نتایج جستجو برای: co3

تعداد نتایج: 1341  

Journal: :Atmospheric Chemistry and Physics 2022

Abstract. Carbon dioxide is considered an inert gas that rarely participates in atmospheric chemical reactions. Nonetheless, we show here CO2 involved some important photo-oxidation reactions the atmosphere through formation of carbonate radicals (CO3⚫-). This potentially active intermediate CO3⚫- routinely overlooked chemistry concerning its effect on sulfate formation. The present work demons...

Journal: :Angewandte Chemie 2015
Liangbin Huang Dagmar Hackenberger Lukas J Gooßen

In the presence of catalytic [{IrCp*Cl2 }2 ] and Ag2 CO3 , Li2 CO3 as the base, and acetone as the solvent, benzoic acids react with arenediazonium salts to give the corresponding diaryl-2-carboxylates under mild conditions. This C-H arylation process is generally applicable to diversely substituted substrates, ranging from extremely electron-rich to electron-poor derivatives. The carboxylate d...

Journal: :Molecules 2007
Petr Jansa Vladimír Machácek Petr Nachtigall Vladimír Wsól Markéta Svobodová

Syntheses of 2,6-bis[((3S)-3-(methoxycarbonyl)-1,2,3,4-tetrahydroisoquinolin-2-yl)carbonyl]pyridine and its coordination compounds with Cu2+, Co2+, Co3+, or Fe3+ are described. By means of 1H- and 13C-NMR spectra it was proved that 2,6-bis[((3S)-3-(methoxycarbonyl)-1,2,3,4-tetrahydroisoquinolin-2-yl)carbonyl]pyridine as well as its coordination compound with Co3+ exist in the form of a mixture ...

2009
JOHN MAGINNIS

The third Conway group Co3 is one of the twenty-six sporadic finite simple groups. The cohomology of its Sylow 2-subgroup S is computed, an important step in calculating the mod 2 cohomology of Co3. The spectral sequence for the central extension of S is described and collapses at the sixth page. Generators are described in terms of the Evens norm or transfers from subgroups. The central quotie...

Journal: :Proceedings. Biological sciences 2013
S Comeau R C Carpenter P J Edmunds

Data on calcification rate of coral and crustose coralline algae were used to test the proton flux model of calcification. There was a significant correlation between calcification (G) and the ratio of dissolved inorganic carbon (DIC) to proton concentration ([DIC] : [H(+)] ratio). The ratio is tightly correlated with [CO3(2-)] and with aragonite saturation state (Ωa). An argument is presented ...

Journal: :Dalton transactions 2008
Scott G Mitchell Chris Ritchie De-Liang Long Leroy Cronin

Three discrete cobalt-substituted silicotungstates, [Co3(H2O)(B-beta-SiW9O34)(B-beta-SiW8O29(OH)2)]12- (1), [Co3(H2O)(B-alpha-SiW9O34)(B-beta-SiW8O31)]14- (2), and [Co9Cl2(OH)3(H2O)9(B-beta-SiW8O31)3]17- (3), have been synthesized using a synthetic approach involving Co(II) ions, the dilacunary [gamma-SiW10O36]8- polyanion and a bulky organic cation in basic media; all three compounds have been...

Journal: :Discrete Mathematics 1982

Journal: :Zeitschrift für anorganische und allgemeine Chemie 2010

2016
Damiano Cattaneo Laura J. McCormick David B. Cordes Alexandra M.Z. Slawin Russell E. Morris

Two salts of the chlorhexidine di-cation (H2CHx2+) - (H2CHx)(SO4)·3H2O and (H2CHx)(CO3)·4H2O - have been synthesised and characterised crystallographically.

Journal: :The Science of the total environment 2013
Davide Vione Rosalinda Caringella Elisa De Laurentiis Marco Pazzi Claudio Minero

The UV filter benzophenone-3 (BP3) has UV photolysis quantum yield ΦBP3=(3.1±0.3)·10(-5) and the following second-order reaction rate constants: with (•)OH, k(BP3,(•)OH)=(2.0±0.4)·10(10) M(-1) s(-1); with the triplet states of chromophoric dissolved organic matter ((3)CDOM*), K(BP3,(3)CDOM*)=(1.1±0.1)·10(9) M(-1) s(-1); with (1)O2, k(BP3,(1)O2)=(2.0±0.1)·10(5) M(-1) s(-1), and with CO3(-•), k(B...

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