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Benzyl Chloride (benzyl + chloride)
Selected AbstractsChemInform Abstract: A Simple and Convenient Method for the Preparation of Diborane from Tetrabutylammonium Borohydride and Benzyl Chloride for Application in Organic Synthesis.CHEMINFORM, Issue 3 2008Mariappan Periasamy Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Synthesis, Crystal Structure of Co(II)(6-methoxybenzothiazole- 2-carboxylate)2(DMF)2 and Its Application to Carbonylation of Benzyl ChlorideCHINESE JOURNAL OF CHEMISTRY, Issue 1 2010Bin Zhang Abstract A new complex, Co(MBTC)2(DMF)2 (MBTC=6-methoxybenzothiazole-2-carboxylate, DMF=N,N -dime- thylformamide), was synthesized in DMF solution and characterized by single crystal X-ray diffraction analysis. Using the cobalt complex as catalyst, phenylacetic acid was prepared by the carbonylation of benzyl chloride with carbon monoxide (0.1 MPa). The effects of solvents, phase transfer catalysts and temperature on the reactions were investigated. The yield of phenylacetic acid was higher than 90% in optimized condition. [source] Multireference Calculation of the Photodissociation of Benzyl ChlorideCHINESE JOURNAL OF CHEMISTRY, Issue 2 2007Jun Cao Abstract The photodissociation mechanism of benzyl chloride (BzCl) under 248 nm has been investigated by the complete active space SCF (CASSCF) method by calculating the geometries of the ground (S0) and lower excited states, the vertical (Tv) and adiabatic (T0) excitation energies of the lower states, and the dissociation reaction pathways on the potential energy surfaces (PES) of S1, T1 and T2 states. The calculated results clearly elucidated the photodissociation mechanism of BzCl, and indicated that the photodissociation on the PES of T1 state is the most favorable. [source] ChemInform Abstract: Oxidation of Benzyl Chlorides and Bromides to Benzoic Acids with 30% Hydrogen Peroxide in the Presence of Na2WO4, Na3VO4, or Na2MoO4 under Organic Solvent-Free Conditions.CHEMINFORM, Issue 37 2001Min Shi Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Atom transfer radical polymerization of butadiene using MoO2Cl2/PPh3 as the catalystJOURNAL OF APPLIED POLYMER SCIENCE, Issue 6 2007Jing Hua Abstract Atom transfer radical polymerization has been used to successfully synthesize polybutadiene. This was achieved by using MoO2Cl2/triphenyl phosphine as the catalyst and the various organic halide compounds such as methyl-2-chloropropionate, CCl4, 1,4-dichloromethyl benzene, 1-phenylethyl chloride, and benzyl chloride as initiators. The monomer conversion increased up to 50% with polymerization time. The polydispersity indices of the polymers were as high as above 1.5. However, the polymerizations were controlled and the polydispersity indices of the polymers were less than 1.5 throughout the polymerizationin reverse atom transfer radical polymerization. The chemical structure of the polymer obtained was characterized by 1HNMR and FTIR. The valency states of molybdenum in this reactive system were detected by UV,vis spectra. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 3517,3522, 2007 [source] Synthesis and alkylation of 5-(3-chlorobenzo[b]thien-2-yl)-4H -1,2,4-triazole-3-thiol under classical and microwave conditions.JOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 6 2006AM1 semiemperical calculations for investigating the regioselectivity of alkylation Under microwave irradiation (MWI), 5-(3-chlorobenzo[b]thien-2-yl)-4H -1,2,4-triazole-3-thiol (3) was synthesized in a good yield by intramolecular cyclization of the carbonyl thiosemicarbazide 2. A regioselective S-alkylation of 3 with benzyl chloride or allyl bromide has been achieved by using triethylamine as a base, while other different basic conditions led to a mixture of bis(alkylated) derivatives N4, S- and S, N2 -, under both of classical and MWI conditions. The relative stabilities, charge densities, dipole moments and electronic energies of reactants, transition states and intermediates were calculated by the AM1 method and used for investigating the regioselectivity. [source] Versatile preparation of poly(1,4-phenylenevinylene- co -1,4-phenylene-1,2-ethanediyl) by CVD polymerization of p -(methoxymethyl)benzyl chlorideJOURNAL OF POLYMER SCIENCE (IN TWO SECTIONS), Issue 4 2005Ngo Trinh Tung Abstract It was demonstrated that a series of copolymers consisting of 1,4-phenylenevinylene (PV) and 1,4-phenylene-1,2-ethanediyl (PE) units could be prepared from a single monomer, p -(methoxymethyl)benzyl chloride, via the chemical vapor deposition polymerization (CVDP) method. The composition of the copolymers could be varied simply by altering the monomer activation temperature. The higher the temperature, the lower the content of the PV unit. The photo (PL)- and electroluminescence (EL) properties of the copolymers that revealed a blueshift when compared with PPV strongly depend on the amount of the PE units incorporated. The external quantum efficiencies of the electroluminescence devices having the configuration of ITO/PEDOT-PSS/copolymer/Al-Li were higher than that of PPV, which can be ascribed to the improved confinement of excitons. