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Showing 1 to 9 of 9 for “"1,3-cyclohexadiene"”.
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Synthesis and Characterization of Well-Defined Poly(1,3-Cyclohexadiene) Homopolymers and Copolymers
Polymers containing poly(1,3-cyclohexadiene) were synthesized using a novel pre-formed initiator comprised of an alkyllithium and a tertiary diamine. The use of a pre-formed intiator at moderate temperatures (25° C) enabled the synthesis of high molecular weight poly(1,3-cyclohexadiene) …
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Niobium-mediated synthesis of phosphorus-rich molecules
… pyridine-N-oxide in the presence of excess 1,3-cyclohexadiene, generating niobium oxo and R2CP8(C 6H8). Searching for new platforms to investigate niobium-phosphorus chemistry led to the synthesis of [Na(THF) 3][P3Nb(ODipp) 3], an anionic cyclo-P3 complex that is accessible in two steps from …
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Part One: Radical Cation and Triplex Diels-Alder Reactions. Part Two: Photochemistry of Tri-1-Naphthylboron
… the Diels-Alder dimerization of 1,3-cyclohexadiene (1) is shown to be the result of the reaction of the radical cation of 1. A chain mechanism and a fast rate constant for addition of the radical cation of 1 to a neutral molecule of 1 are applied to explain a similar reaction using an …
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Selective criteria in Werner clathrates
… hydrocarbons: cyclohexane, cyclohexene, 1,3-cYclohexadiene, 1,4-cyclohexadiene and benzene. Host to guest ratios were elucidated by density and proton nuclear magnetic resonance spectroscopy. The thermal characteristics of the compounds were analysed by thermogravimetric analysis and …
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I. Direct observation of o-xylylene (o-quinodimethane) in solution, Dimerization kinetics of some o-quinodimethanes; II. Kinetic and product studies on the dimerization of [alpha]-methyl-substituted o-quinodimethanes; III. Direct observation of 1,2-napthoquinodimethane and 9,10-phenanthroquinodimethane, Dimerization kinetics of resonance-stabilized o-quinodimethanes
… kinetics of 5-ethylidene-6-methylene-1,3-cyclohexadiene (9) and 5,6-bis(ethylidene)-1,3-cyclohexadiene (10) were studied by stopped-flow UV-visible spectroscopy. At 25(DEGREES)C in CH(,3)CN k(,9)/k(,1) = 0.59 and k(,10)/k(,1) = 0.016. The dimerization of 9 and 10 led predominantly to one …
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From the activation of tetraphosphorus to the chemistry of diphosphorus and beyond
… 1,3-butadiene, isoprene, 1,3-pentadiene, and 1,3-cyclohexadiene also provided evidence for incorporation of P2 units via double Diels-Alder reactions. Theoretical investigations provided support for the formation of P2 molecules from photo-excited P4. Investigations into the physical and chemical …
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Adventures in polyene chemistry
… is smoothly converted into 2,3-divinyl-1,3-cyclohexadiene, which reacts with the dienophile N-methylmaleimide to give single, double or triple Diels-Alder adducts in a selective manner. All three Diels-Alder adducts can also be accessed in one pot starting from tetravinylethylene.
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Adventures in polyene chemistry
… is smoothly converted into 2,3-divinyl-1,3-cyclohexadiene, which reacts with the dienophile N-methylmaleimide to give single, double or triple Diels-Alder adducts in a selective manner. All three Diels-Alder adducts can also be accessed in one pot starting from tetravinylethylene.
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Taming reactive phosphorus intermediates with organic and inorganic carriers
… and is alternatively trapped reversibly by a 1,3-cyclohexadiene (CHD) to form in situ C₆H₈P₂Nb(ODipp)₃ Unprotected dibenzo-7[lambda]³A3-phosphanorbornadiene derivatives RPA (A= C₁₄H₁₀ or anthracene; R = tBu, dbabh, HMDS, iPr₂N, cis-Me₂ Pip, Cy₂N, Me₂N) were synthesized by treatment of the …