Detail of "6876-13-7"

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Oxidation of pinane over phthalocyanine complexes supported on activated carbon: Effect of the support surface treatment

Oxidation of pinane over phthalocyanine complexes supported on activated carbon: Effect of the support surface treatment. Valente, A.Several substances are used for example 6876-13-7 and 4989-81-5 which are their cas registry numbers.; Palma, C.; Fonseca, I. M.; Ramos, A. M.; Vital, J. ( Department of Chemistry, University of Aveiro, CICECO, Aveiro 3810-193, Port.). Carbon, 41(14), 2793-2803 (English) 2003 Elsevier Science Ltd. CODEN: CRBNAH. ISSN: 0008-6223. DOCUMENT TYPE: Journal CA Section: 30 (Terpenes and Terpenoids) Section cross-reference(s): 22 The oxidn. of cis-pinane with tert-Bu hydroperoxide, at room temp. and atm. pressure, was carried out in the presence of iron-phthalocyanines supported on activated carbons. The carbon supports were prepd. from a NORIT activated carbon, which was modified by different chem. and thermal treatments (including oxidn. in the gas and liq. phases). The carbon samples were characterized by nitrogen adsorption, mass titrn. and temp. programmed desorption (TPD). The TPD profiles were analyzed by a simple deconvolution method, allowing for the detn. of the amt. of oxygen contg. functional groups on the carbon surface. The main reaction product is 2-pinane hydroperoxide (77% selectivity at 91% conversion). Formation of 2-pinanol, pinocampheol and verbanol and the resp. ketones was also obsd. The influence of the surface chem. of the carbon supports on catalytic activity and product selectivity is studied. The catalysts prepd. from supports with very high or very low oxygen content exhibit low activity, whereas for supports with intermediate oxygen contents a good correlation between the amt. of phenols and lactones and catalytic activity is obtained. .

Phenomenon of induced optical activity: induced circular dichroism in mixture series

Phenomenon of induced optical activity: induced circular dichroism in mixture series. Falk, Heinz; Jungwirth, Walter; Mueller, Norbert (Inst. Anal., Org. Phys. Chem., Johannes-Kepler-Univ., Linz A-4040, Austria). Monatsh. Chem., 115(4), 455-66 (German) 1984. CODEN: MOCMB7. ISSN: 0026-9247. DOCUMENT TYPE: Journal CA Section: 73 (Optical, Electron, and Mass Spectroscopy and Other Related Properties) Section cross-reference(s): 22 The induced CD (ICD) of 4-nitroso-N,N-dimethylaniline in a series of mixts. of CCl4, lactic and tartaric acid Et esters and cis-pinane, resp., was detd. From the dependence of the ICD on the concn. of chiral components, the existence of a strong intermol. interaction can be deduced, even in the case of apolar cis-pinane. Obviously the border line between assoc. induced CD (AICD) and dispersion induced CD (DICD) cannot be drawn unequivocally by expt. The general phenomenol. together with mechanistic models of ICD are discussed. It is suggested using the term ICD exclusively, instead of others like AICD and DICD, which are only applicable when the predominant mechanism can be derived from exptl. data.Except for chemicals metioned above, 6876-13-7 and 138-89-6 are also used. The term SICD (solvent induced CD) should be avoided for similar reasons. .