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 742,751, 2005 [source] Fusion,Fission Transport of Probes and Quenchers in Microdomains of an Amphiphilic Ionene Polyelectrolyte,PHOTOCHEMISTRY & PHOTOBIOLOGY, Issue 3 2007Celize M. Tcacenco In aqueous solution, amphiphilic ionenes such as the [3,22]-ionene spontaneously adopt globular conformations and form microdomains that are highly micelle-like, i.e. are capable of solubilizing organic molecules, binding and exchanging counterions and accelerating or inhibiting the rates of bimolecular reactions. Time-resolved fluorescence decay of pyrene and pyrene derivatives solubilized in these microdomains at concentrations where excimer formation occurs show that even water-insoluble probes can migrate between the hydrophobic microdomains formed in aqueous solution by a [3,22]-ionene chloride (with the N-terminal groups quaternized with benzyl chloride). Time-resolved studies of the quenching of pyrene fluorescence by alkylpyridine derivatives revealed similar behavior. The observed quenching behavior requires that the migration be between microdomains on the same ionene chain or same group of associated ionene chains and is consistent with migration dominated by fusion/fission transport of the probe and quencher. [source] Similarities and differences between bis[2-(bromomethyl)phenyl] diselenide, bis[2-(chloromethyl)phenyl] diselenide and bis[2-(hydroxymethyl)phenyl] diselenideACTA CRYSTALLOGRAPHICA SECTION C, Issue 8 2009Alberth Lari The title compounds, C14H12Br2Se2, (I), C14H12Cl2Se2, (II), and C14H14O2Se2, (III), feature a diselenide bridge between two o -benzyl bromide [in (I)], two o -benzyl chloride [in (II)] or two o -benzyl alcohol units [in (III)]. In the molecular structure of (I) and in both independent molecules of (II), close contacts are observed between the halogen centres and the diselenide unit. In the case of modification (IIIa), strong hydrogen bonds between the ,OH groups dominate, whereas the molecular structures of modification (IIIb) and bis{2-[(dimethylamino)methyl]phenyl} diselenide, C18H24N2Se2, (IV), are comparable with those of (I) and (II). A correlation between the strength of the contacts and the angle between the benzene planes and the Se,Se units is found. [source] Synthesis, Crystal Structure of Co(II)(6-methoxybenzothiazole- 2-carboxylate)2(DMF)2 and Its Application to Carbonylation of Benzyl ChlorideCHINESE JOURNAL OF CHEMISTRY, Issue 1 2010Bin Zhang Abstract A new complex, Co(MBTC)2(DMF)2 (MBTC=6-methoxybenzothiazole-2-carboxylate, DMF=N,N -dime- thylformamide), was synthesized in DMF solution and characterized by single crystal X-ray diffraction analysis. Using the cobalt complex as catalyst, phenylacetic acid was prepared by the carbonylation of benzyl chloride with carbon monoxide (0.1 MPa). The effects of solvents, phase transfer catalysts and temperature on the reactions were investigated. The yield of phenylacetic acid was higher than 90% in optimized condition. [source] Multireference Calculation of the Photodissociation of Benzyl ChlorideCHINESE JOURNAL OF CHEMISTRY, Issue 2 2007Jun Cao Abstract The photodissociation mechanism of benzyl chloride (BzCl) under 248 nm has been investigated by the complete active space SCF (CASSCF) method by calculating the geometries of the ground (S0) and lower excited states, the vertical (Tv) and adiabatic (T0) excitation energies of the lower states, and the dissociation reaction pathways on the potential energy surfaces (PES) of S1, T1 and T2 states. The calculated results clearly elucidated the photodissociation mechanism of BzCl, and indicated that the photodissociation on the PES of T1 state is the most favorable. [source] Evidence for extended ,,n-participation in solvolysis of some benzyl chloridesJOURNAL OF PHYSICAL ORGANIC CHEMISTRY, Issue 12 2003Sandra Juri Abstract Chlorides 3 (1-aryl-1-chloro-4-methyl-7-methoxy-4-heptene) and 4 (1-aryl-1-chloro-4-methyl-4-hexene) with various phenyl substituents were prepared (Y=p -OCH3, p -CH3, H and m -Br) and the solvolysis rates were measured in 80% (v/v) aqueous ethanol. The rate constants of 3 correlate well with ,+, and the ,+ value obtained is ,1.45±0.15, whereas with 4 breakdown of the Hammett plot occurs, and the ,+ value without the p -anisyl group is ,2.55±0.20, indicating extended ,,n-participation in 3 and simple ,-participation in 4. The drastically smaller activation parameters obtained with 3 than with 4 are consistent with the proposed mechanism in which the high degree of order required in the transition state (large negative ,S,) is overcompensated by a small ,H,. Copyright © 2003 John Wiley & Sons, Ltd. [source] | |||||||||||||