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A mixture of cis-decalin and CXB can simultaneously match optical index and density of PMMA. [1] Due to the moderate dielectric constant of CXB (ε = 7.9 [2]), PMMA acquires charges that can be screened by the addition of salt (e.g. tetrabutyl ammonium bromide), leading to a very good approximation of colloidal hard sphere. [3]
The reaction is highly stereospecific in the sense that the double bond stereochemistry is generally transferred to the relative configuration of the epoxide with essentially perfect fidelity, so that a trans-olefin leads to the stereoselective formation of the trans-2,3-substituted epoxide only, as illustrated by the example above, while a cis ...
trans-1,3-Disubstituted cyclohexanes are like cis-1,2- and cis-1,4- and can flip between the two equivalent axial/equatorial forms. [ 2 ] Cis -1,4-Di- tert -butylcyclohexane has an axial tert -butyl group in the chair conformation and conversion to the twist-boat conformation places both groups in more favorable equatorial positions.
2,3,7,8-Tetrachlorodibenzofuran (TCDF) is a polychlorinated dibenzofuran with a chemical formula of C 12 H 4 Cl 4 O. TCDF is part of the chlorinated benzofuran (CDF) family that contains between 1 and 8 chlorine atoms attached to the parent dibenzofuran ring system. The CDF family includes 135 compounds, of which only a few have been studied.
Bag-1 internal ribosome entry site (IRES) Bamboo mosaic potexvirus (BaMV) cis-regulatory element; Bamboo mosaic virus satellite RNA cis-regulatory element; Bovine leukaemia virus RNA packaging signal; Burkholderiales-2 RNA motif
Enoyl-CoA-(∆) isomerase (EC 5.3.3.8, also known as dodecenoyl-CoA-(∆) isomerase, 3,2-trans-enoyl-CoA isomerase, ∆3(cis),∆2(trans)-enoyl-CoA isomerase, or acetylene-allene isomerase, [1] is an enzyme that catalyzes the conversion of cis- or trans-double bonds of coenzyme A (CoA) bound fatty acids at gamma-carbon (position 3) to trans double bonds at beta-carbon (position 2) as below:
cis-1,2-Dihydrocatechol is the organic compound with the formula C 6 H 6 (OH) 2. Several isomers exist with this formula. It is a colorless solid melting near room temperature. The compound is classified as a 1,3-cyclohexadiene. It arises by the dihydroxylation of benzene catalyzed by toluene dioxygenase.
The final step is tosylation and alkylation of the alcohol which gives (+)-cis-7,8-epoxy-2-methyloctadecane with high yield. [6] Additionally, the stereospecific Gringard products of (R)-2,3-cyclohexylideneglyceraldehyde are two 1,2-syn-diols that can be used to produce either enantiomer of disparlure. Additionally, a simple reaction of ...