Unusual structure-energy correlations in intramolecular Diels–Alder reaction transition states [PDF]
, 2014 Detailed analysis of calculated data from an experimental/computational study of intramolecular furan Diels–Alder reactions has led to the unusual discovery that the mean contraction of the newly forming C-C σ-bonds from the transition state to the ...
Bebbington, Magnus +3 more
core +2 more sources
Pyridine Into Pyrrole Transformation Induced Within the Confinement of the Macrocycle
Angewandte Chemie, EarlyView.This work demonstrates the nontrivial reactivity of pyridine incorporated into a porphyrin framework. The most significant achievement is the contraction of the six‐membered ring to a pyrrole ring, which is a phenomenon of great interest to researchers in this field.
Paulina Krzyszowska +5 more
wiley +2 more sources
Química Nova, 2011 In situ ethylene polymerizations were performed using bis(cyclopentadiene)titanium dichloride supported on polyethersulfone as catalyst. The bis(cyclopentadiene)titanium dichloride supported on polyethersulfone catalyst activity estimated by ethylene ...
Z. V. P Murthy +2 more
doaj +1 more source
Koordinationschemie Perhalogenierter Cyclopentadine und Alkine, XV [PDF]
, 1993 Coordination Chemistry of Perhalogenated Cyclopentadienes and Alkynes, XV[1]. - Systematic Generation of Fivefold Ring-Silylated Cyclopentadienyl Manganese Complexes from [C5Br5]Mn(CO)3.
Blake +12 more
core +1 more source
Bis(ethanol-κO)bis(1-ferrocenyl-4,4,4-trifluorobutane-1,3-dionato-κ2O,O′)nickel(II)
IUCrData, 2021 In the title compound, [NiFe2(C5H5)(C9H5F3O2)2(C2H6O)2], the central NiII ion is observed in an octahedral coordination environment. The chelating β-diketonate ligands are substituted by ferrocene, a lipophilic organometallic moiety. The ferrocene groups
Wenqing Su, Tianyue Fu, Zhongwei Xu
doaj +1 more source
4,5,12,13-Tetrabromo[2.2]paracyclophane - A New Bis(aryne) Equivalent [PDF]
, 1993 The reaction of 2 with nBuLi at -78°C generates aryne intermediates within the aromatic rings of [2.2]paracyclophane which are trapped in Diels-Alder reactions with dienes like furan, 1,9-diphenylisobenzofuran, or cyclopentadiene. Reductive deoxygenation
Knieriem, Burkhard +3 more
core +1 more source
Synthesis and alkyne-coupling chemistry of cyclomanganated 1- and 3-acetylindoles, 3-formylindole and analogues [PDF]
, 2006 The syntheses are reported of new cyclomanganated indole derivatives (1-acetyl-κO-indolyl-κC2)dicarbonylbis(trimethylphosphite)manganese (2), (1-methyl-3-acetyl-κO-indolyl-κC2)tetracarbonylmanganese (4), (3-formyl-κO-indolyl-κC2)tetracarbonylmanganese ...
Depree, Gary J. +4 more
core +2 more sources
Iminium Substituted Acetylenes as Partners in Cycloaddition Reactions
CHIMIA, 1975 The synthesis of acetylenic amidium salts, a new class of compounds, by the alkylation of acetylenic amides is described. In their Diels-Alder cycloaddition reaction with cyclopentadiene, acetylenic amidium salts were found to be more reactive ...
Heinz G. Viehe, Jonathan S. Baum
doaj +1 more source
Coordination Polymers of Polyphenyl-Substituted Potassium Cyclopentadienides
Molecules, 2022 A series of potassium salts of di- and tri-arylsubstituted cyclopentadienes has been obtained by the metalation of the corresponding cyclopentadienes with benzylpotassium in THF media.
Pavel D. Komarov +9 more
doaj +1 more source
Hyperconjugative aromaticity and protodeauration reactivity of polyaurated indoliums
Nature Communications, 2019 Hyperconjugative aromaticity combines the concepts of hyperconjugation and aromaticity and explains cyclopentadiene stability. Here, the authors demonstrate extended hyperconjugative aromaticity in a metallated indole ring, which shows extended electron ...
Kui Xiao, Yu Zhao, Jun Zhu, Liang Zhao
doaj +1 more source