Results 11 to 20 of about 3,133 (222)

Stereoregularity in ionic polymerization of acenaphthylene

Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1964
Four distinct polymers were isolated from the polymerizations of acenaphthylene initiated by boron trifluoride and n-butyllithium. A syndiotactic or isotactic conformation was assigned to these products on the basis of infrared and NMR evidence. The conformations and reaction details are discussed.
Story, V. M., Canty, G.
openaire   +3 more sources

Theoretical Study of Thermal Cracking For Acenaphthylene Molecule

مجلة بغداد للعلوم, 2013
Density Functional Theory (DFT) calculations were carried out to study the thermal cracking for acenaphthylene molecule to estimate the bond energies for breaking C8b-C5a , C5a-C5 , C5-C4 , and C5-H5 bonds as well as the activation energies.
Baghdad Science Journal
doaj   +3 more sources

Effect of a ring on the cyclic conjugation in another ring: applications to acenaphthylene-type polycyclic conjugated molecules [PDF]

Journal of the Serbian Chemical Society, 2010
In a recent work, a method was developed for assessing the influence ief(G, Z0|Z1) of a ring Z1 on the energy effect of another ring Z0 in a polycyclic conjugated molecule G. Herein, a report is given of detailed numerical investigations of ief(G, Z0|Z1)
SLAVKO RADENKOVIĆ, SVETLANA JEREMIĆ, IVAN GUTMAN, BORIS FURTULA   +3 more
doaj   +3 more sources

Coronene Bisimide as a Visible-Light-Mediated Triplet-Triplet Energy Transfer Catalyst. [PDF]

Chemistry
Coronene bisimide (CBI) with its efficient intersystem crossing was used as a visible‐light‐absorbing photosensitizer. Different reactions, including cycloadditions and oxidations, were demonstrated via triplet‐energy transfer from CBI. Abstract Photosensitization has emerged as a versatile tool to facilitate access to excited states under mild ...
Sukumaran DP, Würthner F.
europepmc   +2 more sources

Acenaphthylene-Based Chromophores for Dye-Sensitized Solar Cells: Synthesis, Spectroscopic Properties, and Theoretical Calculations

ACS Omega
A set of acenaphthylene dyes with arylethynyl π-bridges was tested for dye-sensitized solar cells (DSSCs). Crucial steps for the extension of the conjugated system from the acenaphylene core involved Sonogashira coupling reactions.
Gabriela Malta, João Pina, J. Carlos Lima, A. Jorge Parola, Paula S. Branco   +4 more
doaj   +2 more sources

Crystal structure of (2E)-N-methyl-2-(2-oxo-1,2-dihydroacenaphthylen-1-ylidene)hydrazinecarbothioamide

Acta Crystallographica Section E, 2014
In the title compound, C14H11N3OS, the acenaphthylene ring system and hydrazinecarbothioamide unit (=N—NH—C=S—NH–) are essentially coplanar [with maximum deviations from their mean planes of −0.009 (2) and 0.033 (2) Å, respectively], and make a dihedral ...
G. Vimala, J. Govindaraj, J. Haribabu, R. Karvembu, A. SubbiahPandi   +4 more
doaj   +1 more source

Energetics of the Thermal Dimerization of Acenaphthylene to Heptacyclene

, 2016
The energetics of the thermal dimerization of acenaphthylene to give Z- or E-heptacyclene was investigated. The standard molar enthalpy of the formation of monoclinic Z- and E-heptacyclene isomers at 298.15 K was determined as Δf (E-C24H16, cr) = 269.3
José. N. Canongia Lopes (2650879), Manuel E. Minas da Piedade (1576237), Hermínio P. Diogo (2445574), Carlos E. S. Bernardes (1630036), M. Fátima M. Piedade (2432314), Rui C. Santos (1629967)   +5 more
core   +2 more sources

Crystal structure of 5′′-(4-chlorobenzylidene)-4′-(4-chlorophenyl)-1′-methyltrispiro[acenapthylene-1,2′-pyrrolidine-3′,1′′-cyclohexane-3′′,2′′′-[1,3]dioxane]-2(1H),6′′-dione

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C36H29Cl2NO4, two spiro links connect the methyl-substituted pyrrolidine ring to the acenaphthylene and cyclohexanone rings. The cyclohexanone ring is further connected to the dioxalane ring by a third spiro junction.
Kuppan Chandralekha, Deivasigamani Gavaskar, Adukamparai Rajukrishnan Sureshbabu, Srinivasakannan Lakshmi   +3 more
doaj   +1 more source

Reduktive Alkylierungen von Acenaphthylen und Synthese von Acephenanthrylen

CHIMIA, 1985
The as yet unknown reductive alkylation of acenaphthylene with 1,n-dihalogenoalkanes is investigated. The techniques applied are the direct spectroscopic characterization of the ionic intermediates and the systematic variation of those reaction ...
Gerd Neumann, Klaus Müllen
doaj   +1 more source

Local aromaticity of the five-membered rings in acenaphthylene derivatives

, 2012
In this paper, a detailed study of the local aromaticity in a series of cyclopenta-fused linear polyacenes (acenaphthylene derivatives) was performed using several different criteria of aromaticity.
Bultinck P., Đurđević Nikolić, Jelena, Radenkovic, Slavko   +2 more
core   +2 more sources