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Water losses from both 1- and 2-indanol are characterized by large kinetic energy releases. Acetic acid elimination is shown to occur specifically 1,3 from 1-acetoxyindan and 1,2 from 2-acetoxyindan.G. S. GroenewoldDepartment of Chemistry, University of Nebraska, Lincoln, Nebraska 68588, USA...
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This weekend, at Nov/14/2021 09:05 (Moscow time) we will hold Codeforces Round 755 (Div. 1, based on Technocup 2022 Elimination Round 2) and Codeforces Round 755 (Div. 2, based on Technocup 2022 Elimination Round 2). They are based on problems of Technocup 2022 Elimination Round 2 ...
Ab initio (HF and MP2) and DFT calculations have been carried out to find the activation barrier and the structure of the transition state for this reaction channel from both EC and 1,2-DCE. The preexponential factors calculated at various levels of theory (BF/6-311++G**, MP2/6-311...
Shifts of the 1Ag→1B+u electronic absorption of carotenoids in nonpolar and polar solvents The1B+uenergy of carotenoids (spheroidene, neurosporene, and β carotene) exhibits a linear dependence onR(n)=(n2−1)/(n2+2) in both nonpolar and polar s... H Nagae,M Kuki,RJ Cogdell,.....
{0040-4039}, journal = {TETRAHEDRON LETTERS}, language = {eng}, number = {37}, pages = {6535--6538}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, title = {Straightforward synthesis of alkynyl imines via 1,2-elimination of alpha,alpha-dichloroketimines}, volume = {48}, year = {2007...
Dimethyl acetals of phenylacetaldehyde 1a and 2-phenylpropionaldehyde 1b, upon treatment with 1.25 equiv. of LICKOR reagent, undergo 1,2-elimination (THF at –95 °C) promoted by metallation at the benzylic site, and afford the corresponding enol ethers in the E-form. When the substrate is...
(e.g.10) in an inert solvent produces often excellent yields of a 1,2,5-oxadiazinane (e.g.11) by a pathway which features a retro-Cope elimination and a Meisenheimer rearrangement; reduction of the oxadiazinanes leads to vicinal diamines and hence overall amination of the alkene ...
When X = F, Cl, or Br, 2-CH2CH2X was not observed en route to 3-X, signifying that olefin insertion was rate-determining. Insertion rates suggested that substantial positive charge on the substituted carbon was incurred. The reactivity of other H2CCHX with 1, and a discussion of the ...