Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Fred H. Greenberg"'
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 7, Pp 947-950 (2016)
In the title compound, C34H28O4, the cyclohexadiene ring has a screw-boat conformation with a torsion angle between the double bonds being on average ca 15° [15.2 (3) and −15.3 (3) in the two independent molecules]. All four phenyl rings in both m
Externí odkaz:
https://doaj.org/article/c7ebc028e6e04cf18ff9d9e0215fa4cd
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 7, Pp 1054-1059 (2016)
The title compound, C15H11NO4, crystallizes in two polymorphic forms, centrosymmetric monoclinic and chiral orthorhombic. The geometry of the molecules in the two polymorphs is slightly different, possibly due to intermolecular interactions. There ar
Externí odkaz:
https://doaj.org/article/1772f7e0d6ba427e812ba4732d910a63
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications, Vol 71, Iss 7, Pp o487-o488 (2015)
The title molecule, C26H16O2, crystallizes as a molecular crystal with no strong intermolecular interactions (the shortest C—H...O contact is longer than 3.4 Å). Two flat acenaphthylene groups of neigboring 1,2-dibenzoylacenaphthylene molecules ar
Externí odkaz:
https://doaj.org/article/9d1bf1b736e14effac5d22a98d89e8d8
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications
Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 7, Pp 947-950 (2016)
Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 7, Pp 947-950 (2016)
In the title compound, C34H28O4, the cyclohexadiene ring has a screw-boat conformation. All four phenyl rings in the two independent molecules are arranged in a propeller-like conformation. The two molecules exhibit S,R- and R,S- chirality an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bc03efc84602e5c98d8c325d3ebb265
https://pubmed.ncbi.nlm.nih.gov/27555937
https://pubmed.ncbi.nlm.nih.gov/27555937
Publikováno v:
Acta Crystallographica Section E: Crystallographic Communications
Acta Crystallographica Section E: Crystallographic Communications, Vol 71, Iss 7, Pp o487-o488 (2015)
Acta Crystallographica Section E: Crystallographic Communications, Vol 71, Iss 7, Pp o487-o488 (2015)
The title molecule, C26H16O2, crystallizes as a molecular crystal with no strong intermolecular interactions (the shortest C—H...O contact is longer than 3.4 Å). Two flat acenaphthylene groups of neigboring 1,2-dibenzoylacenaphthylene molecules ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::339c850e815c244da54e2f23aa30e6b3
https://pubmed.ncbi.nlm.nih.gov/26279922
https://pubmed.ncbi.nlm.nih.gov/26279922
Autor:
Fred H. Greenberg
Publikováno v:
Journal of Chemical Education. 77:505
An experiment for the sophomore organic course is described in which dibenzoylethylene is treated with hydriodic acid in acetone at room temperature to obtain dibenzoylethane rather than the expected dibenzoyliodoethane. Advantages are a short reacti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fd63c0f89ab5e64a61eb9f3af84b654
https://doi.org/10.1021/ed077p505
https://doi.org/10.1021/ed077p505
Autor:
Fred H. Greenberg
Publikováno v:
Journal of Chemical Education. 73:1043
The synthetic sequence involving the oxidation of fluorene to fluorenone and the reduction of fluorenone to fluorenol can be extended by preparing the title compounds via the intermediate 9-chlorofluorene. The latter is obtained by heating fluorenol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7189b56d93f1a72d3c166494218deb3
https://doi.org/10.1021/ed073p1043
https://doi.org/10.1021/ed073p1043
Autor:
Fred H. Greenberg
Publikováno v:
Journal of Chemical Education. 69:654
A demonstration of solubility by comparing gasoline additives containing methanol and isopropyl alcohol.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f35530ae3e4db424e96d7ad81fc6cb71
https://doi.org/10.1021/ed069p654
https://doi.org/10.1021/ed069p654
Autor:
Fred H. Greenberg
Publikováno v:
Journal of Chemical Education. 69:320
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16d54fadff9b6fd6f3583f949a77f4fa
https://doi.org/10.1021/ed069p320
https://doi.org/10.1021/ed069p320
Autor:
Fred H. Greenberg
Publikováno v:
Journal of Chemical Education. 67:611
Illustrates charge delocalization of an ambident anion in an SN2 reaction, the comparative deshielding of oxygen and nitrogen in proton NMR, and the use of the NMR integral in assessing isomer distribution.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcee9565ed0cbe037101eaf0e248b2e3
https://doi.org/10.1021/ed067p611
https://doi.org/10.1021/ed067p611