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4,4'-Diaminodicyclohexylmethane is the name for organic compounds with the formula CH 2 (C 6 H 10 NH 2) 2. It is classified as a diamine . In the epoxy industry it is often referred to as PACM, short for p ara -di a minodi c yclohexyl m ethane.
This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.
Proton transfer from the nucleophile (Z) to the leaving group (X) gives 4, which then collapses to eject the protonated leaving group (H−X), giving protonated carbonyl compound 5. The loss of a proton gives the substitution product, 6. Because the last step involves the loss of a proton, nucleophilic acyl substitution reactions are considered ...
Cyclohexanol is produced by the oxidation of cyclohexane in air, typically using cobalt catalysts: [5]. 2 C 6 H 12 + O 2 → 2 C 6 H 11 OH. This process coforms cyclohexanone, and this mixture ("KA oil" for ketone-alcohol oil) is the main feedstock for the production of adipic acid.
Some of the stereoisomers crystallize in more than one polymorph, with different densities and melting points — which range from 225 °C for myo-inositol to about 360 °C for polymorph "B" of scyllo-inositol. [4] There is a clear correlation between the melting points and the number and type of chains of hydrogen-bonded hydroxyls. [6]
trans-1,2-Diaminocyclohexane is an organic compound with the formula C 6 H 10 (NH 2) 2. This diamine is a building block for C 2-symmetric ligands that are useful in asymmetric catalysis. [1] A mixture of all three stereoisomers of 1,2-diaminocyclohexane is produced by the hydrogenation of o-phenylenediamine.
The enantioselective synthesis was accomplished by J. K. Whitesell by adding Pseudomonas fluorescens lipase to racemic trans-2-phenylcyclohexyl chloroacetate. [1] [2] This enzyme is able to hydrolyze the ester bond of the (−)-enantiomer but not the (+)-enantiomer.
In 1937, Marc Tiffeneau, Weill, and Tchoubar published in Comptes Rendus their finding that 1-aminomethylcycloahexanol converts readily to cycloheptanone upon treatment with nitrous acid. [4] Perhaps due to such a large ring being expanded, the authors did not immediately relate it to the Demjanov rearrangement.