Zobrazeno 1 - 10
of 238
pro vyhledávání: '"Flack parameter"'
Autor:
David John Watkin, Richard Ian Cooper
Publikováno v:
Chemistry, Vol 2, Iss 4, Pp 796-804 (2020)
The Flack Parameter is now almost universally reported for all chiral materials characterized by X-ray crystallography. Its elegant simplicity was an inspired development by Howard Flack, and although the original algorithm for its computation has be
Externí odkaz:
https://doaj.org/article/53dc9d334c8d4761aa784b851ebc4743
Publikováno v:
Chemistry, Vol 2, Iss 3, Pp 759-776 (2020)
Chiral compounds have played an important role in the development of coordination chemistry. Unlike organic chemistry, where mechanistic rules allowed the establishment of absolute configurations for numerous compounds once a single absolute determin
Externí odkaz:
https://doaj.org/article/dce6b08d2a2e48ff87ed7b24a3e35035
Autor:
Aldo Guillermo Amaro Hernández, Tomasa Rodríguez Tzompantzi, Álvaro Dávila García, Rosa Luisa Meza-León, Sylvain Bernès
Publikováno v:
IUCrData, Vol 5, Iss 6, p x200788 (2020)
The title compound, C22H33NO12·CHCl3, was obtained as a product of a double aza-Michael addition of hydroxylamine on a Chiron with a known absolute configuration. The enantiopure compound crystallized as a chloroform solvate, in space group P1, and
Externí odkaz:
https://doaj.org/article/0fd52f75234d4372a1d1472839dba6c3
Autor:
Leonardo Y. Fox-Uribe, Javier Hernández-Paredes, Yedith Soberanes, Ignacio Valenzuela-Chavira, Karina D. Garcia-Orozco, Adrian Ochoa-Leyva, Karen Ochoa Lara, Rosa Elena Navarro, Rogerio R. Sotelo-Mundo
Publikováno v:
IUCrData, Vol 4, Iss 4, p x190458 (2019)
The absolute structure of d-glutamic acid hydrochloride [systematic name: (R)-1,3-dicarboxypropan-1-aminium chloride], C5H10NO4+·Cl−, has been determined by single-crystal X-ray diffraction at room temperature using Cu Kα radiation.
Externí odkaz:
https://doaj.org/article/e469a0292a0f4509aa1ac8ebf6a1ea15
Publikováno v:
European Journal of Chemistry. 12:52-55
Since street drugs are frequently and rapidly modified, in order to circumvent the current laws that make them illicit, it is necessary to fully identify them by single crystal X-ray diffraction; subsequently, ideal powder patterns are computed for r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::afd571d339adc636bd656e79ad907d82
https://doi.org/10.5155/eurjchem.12.1.52-55.2077
https://doi.org/10.5155/eurjchem.12.1.52-55.2077
Publikováno v:
Inorganic Chemistry. 60:5014-5020
Novel trispirocyclotriphosphazenes with oxaphosphorine rings (DOP-PZs) were successfully synthesized by an Appel reaction with phosphoramide, which was prepared from ammonia and 10-chloro-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide derived fro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4936c906451f4bb607380b1f15158025
https://doi.org/10.1021/acs.inorgchem.1c00054
https://doi.org/10.1021/acs.inorgchem.1c00054
Autor:
Tadao Nishiayama, Ginga Kitahara, Akihiko Nakatsuka, Makoto Tokuda, Kohei Unoki, Akira Yoshiasa, Kazumasa Sugiyama
Publikováno v:
Acta Crystallographica Section C Structural Chemistry. 77:169-175
Single crystals of Ni3Se2 (trinickel diselenide) and NiSe (nickel selenide) with stoichiometric chemical compositions were grown in evacuated silica-glass tubes. The chemical compositions of the single crystals of Ni3Se2 and NiSe were determined by s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d9507b4f8a1806e96bbc1635ce57bde
https://doi.org/10.1107/s2053229621002187
https://doi.org/10.1107/s2053229621002187
Autor:
Gunter Heymann, Martina Tribus, Stefan G. Ebbinghaus, Toni Buttlar, Oliver Janka, Elisabeth Selb
Publikováno v:
Journal of Materials Chemistry C. 9:5486-5496
By high-pressure/high-temperature multianvil synthesis a new high-pressure (HP) phase of Co3TeO6 was obtained. The compound crystallizes in the acentric trigonal crystal system of the Ni3TeO6-type structure with space group R3 and the following unit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c35806fe9fc6da634f860d99ff897fc5
https://doi.org/10.1039/d0tc05210h
https://doi.org/10.1039/d0tc05210h
Publikováno v:
European Journal of Chemistry. 11:314-318
We are evaluating the proposition that compounds with pronounced tendencies to crystallize as kryptoracemates contain molecular fragments responsible for such a property. Why Sohncke space groups display such a tendency is not currently known, but on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91c13412aac8ff3725e930df4fd5f959
https://doi.org/10.5155/eurjchem.11.4.314-318.2022
https://doi.org/10.5155/eurjchem.11.4.314-318.2022
Autor:
Evana Halaka, Yashiro Rojas, Roger A. Lalancette, Mary Hanna, Ivan Bernal, Alex Sidotu, Mina Mikhael, Jehan Joma
Publikováno v:
Advances in Chemical Research. 2:1-8
The compound, [cis-dichloro-(tris-2-amino(ethylamine))cobalt(III)]chloride hydrate, [cis-Cl2-(tren)Co(III)Cl]·H2O, a conglomerate crystallizing in P21 with Z = 4 (Z’ = 2), has been used as a precursor in the synthesis of a new dicobalt(III) peroxo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee2d55f53e9e143be590e6479e0c1ef8
https://doi.org/10.21926/acr.2003008
https://doi.org/10.21926/acr.2003008