dor_id: 54136
506.#.#.a: Público
590.#.#.d: Los artículos enviados a la revista "Educación Química", se juzgan por medio de un proceso de revisión por pares
510.0.#.a: Bibliografía latinoamericana (Biblat); Coordinación de la formación del personal de nivel superior (CAPES); Consejo Nacional de Ciencia y Tecnología (CONACyT); Dialnet; Sistema Regional de Información en Línea para Revistas Científicas de América Latina, el Caribe, España y Portugal (Latindex); Matriz De Información de Análisis de Revistas (MIAR); PERIODICA; Scientific Electronic Library Online (SciELO); A Division of the American Chemical Society (CAS); Scimago Journal & Country Rank; Scopus; European Reference index for the Humanities and Social Sciences (ERIHPLUS)
561.#.#.u: https://quimica.unam.mx/
650.#.4.x: Biología y Química
336.#.#.b: article
336.#.#.3: Artículo de Investigación
336.#.#.a: Artículo
351.#.#.6: https://www.revistas.unam.mx/index.php/req
351.#.#.b: Educación Química
351.#.#.a: Artículos
harvesting_group: RevistasUNAM
270.1.#.p: Revistas UNAM. Dirección General de Publicaciones y Fomento Editorial, UNAM en revistas@unam.mx
590.#.#.c: Open Journal Systems (OJS)
270.#.#.d: MX
270.1.#.d: México
590.#.#.b: Concentrador
883.#.#.u: https://revistas.unam.mx/catalogo/
883.#.#.a: Revistas UNAM
590.#.#.a: Coordinación de Difusión Cultural
883.#.#.1: https://www.publicaciones.unam.mx/
883.#.#.q: Dirección General de Publicaciones y Fomento Editorial
850.#.#.a: Universidad Nacional Autónoma de México
856.4.0.u: https://www.revistas.unam.mx/index.php/req/article/view/52948/47097
100.1.#.a: Blacque, Olivier; Berke, Heinz
524.#.#.a: Blacque, Olivier, et al. (2015). Spontaneously resolving chiral cis-[dinitrobis(ethylenediamine)cobalt]X complexes (X = Cl, Br) from the Alfred Werner collection of original samples at the University of Zurich --- Alfred Werner’s missed opportunity to become the ‘Louis Pasteur’ of coordi. Educación Química; Vol. 26 Núm. 4, 2015; 330 - 345. Recuperado de https://repositorio.unam.mx/contenidos/54136
245.1.0.a: Spontaneously resolving chiral cis-[dinitrobis(ethylenediamine)cobalt]X complexes (X = Cl, Br) from the Alfred Werner collection of original samples at the University of Zurich --- Alfred Werner’s missed opportunity to become the ‘Louis Pasteur’ of coordi
502.#.#.c: Universidad Nacional Autónoma de México
561.1.#.a: Facultad de Química, UNAM
264.#.0.c: 2015
264.#.1.c: 2015-11-04
653.#.#.a: Alfred Wegner; Compuestos de coordinación; Quiralidad; Resolución de conglomerado; Resolución quiral espontánea; Twinning sintético; Sales de [dinitrobis- (etilendiamina)cobalto]
506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-ND 4.0 Internacional, https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico educquim@unam.mx
884.#.#.k: https://www.revistas.unam.mx/index.php/req/article/view/52948
001.#.#.#: 047.oai:ojs.pkp.sfu.ca:article/52948
041.#.7.h: spa
520.3.#.a: 17 original crystals of [ -dinitrobis(ethylenediamine)cobalt]X complexes from the Alfred Werner collection of original samples of the University of Zurich were studied by single crystal X-ray diffraction revealing that the complexes with X = Cl, Br can undergo spontaneous chiral resolution upon crystallization. The main focus of this article was the chiral [ - and -dinitrobis(ethylenediamine)cobalt]Cl complexes, which crystallize from racemic solution in the space group P 21 mainly as synthetical twins enriched in one enantiomer, but to a small extent also as pure enantiomorphs. The twinning effect was recognized and correctly described by PhD student Richard Hessen of the Alfred Werner group (PhD thesis 1914). Richard Hessen eventually resolved the [ - and -dinitrobis(ethylenediamine)cobalt]Cl complex by the conglomerate salt resolution method. Based on the availability of the pure [ - or -dinitrobis(ethylenediamine)cobalt]Cl complex, he carried out seeding experiments, which proved that the [ - and -dinitrobis(ethylenediamine)cobalt]Cl complexes can be enriched to a great extent in one enantiomer by spontaneous chiral resolution. Already in the period of time from 1900 to 1904, various PhD students of Alfred Werner’s group (Adolf Grün, Edith Humphrey, Ernst Zinggeler, Heinrich Schwarz, and Paul Larisch) prepared the [ - or -dinitrobis(ethylenediamine)cobalt]Cl complex. Adolf Grün and Edith Humphrey have prepared enantiomerically enriched and rarely also enantiomorphic crystals of the [ - or -dinitrobis(ethylenediamine)cobalt]Cl complex and could have separated crystals by manual crystal picking. Admittedly due to the crystal habits this would have been a difficult endeavour, but this ‘Louis Pasteur method’ was apparently not taken into consideration. Still in a cautiously sounding note one could state that Alfred Werner and his group had missed by this omission the opportunity for spontaneous chiral resolution of the [ - and -dinitrobis(ethylenediamine)cobalt]Cl complexes in the period of time from 1900 to 1904. In addition, making this early chiral resolution story even more incredible, we found that Heinrich Schwarz and Paul Larisch applied in these early days of coordination chemistry the S-(D-,d-)camphorsulfonate anion to achieve the separation of the cis- and trans-isomers of the [dinitrobis(ethylenediamine)cobalt] complexes. They did not approach the potentially possible chiral resolution of the [cis-dinitrobis(ethylenediamine)cobalt]+ cation. But based on their syn- thetic procedure they did indeed accomplish chiral resolution of the cis-isomer and prepared eventually a series of the chiral [cis-, -dinitrobis(ethylenediamine)cobalt]X salts; however all this was in an unintentional manner.
773.1.#.t: Educación Química; Vol. 26 Núm. 4 (2015); 330 - 345
773.1.#.o: https://www.revistas.unam.mx/index.php/req
022.#.#.a: ISSN electrónico: 1870-8404; ISSN impreso: 0187-893X
310.#.#.a: Trimestral
300.#.#.a: Páginas: 330-345
264.#.1.b: Facultad de Química, UNAM
doi: https://doi.org/10.1016/j.eq.2015.06.002
handle: 5e68c5e0e1aa6288
harvesting_date: 2023-06-20 16:00:00.0
856.#.0.q: application/pdf
last_modified: 2023-06-20 16:00:00
license_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode.es
license_type: by-nc-nd
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