Cyclan

As mentioned, we also carried out IR studies (a fast vibrational spectroscopy) early in our work on carbocations. In our studies of the norbornyl cation we obtained Raman spectra as well, although at the time it was not possible to theoretically calculate the spectra. Comparison with model compounds (the 2-norbornyl system and nortri-cyclane, respectively) indicated the symmetrical, bridged nature of the ion. In recent years, Sunko and Schleyer were able, using the since-developed Fourier transform-infrared (FT-IR) method, to obtain the spectrum of the norbornyl cation and to compare it with the theoretically calculated one. Again, it was rewarding that their data were in excellent accord with our earlier work. 

Cyclan Cyclandelate Cyclan-Cap - Cyclandelate Cyclansato - Cyclandelate Cyclapen Cyclacillin Cycleat Cap - Cyclandelate Cyclidox - Doxycycline Cyclobec - Dicyclomine HC ... 

Hacosan (Sanko) Hi-Cyclane Cap. (Tyama) Mandelic (Seiko) Marucyclan (Maruko) Mitalon (Toyo Pharmar) Newcellan Cap. (Kowa) Saiclate (Moiishita) Sancyclan (Santen) Sepyron Cap. (Sankyo) Spadelate Cap. (Zeria) Venalal (Mochida) Zirkuiat (Nippon Shoji) USA Cyclospasmol (Ives) wfm generics wfm... 

Photoelimination of nitrogen from 1-pyrazolines has also been employed in the synthesis of tricyclo[3.2.1.02,4]oct-6-ene,338 prismane,339 quadri-cyclane,340 snoutene ,341 and marasmic acid.342 The trimethylenemethanes 414 have been prepared by photolysis of azoalkanes 415 and characterized spectroscopically.343 Dimerization and cycloaddition to alkenes of these biradicals have been reported.344... 

Guseva, A.N. and Parnov, E.I. Isothermal cross-sections of the systems cyclanes-water, Vestn. Most Univ., Ser. 11 Khim., 19 77-78, 1964. 

N-Acetylderivate der Aminocyclenole entstehen. Unter Nachbargruppen-beteiligung werden hierbei l-Arylamino-2(cis)-acetoxy-3(trans)brom-4-hydroxy (bzw. -acetoxy)-cyclane als einzige Produkte gebildet 50),... 

Although the term prochirality is frequently used, especially by biochemists, it suffers from a limitation which arises from a corresponding limitation in the definition of chirality. Molecules may display purely stereochemical differences without being chiral cis-tram isomers of olefins and certain achiral cis-trans isomers of cyclanes are examples. Thus (Fig. 2) (Z)- and ( )-1,2-dichloroethylene (4, 5) are achiral diastereomers, as are cis- and /rtww-1,3-dibromocyclobutanes (6, 7) being devoid of chirality these compounds have no chiral centers (or other chiral elements). Thus it is inappropriate to associate stereoisomerism with the occurrence of chiral... 

Deschamps, A., P. Baumgartner et C. Roux-Guerraz Nitrosation photo-chimique par le chlorure de nitrosyle de quelques alcanes, cyclanes et chloro-1 alcanes. C. R. hebd. S6ances Acad. Sci. 260, 4514 (1965). 

It is rather generally agreed (46) that a very extensive two-set exchange of cyclanes on Pd occurs via a roll-over mechanism proposed by Burwell (48, 49). 

El spectrum of tetralin. The complete aromatization through the loss of four hydrogen atoms is indicated by the presence of the peak at m/z 128. The most abundant ion results from the loss of ethylene. As in the case of most cyclanics, an intense ion is observed at (M-15), derived from the loss, following a rearrangement, of a methyl group. The typical ions benzylium (91) and phenylium (77) lose 26 Da, acetylene, and produce fragments at m/z 65 and 51, respectively. 

SYNS CALCIUM CYCLAMATE CALCIUM CYCLO-HEXANESULFAMATE CALCIUM CYCLOHEXANE SULPHAMATE CALCIUM CYCLOHEXYLSULFAMATE CYCLAMATE CALCIUM CYCLAMATE, CALCIUM SALT CYCLAN CYCLOHEXANESULFAMIC ACID, CALCIUM SALT CYCLOHEXYLSULPHAMIC ACID, CALCIUM SALT CYLAN DIETIL KALZIUMZY-KLAMATE (GERMAN) SUCARYL CALCIUM... 

In the Veba process [31], a mixture of vacuum residue, lignite and waste plastics is pyrolyzed under conditions similar to the case of crude oil hydrogenation. The main products include gaseous hydrocarbons, alkanes, cyclanes and aromatics. 

Whitehead E. V. (1974) The structure of petroleum penta-cyclanes. In Advances in Organic Geochemistry 1973 (eds. B. Tissot and F. Bienner). Editions Technip, Paris, pp. 225-243. 

Cyclic OR/NHa-acetals and SR/NH2-acetals, i.e. representatives of 2-amino-l-oxa-cyclanes and 2-amino-1-thia-cyclanes, respectively, have not been cited at all. 

Synonyms calcium N-cyclohexylsulfamate dihydrate Cyclan cyclohexanesulfamic acid calcium salt cyclohexylsulfamic acid calcium salt E952 Sucaryl calcium. 

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