organic azides to generate 1,4-disubstituted 1,2,3-triazole derivatives, the importance of ‘click’ chemistry in the synthesis of organic and biological molecular systems is ever increasing.[1] The mild reaction conditions have also led to this reaction gaining favour in the construction of interlocked molecular architectures.[2-4] In the majority of cases however, the triazole group simply serves as a covalent linkage with no function in the resulting organic molecular framework. More recently a renewed interest has been shown in the transition metal coordination chemistry of triazole ligands.[3, 5, 6] In addition novel aryl macrocyclic and acyclic triazole based oligomers have been shown to recognise halide anions via cooperative triazole C5-H….anion hydrogen bonds.[7] In light of this it is surprising the potential anion binding affinity of the positively charged triazolium motif has not, with one notable exception,[8] been investigated. With the objective of manipulating the unique topological cavities of mechanically bonded molecules for anion recognition purposes, we have developed general methods of using anions to template the formation of interpenetrated and interlocked structures.[9-13] Herein we report the first examples of exploiting the 1,2,3-triazolium group in the anion templated formation of pseudorotaxane and rotaxane assemblies. In an unprecedented discovery the bromide anion is shown to be a superior templating reagent to chloride in the synthesis of a novel triazolium axle containing [2]rotaxane. Furthermore the resulting rotaxane interlocked host system exhibits the rare selectivity preference for bromide over chloride...