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Monomeric LiPhNNPhSiMe3.2Et2O was obtained by deprotonation of PhHNNPhSiMe3 with BuLi in the presence of Et2O. Reaction of NaN(SiMe3)2 with PhHNN(SiMe3)2 in a C6H6/THF mixt. provided monomeric NaPhNN(SiMe3)2.3THF, or NaPhNN(SiMe3)2.THF using a small amt. o ...
Mixtures of (EE)-2-methyl-1-silyloxypenta-1,3-dienes, enoxysilanes, SO2 and (t-Bu)Me2SiOTf (catalyst) generate (Z)-5-alkyl-1,3-dimethyl-6-oxo-4-silyloxyalk-2-enesulfinic acids that undergo stereoselective retro-ene eliminations of SO2 with the formation of ...
The reaction of 4-methoxy-1,2,3,4-tetrahydroisoquinolines I (R = MeO, R1 = H; RR1 = OCH2O) with Li diisopropylamide affords dimerization products II. The intermediacy of orthoquinodimethanes and diradicals is assumed. [on SciFinder (R)] ...
Coupled solute transport and reaction models are computationally demanding when multispecies, multidimensional simulations are considered. Split-operator methods approximate solutions to the reactive solute transport problem that are both relatively effici ...
Modelling and Simulation Society of Australia Inc.1995
Azomethines (Schiff's bases) derived from a,b-unsatd. a-fluoroaldehydes can be deprotonated with lithium diisopropylamide. The resulting "anions" or, correctly, 3-fluoro-1-azapentadienyl lithium compds. are conformationally mobile. While eight different ...
The pptn. of barium sulfate from a basic EDTA complex upon addn. of a small vol. of acid in a stirred-tank reactor was used as a model reaction to study the local state of micromixing. Limitations and modifications of this reaction are presented, and its a ...
The heterogeneous reactions of NO3 on NaCl and KBr salt were studied at room temp. using a Knudsen reactor equipped with dual detection, namely Laser induced fluorescence and mass spectrometry. The uptake coeffs. of NO3 were g=(4.9+-3).10-2 onto NaCl and g ...
HOBr can be formed in various oxidation processes in engineered and natural systems. The rate of HOBr reduction by H2O2 is decisive to avoid formation of brominated organic compounds and bromate during ozone or hydrogen peroxide-based advanced or naturally ...
The polymn. of isoprene induced by alkyl lithium compds. in hydrocarbon solvents is known to proceed with a high stereoselectivity to (Z)-1,4-polyisoprene. We have studied the initiation step of this reaction with the help of ab initio mol. dynamics simula ...
In this paper, we present case studies of oxidative transformations of contaminants by oxidants which are relevant in natural and in technical systems. These oxidants are reactive oxygen species (ROS), manganese(III,IV), iron(III), and molecular dioxygen ( ...
