42984-19-0Relevant academic research and scientific papers
Liquid-phase noncatalytic butene oxidation with nitrous oxide
Semikolenov,Dubkov,Starokon',Babushkin,Panov
, p. 948 - 956 (2007/10/03)
The kinetics and mechanism of noncatalytic liquid-phase oxidation of but-1-ene and but-2-ene with nitrous oxide in a benzene solution in the temperature range from 180 to 240°C were studied. Oxidation proceeds via the 1,3-dipolar cycloaddition mechanism to form carbonyl compounds. Both of these reactions occur with close rates and activation energies and have the first orders with respect to the alkene and N2O. A considerable fraction (39%) of but-1-ene involved in oxidation undergoes cleavage at the double bond yielding propanal and an equivalent amount of methylene, the latter producing ethylcyclopropane and cycloheptatriene. The oxidation of but-2-ene proceeds with a minimum bond cleavage and affords methyl ethyl ketone with 84% selectivity. Regularities of the oxidation of terminal and internal alkenes C 2-C8 with nitrous oxide were analyzed using the previously published data.
(Cycloalkylmethyl)bis(η5-cyclopentadienyl)titanium(III) Complexes
Lehmkuhl, Herbert,Fustero, Santos
, p. 1361 - 1370 (2007/10/02)
Reaction of bis(cyclopentadienyl)titanium dichloride (1) and isopropylmagnesium bromide (2) with the methylenecycloalkanes 3-8 (cyclopropane), 35 (cyclobutane), and 37 (cyclopentane) leads to the (cycloalkylmethyl)bis(cyclopentadienyl)titanium(III) compounds 9-14, 36, and 38.The cyclopropylmethyl complexes 12-14, which have et least two geminal methyl substituents, are stable.Compounds 9-11, 36, and 38, in which appropriate substituents are lacking, rearrange by ring opening followed by C=C bond isomerization to give the (η3-allyl)bis(η5-cyclopentadienyl)titanium complexes 23-26 and 40.
