Výsledky vyhledávání - "Roger Nassar"

Stereoselective synthesis of enones from the reaction of aldehydes with sterically hindered dimethylaluminum enolates

Autor: Roger Nassar, Kenneth W. Henderson, J. Jacob Morris, Zachary S. Sales

Publikováno v: Journal of Organometallic Chemistry. 690:3474-3478

The equimolar reaction between Me3Al and the methyl ketones (2,4,6-R3–C6H2)C(O)CH3, where R = Me or iPr, results in exclusive formation of the enolization products [{Me2AlOC(2,4,6-R3–C6H2) CH2}2], 1 and 2, upon heating to reflux temperature in to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7100a869f1db8277d353bd0a980bd410
https://doi.org/10.1016/j.jorganchem.2005.04.040

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Solid-state studies of the Horner–Wittig reagent [{{Ph2P(O)}2CHLi·(THF)}2·THF] and its mixed-anion intermediate [{{Ph2P(O)}2CHLi}4·{Ph2P(O)2Li} 2·8C6H6] formed by reaction with dioxygen

Autor: Bruce C. Noll, Roger Nassar, Kenneth W. Henderson

Publikováno v: Polyhedron. 23:2499-2506

Reaction of Ph2P(O)2CH2 with one equivalent of RLi (R = Me, Bu) leads to monodeprotonation of the methylene bridge and formation of a Horner–Wittig type reagent. The crystal structure of the resulting lithium complex [{{Ph2P(O)}2CHLi · (THF)}2 ·

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9dbd6e2c1df4ac3169025971748a8f9e
https://doi.org/10.1016/j.poly.2004.08.017

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Sodiated β‐Diphosphonate Carbanions: Characterization of the Tetrameric Cubane and the Hexameric Ladder Complexes [{( i PrO) 2 P(O)} 2 CHNa] 4 and [{(EtO) 2 P(O)} 2 CHNa] 6

Autor: Kenneth W. Henderson, Roger Nassar, Alicia M. Beatty

Publikováno v: European Journal of Inorganic Chemistry. 2003:3325-3331

Reaction of the methylene diphosphonates [(RO)2P(O)]2CH2, where R = iPr or Et, with the metalating reagents NaH, nBuNa or the superbasic mixture tBuONa/nBuLi leads to monodeprotonation, and formation of the complexes [{(iPrO)2P(O)}2CHNa]4 (1) and [{(

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d44d56b8e7d3174f5b03b74222397812
https://doi.org/10.1002/ejic.200300258

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A new synthetic route to [MF(μ-F)(CO)3]4 (M=Ru, Os) and their reactivity with P(C6H4-4-X)3 (X=OCH3, OH) and P(C6H4-2-OH)3

Autor: John H. Holloway, Eric G. Hope, Roger Nassar, John Fawcett, Karl S. Coleman

Publikováno v: Journal of Fluorine Chemistry. 112:185-189

The reaction of [M 3 (CO) 12 ] (M=Ru, Os) with elemental fluorine in anhydrous HF offers a clean, convenient route to [MF(μ-F)(CO) 3 ] 4 . This tetramer reacts with Tris– ortho -hydroxyphenyl phosphine, with the elimination of HF, to give a new, m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4802f00d617ce92f8cfb8cd23656e912
https://doi.org/10.1016/s0022-1139(01)00509-7

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Characterization of a kinetically stable, highly ordered, octameric form of lithium tert-butoxide and its implications regarding aggregate formation

Autor: Alicia M. Beatty, Nathalie Calin, Elizabeth Specht, John F. Allan, Kenneth W. Henderson, Roger Nassar

Publikováno v: Journal of the American Chemical Society. 126(2)

The controlled reaction of molecular oxygen with hydrocarbon solutions of tBuLi results in the unexpected formation of the octameric species [(tBuOLi)8], 18. Single-crystal X-ray diffraction studies indicate that the connectivity within 18 correspond

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5af98dd3b97d1bac20a9c1db4473750a
https://pubmed.ncbi.nlm.nih.gov/14719943

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Bis[μ2-bis(diphenylphosphinoyl)methanido-κ2O:O′]hexamethyldi-μ3-oxo-tetraaluminium(III) tetrahydrofuran disolvate

Autor: Roger Nassar, Kenneth W. Henderson, Bruce C. Noll

Publikováno v: Acta Crystallographica Section E Structure Reports Online. 60:m1023-m1024

The title centrosymmetric alumoxane compound, [Al4(CH3)6(μ3-O)2(μ-{Ph2P(O)}2CH)2]·C4H8O, is dimeric in the solid state as its THF disolvate, with a central Al2O2 ring core connected to terminal Me2Al units through oxo and non-chelating phosphinate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::23eca1c123a57fbdd81c452408730095
https://doi.org/10.1107/s1600536804011523

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