Results 1 to 10 of about 14,789 (141)
Surprising acidity for the methylene of 1,3-indenocorannulenes? [PDF]
Beilstein Journal of Organic ChemistryQuantitative assessment of the first acidity constant (pKa) for BFC (27.6 in CH3CN) and FIC (27.8 in CH3CN) shows the methylene protons to be significantly more acidic than those in related cyclopentadiene (32 in CH3CN), indene (34 in CH3CN), or fluorene
Shi Liu +5 more
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1-Methyl-3-(naphthalen-2-yl)cyclopentadiene
IUCrData, 2023 The title compound, C16H14, an asymmetric naphthyl-/methyl-substituted cyclopentadiene was synthesized and one isomer of five accessible through sigmatropic rearrangement was isolated and characterized by 1H NMR and X-ray diffraction. The crystal packing
Melina Michailidis +1 more
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The QUIJOTE1 line survey of TMC-1 [PDF]
EPJ Web of Conferences, 2022 We present the recent results obtained with the QUIJOTE line survey of the cold dark core TMC-1. The observations have been carried out with the YEBES 40m radio telescope (see Figure 1) in the Q-band (31-50 GHz).
Cernicharo José +7 more
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Molecules, 2022 [n]Helicenes with helically twisted structures have attracted increasing interest owing to their unique properties. Therefore, it has been an important issue to develop facile synthetic methodologies which allow access to a variety of [n]helicenes.
Keisuke Uematsu +4 more
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Nature Communications, 2022 Pericyclase enzymes are an expanding family of enzymes. Here, the authors identify the norbornene synthase SdnG, a pericyclase for the intramolecular Diels-Alder reaction between a cyclopentadiene and an olefinic dienophile to form the sordaricin ...
Zuodong Sun +4 more
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Synthesis and Characterization of Cerium(IV) Metallocenes
Inorganics, 2015 By applying a salt metathesis approach between Ce(OtBu3)2(NO3)2(THF)2 and the potassium salts of mono- and ditrimethylsilyl substituted cyclopentadienes, we were able to isolate two new Ce(IV) metallocenes, including to the best of our knowledge, the ...
Andrew D. Sutton +3 more
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Acta Crystallographica Section E, 2011 The molecule of the title compound, C66H40F6·CH2Cl2, is centrosymmetric; the dihedral angle between the central fluorinated unit and the cyclopentadiene ring is 88.36 (7)°.
Shuhong Li
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Cycloadditions in mixed aqueous solvents: the role of the water concentration [PDF]
, 2005 We examined the kinetics of a series of cycloaddition reactions in mixtures of water with methanol, acetonitrile and poly(ethylene glycol) (MW 1000). The reactions include the Diels–Alder (DA) reaction between cyclopentadiene and N-n-butylmaleimide or ...
Abraham +66 more
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(E)-1-Ferrocenyl-3-(3-nitrophenyl)prop-2-en-1-one
Acta Crystallographica Section E, 2008 In the title compound, [Fe(C5H5)(C14H10NO3)], one cyclopentadiene ring is substituted and one is unsubstituted. The two rings are almost parallel and are eclipsed and ordered.
Yao-Cheng Shi +4 more
doaj +1 more source
Applications of the Conceptual Density Functional Theory Indices to Organic Chemistry Reactivity [PDF]
, 2016 Indexación: Web of ScienceTheoretical reactivity indices based on the conceptual Density Functional Theory (DFT) have become a powerful tool for the semiquantitative study of organic reactivity.
Domingo, Luis R. +2 more
core +2 more sources