Results 11 to 20 of about 9,421 (186)
1-Aryl-F-1,3-butadienes and Unsymmetrical α,ω-Diaryl-F-polyenes [PDF]
, 2016 Para-substituted 1-aryl-F-1,3-butadiene derivatives p-R-C6H4-CFCFCFCF2 (2a−g), where R = H, CH3, OCH3, OC6H11, N(CH3)2, Br, and CF3, have been prepared by reaction of appropriate arylmagnesium bromides with F-1,3-butadiene.
Mikhail M. Kremlev (3037311) +2 more
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Excited singlet states of "hairpin" polyenes [PDF]
, 1983 The synthesis and UV-visible, polarized-fluorescence and MCD spectra of 6 U-shaped hairpin polyenes (e.g., I) are reported. Qual. arguments and results of p-electron calcns.
Klingensmith, Kenneth A. +8 more
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Quasiparticle Excitations in Polyenes and Polyacetylene [PDF]
, 1987 We apply the Pariser-Parr-Pople Hamiltonian to study many-electron excitations in polyenes and polyacetylene. The excited singlet states of polyenes, calculated by a multireference double excitation expansion, are classified as quasi-particle excitations,
Klaus Schulten, Paul Tavan
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Polyenes vs polyynes: Efficient pi-frame for nonlinear optical pathways [PDF]
, 2019 The electronic and vibrational hyperpolarizabilities of polyenes NH2-(HC=CH)(n)-NO2 and polyynes NH2-(C=C)(n)- NO2 have been investigated. As the chain length increases, the first hyperpolarizabilities increase drastically for polyenes, while they ...
Suh, SB, Lee, JY, Kim, KS
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Radical-Mediated Heck-Type Alkylation: Stereoconvergent Synthesis of Functionalized Polyenes [PDF]
, 2019 The stereospecific synthesis of polyenes is of great synthetic value. Disclosed herein is a new, efficient, stereoconvergent approach for the synthesis of functionalized polyenes via a radical-mediated Heck-type alkylation.
Xinxin Wu (1672492) +7 more
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Controlled synthesis of polyenes by catalytic methods [PDF]
, 1990 The synthesis of the following polyenes, utilizing, a molybdenum catalyst, is described: vinyl alkylidene, and ortho-trimethylsilyl-phenylacetylene. (CBS)
Schrock, R.R.
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Genealogy of Conjugated Acyclic Polyenes [PDF]
, 2017 Based on the total π-electron energies Eπs of Hückel Molecular Orbital (HMO) method for all the possible isomers of conjugated acyclic polyenes (C2nH2n+2) up to n = 7, the structure–stability relation of the possible isomers was analyzed.
Haruo Hosoya
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Synthesis and optical properties of terminally substituted conjugated polyenes [PDF]
, 2014 Long-chain, conjugated polyenes can function as molecular wires. This is shown by the photophysical properties of polyenes containing naphthyl, anthryl, and tetraphenylporphyrinyl (TPP) terminal groups. When the anthryl group in 1, which is obtainable by
Bäuerle, Peter +5 more
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Spectroscopic Investigations of Dithienyl Polyenes [PDF]
, 1999 To understand the properties of light-sensitive compounds used in optical limiters having photoinduced charge transfer mechanisms, we have investigated the photophysics of a series of di(2-thienyl-3,4–butyl)polyenes.
Charles W. Spangler +6 more
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, 1994 Full configuration interaction (FCI) calculations are reported for the closed-shell cyclic polyenes CNHN (N = 6, 10, 14, 18) in the Pariser-Parr-Pople (PPP) approximation, as a function of the hopping parameter.
Laura Gagliardi +5 more
core +1 more source