55702-41-5Relevant academic research and scientific papers
Analysis of non-extractable DDT-related compounds in riverine sediments of the Teltow Canal, Berlin, by pyrolysis and thermochemolysis
Kronimus, Alexander,Schwarzbauer, Jan,Ricking, Mathias
, p. 5882 - 5890 (2006)
Eighteen pre-extracted samples derived from a subaquatic riverine sediment core taken from the Teltow Canal, Berlin (Germany), were treated by off-line TMAH-thermochemolysis and subsequently analyzed by GC-MS to investigate release and thermodegradation o
A Relationship between Selectivity and Solvent Composition for Nucleophilic Attack on Carbocations in Alcohol-Water Mixtures
Bentley, T. William,Ryu, Zoon Ha
, p. 761 - 768 (2007/10/02)
Rate constants and products of solvolyses of p-methoxybenzyl chloride 1, chlorodiphenylmethane 2 (Y = Z = H), chloro(4-chlorophenyl)phenylmethane 2 (Y = H, Z= Cl) and chlorobis(4-chlorophenyl)methane 2 (Y = Z = Cl) are reported in ethanol- and methanol-water mixtures at 25 deg C.Product selectivities (S), defined by: S = / are related to four rate constants for reactions involving one molecule of solvent as nucleophile and another molecule of solvent as general base catalyst (e.g. kwa involves water as nucleophile and alcohol as general base, and kww, kaw and kaa are defined similarly).A linear relationship between 1/S and molar ratios of solvent 1/S = (kwa/kaw)(/) + kww/kaw is derived theoretically and validated experimentally for solvolyses of the above substrates from water up to 70percent alcohol-water-in this range of solvents, the contribution from kaa can be neglected.For solvolyses of p-methoxybenzyl chloride, S is independent of pH between pH 2 and 12, S decreases when acetone is added but increases if acetonitrile is added and for 90percent ethanol-water S increases with added LiCl and LiClO4 and increases further if acetonitrile is also present.
The Absolute Kinetics of Several Reactions of Substituted Diphenylcarbenes
Hadel, L. M.,Maloney, V. M.,Platz, M. S.,McGimpsey, W. G.,Scaiano, J. C.
, p. 2488 - 2491 (2007/10/02)
4,4'-dibromo-, 4-bromo-, 4,4'-dichloro-, 4-chloro-, 4-methyl-, 4,4'-dimethyl-, 4-phenyl-, 4-carbomethoxyl-, 4-cyano-, 4-cyano-4'-methyl-, and 4,4'-dimethyldiphenyldiazomethane were studied by laser flash photolysis.Excitation of the diazo compounds at 308 nm produced the corresponding diarylcarbenes.The kinetics of the reaction of the substituted carbenes with alkanes and methanol were examined.Hydrogen abstraction rates are largely insensitive to ring substitution, while the methanol reaction is accelerated considerably by p-methyl substitution and retarded by a para electron-withdrawing substituent.
Electrochemical Oxidation of Benzophenone Hydrazones
Chiba, Toshiro,Okimoto, Mitsuhiro,Nagai, Hiroshi,Takata, Yoshiyuki
, p. 2968 - 2972 (2007/10/02)
The anodic oxidation of benzophenone hydrazones (1) was found to give several products, depending upon the electrolysis conditions employed such as electrode material, temperature, and electrolyte composition.For example, the oxidation using a platinum anode at room temperature in LiClO4-MeCN afforded exclusively benzophenone azines (2), whereas in NaOMe-MeOH benzophenone dimethyl acetals (3) were formed as the main products.On the other hand, the oxidation using a graphite anode in refluxing MeOH containing NaOMe gave diphenylmethyl methyl ethers (4), along with diphenylmethanes (5).When the analogous electrolysis was conducted in the presence of methacrylic acid derivatives, corresponding diphenylcyclopropanes (7) were obtained in relatively high yields.
