Hydrogen Peroxide cis-Oxidative Cleavage of 2,5-Diarylfurans. Conformations and Reactions of cis and trans Methyl- and Mesityl-Dimesitoylethylenes1

1958 ◽  
Vol 23 (12) ◽  
pp. 1861-1870 ◽  
Author(s):  
ROBERT E. LUTZ ◽  
CHI-KANG DIEN
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidative Cleavage ◽  
Trans Methyl ◽  
Cis And Trans

scholarly journals Hydrogen Peroxide Oxidation of Coordinated Thiocyanate Ion in cis- and trans-[Coen2NH3NCS]2+: The Preparation and Properties of trans-[Coen2NH3CN]2+

1973 ◽  
Vol 51 (24) ◽  
pp. 4152-4158 ◽  
Author(s):  
Albert Richard Norris ◽  
James William Lennox Wilson
Keyword(s):  
Hydrogen Peroxide ◽  
Spectral Properties ◽  
Peroxide Oxidation ◽  
Reaction Conditions ◽  
Thiocyanate Ion ◽  
Hydrogen Peroxide Oxidation ◽  
Percent Conversion ◽  
Cis And Trans ◽  
In Cis

The hydrogen peroxide oxidation of thiocyanate ion in cis- and trans-[Coen2NH3NCS]2+ leads to the formation of the corresponding cis- and trans-cyanoammine- and diamminebis(ethylenediamine)cobalt-(III) complexes. The spectral properties of the previously unreported trans-[Coe2NH3CN]2+ are reported and compared to the spectral properties of the cis-isomer.Observations are made concerning the reaction conditions which favor a high percent conversion of trans-[Coen2NH3NCS]2+ to trans-[Coen2NH3CN]2+.

scholarly journals Comparing inhalation and ingestion exposure to chemical contaminants and odorants in mixtures

2017 ◽  
Vol 18 (5) ◽  
pp. 1739-1746
Author(s):  
D. L. Gallagher ◽  
K. Phetxumphou ◽  
A. M. Dietrich
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Minor Component ◽  
Biological Properties ◽  
Threshold Concentration ◽  
Water Utility ◽  
Chemical Spills ◽  
Odour Threshold ◽  
Trans Methyl ◽  
Cis And Trans

Abstract Chemical spills polluting drinking water are often mixtures with each chemical having unique characteristics for partitioning, toxicity, and odour leading to significant differences in human risk exposures. A 2014 chemical spill of crude (4-methylcyclohexyl)methanol (MCHM) resulted in a $126 million USD fine to the water utility. The spill consisted of at least ten chemicals including 34% cis- and 60% trans-4-MCHM and 0.7% cis- and 0.3% trans-methyl-4-methylcyclohexanecarboxylate (MMCHC). While a very minor component, trans-MMCHC contributed substantially to odour because of its high Henry's Law Constant, 2.23 × 10−2 at 40 °C showering, and low odour threshold concentration (OTC), 0.02 ppb-v, air. Using USEPA risk assessment parameters in a 15-minute shower model with influent concentration of 42 ppb-aq cis- and trans-4-MMCHC, representative of initial spill concentrations in the distribution system, adult ingestion and inhalation for trans-MMCHC were almost equal, 4.00 × 10−4 and 4.26 × 10−4 mg/kg/d, respectively. For children, inhalation doses exceeded ingestion dose: 1.72 × 10−3 mg/kg/d versus 0.93 × 10−3 mg/kg/day trans-MMCHC. This exposure assessment with varying OTC for crude MCHM chemicals reinforces considering chemical, physical, and biological properties of all chemicals in the spill. Consumers aware of their exposure to chemicals in drinking water lost consumer confidence; the water utility was required to compensate individuals and businesses for financial losses.

scholarly journals Oxidative cleavage of cycloalkenes using hydrogen peroxide and a tungsten-based catalyst: towards a complete mechanistic investigation

2021 ◽  
Vol 45 (1) ◽  
pp. 235-242
Author(s):  
Tony Cousin ◽  
Gregory Chatel ◽  
Bruno Andrioletti ◽  
Micheline Draye
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Mechanism ◽  
Oxidative Cleavage ◽  
Mechanistic Investigation ◽  
By Products

The identification of intermediates and by-products issuing from the oxidative cleavage of cycloolefins allows proposing of a reaction mechanism.

Efficient ruthenium-catalysed oxidative cleavage of methyl oleate with hydrogen peroxide as oxidant

RSC Advances ◽  
2013 ◽  
Vol 3 (1) ◽  
pp. 172-180 ◽  
Author(s):  
Arno Behr ◽  
Nils Tenhumberg ◽  
Andreas Wintzer
Keyword(s):  
Hydrogen Peroxide ◽  
Methyl Oleate ◽  
Oxidative Cleavage

Synthesis of cis and trans methyl 8- and 13-octadecenoate-d2 and d4 isomers

1978 ◽  
Vol 15 (S1) ◽  
pp. 625-636 ◽  
Author(s):  
R. O. Adlof ◽  
W. R. Miller ◽  
E. A. Emken
Keyword(s):  
Trans Methyl ◽  
Cis And Trans

A New Oxidative Cleavage of 2-Nitrocycloalkanones by Hydrogen Peroxide: An Important, Efficient Method for Dicarboxylic Acid or Ketoacid Synthesis

Synthesis ◽  
1988 ◽  
Vol 1988 (11) ◽  
pp. 915-917 ◽  
Author(s):  
Roberto Ballini ◽  
Enrico Marcantoni ◽  
Marino Petrini ◽  
Goffredo Rosini
Keyword(s):  
Hydrogen Peroxide ◽  
Dicarboxylic Acid ◽  
Efficient Method ◽  
Oxidative Cleavage
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