5690-48-2Relevant academic research and scientific papers
The synthesis and spectroscopic characterization of an aromatic uranium amidoxime complex
Bernstein, Karl J.,Do-Thanh, Chi-Linh,Penchoff, Deborah A.,Alan Cramer,Murdock, Christopher R.,Lu, Zheng,Harrison, Robert J.,Camden, Jon P.,Jenkins, David M.
, p. 374 - 379 (2014)
A tridentate aromatic amidoxime ligand and its corresponding uranyl complex have been synthesized. The complex was rigorously characterized with single-crystal X-ray diffraction, solid-state NMR, infrared absorption, and Raman spectroscopy. Unlike previous amidoxime complexes, the crystal structure confirms the complexation of only a single tridentate amidoxime ligand to the uranium, and solid state NMR confirms uranyl binding in the bulk sample. The Raman spectrum of the complex is dominated by the strong UO vibration which exhibits a significant shift from the UO vibration in unbound uranyl. Density functional theory (DFT) aided in calculations of vibrational modes as well as providing insight into the electronic structure of this uranyl complex.
1,3,5-Triazapentadienes by Nucleophilic Addition to 1,3- and 1,4-Dinitriles - Sterically Constrained Examples by Incorporation into Cyclic Peripheries: Synthesis, Aggregation, and Photophysical Properties
Wrobel, Agnes Johanna,Lucchesi, Ralph,Wibbeling, Birgit,Daniliuc, Constantin-Gabriel,Fr?hlich, Roland,Würthwein, Ernst-Ulrich
, p. 2849 - 2863 (2016/04/26)
1,3,5-Triazapentadienes usually show U- or twisted S-shaped conformations along the N-C-N-C-N skeleton due to dominating n/π? interactions. If, however, the 1,3,5-triazapentadiene unit is part of a ring, its W conformation might be restricted to the plane
Synthesis and crystallography of 8-halonaphthalene-1-carbonitriles and naphthalene-1,8-dicarbonitrile
Noland, Wayland E.,Narina, Venkata Srinivasarao,Britton, Doyle
experimental part, p. 694 - 697 (2012/03/11)
A convenient and high-yielding three-step synthesis of 8-halonaphthalene-1- carbonitriles has been achieved by ring opening of 1H-naphtho[1,8-de][1,2,3] triazine with the corresponding halides as the key step. Naphthalene-1,8- dicarbonitrile also has been synthesised from 8-bromonaphthalene-1-carbonitrile via palladium-catalysed cyanation of the aryl bromide. The crystal structures of 8-chloronaphthalene-1-carbonitrile, the A polymorph of the bromo analogue, and naphthalene-1,8-dicarbonitrile are isomorphous with orthorhombic symmetry. The B polymorph of the bromo compound and the iodo analogue are also isomorphous, but with monoclinic symmetry. In all of the halo carbonitriles, the molecules are disordered with respect to the location of the halogen atoms and the nitrile groups. There are no intermolecular X...NC interactions in any of the solids.
Ramberg-Baecklund Reaction of 1,3-Dibromo-1H,3H-naphthothiopyran 2,2-Dioxide. Formation of Acenaphthyne Intermediate
Nakayama, Juzo,Ohshima, Etsuo,Ishii, Akihiko,Hoshino, Masamatsu
, p. 60 - 65 (2007/10/02)
Radical bromination of 1H,3H-naphthothiopyran 2,2-dioxide (15) gave the corresponding monobromo sulfone 16 (48percent), dibromo sulfone 12 (43percent; cis/trans = 64/36), and tribromo sulfone 17 (5percent).Ramberg-Baecklund reaction of 12 was investigated under a variety of coditions with expectation of the formation of thiirene dioxide 11 from which generation of acenaphthyne (5) would be expected both thermally and photochemically.Observed characteristic features of the reaction are as follows: (i) the use of triethylamine as base yielded 1-bromo-acenaphthylene (20; 39percent) and debrominated products 15 (5percent) and 16 (9percent); (ii) the use of sodium methoxide as base afforded decacyclene (3) surprisingly, though in a trace amount, in addition to 20 (75percent) and acenaphthylene (18; 9percent); (iii) the use of potassium tert-butoxide as base gave an improved yield of 3 (5percent) along with 20 (36percent) and 18 (27percent).The formation of 3 may best be rationalized by assuming the generation of acenaphthyne intermediate 5 from 11 by loss of sulfur dioxide.
Unusual Base-induced Ring-opening Reactions of the Bis-tosylhydrazones of Dibenzobicyclooctadiene-2,3-dione and Acenaphthenequinone
Nakayama, Juzo,Segiri, Tsunehiko,Ohya, Ryuji,Hoshino, Masamatsu
, p. 791 - 792 (2007/10/02)
Unusual KOH-induced ring-opening reactions of the bis-tosylhydrazones of dibenzobicyclooctadiene-2,3-dione and acenaphthenequinone are described.
