Zobrazeno 1 - 10 of 16 pro vyhledávání: '"Paul R. Challen"'
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Akademický článek
Convenient One-Pot Synthesis of Allylsilanes from Enolizable Ketones
Autor: Man Lung D. Kwan, Paul R. Challen, Quynh D.-D. Tran
Publikováno v: SynOpen, Vol 03, Iss 04, Pp 138-141 (2019)
Abstract A convenient one-pot synthesis of allylsilanes from enolizable methyl aryl ketones has been developed. The first step involves nucleophilic addition of the trimethylsilylmethyl group to ketones using the alkylation method developed by Ishiha
Externí odkaz: https://doaj.org/article/2ef9ca3002534aa7ba7f7d9c7d713974
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2
Convenient One-Pot Synthesis of Allylsilanes from Enolizable Ketones
Autor: Quynh D.-D. Tran, Paul R. Challen, Man Lung D. Kwan
Publikováno v: SynOpen, Vol 03, Iss 04, Pp 138-141 (2019)
A convenient one-pot synthesis of allylsilanes from enolizable methyl aryl ketones has been developed. The first step involves nucleophilic addition of the trimethylsilylmethyl group to ketones using the alkylation method developed by Ishihara with s
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc802079f88437313fd921025870c2c8
http://www.thieme-connect.de/DOI/DOI?10.1055/s-0039-1690335
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3
Synthesis and Characterization of Allylic Dinuclear Molybdenum Complexes with Bridging Oxygen and Sulfur Containing Ligands
Autor: Gerald Henkel, Samer A. Tanash, Paul R. Challen, Saleem A. Al-Ahmad, Mazin Y. Shatnawi
Publikováno v: Bulletin of the Chemical Society of Japan. 83:151-156
Complexes of the type [NEt4][{Mo(CO)2(η3-C3H5)}2(μ-L)3] and [Na(thf)x][{Mo(CO)2(η3-C3H5)}2(μ-L)3] (L = OC2H5, SC2H5, OPh, SPh, OC6H4CH3, and SCH2Ph) were synthesized using two different methods. Th...
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eed022576f9c9171216215d10fc6fbe8
https://doi.org/10.1246/bcsj.20090148
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4
Improved synthesis of pincer ligand precursor, and synthesis and structural characterization of terphenyl scaffolded S–C–S palladium pincer complex
Autor: James B. Updegraff, John D. Protasiewicz, Paul M. Schroder, Thomas F. Spilker, Wilson Luu, Paul R. Challen, Man Lung Desmond Kwan
Publikováno v: Inorganic Chemistry Communications. 12:1171-1174
An easier and more expedient synthesis of 2,6-(BrCH2C6H4)2-4-I-C6H3 (2) is reported. This material allowed easy synthesis of the new pincer ligand precursor 2,6-(4-CH3C6H4SCH2C6H4)2-4-I-C6H3 (3) in 87% yield. Compound 3 reacts with Pd2(dba)3 to give
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b769ec67a628618394e64ba9d7f83c95
https://doi.org/10.1016/j.inoche.2009.08.036
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The spectroelectrochemical, magnetic, and structural characterization of reduced hexaazatriphenylenehexacarbonitrile, HAT(CN)6
Autor: Paul G. Rasmussen, Nathan W. Ockwig, Joseph R. Gallegos, Issouf Ouedraogo, Anthony H. Francis, Paul R. Challen, Raphael G. Raptis
Publikováno v: Synthetic Metals. 159:1667-1671
The cyanoazacarbon, hexaazatriphenylenehexacarbonitrile, or HAT(CN) 6 , is readily reduced and the spectroelectrochemical properties associated with the multiple reductions are described. The singly reduced radical monoanion forms stable salts and we
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::494706804c38de39f330890c14a7a413
https://doi.org/10.1016/j.synthmet.2009.05.004
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A niobium(V) complex with mixed O,S-donor ligands. Synthesis, structure and properties of the anion tris(2-mercapto-4-methylphenolato)niobate(V)
Autor: Diane H. Peapus, Karen A. Magnus, Paul R. Challen
Publikováno v: Polyhedron. 16:1447-1451
Reaction of Nb(OEt)5 with 2-mercapto-4-methylphenol (mmpH2) in the presence of triethylamine gave the mononuclear tris complex (Et3NH)[Nb(mmp)3] which was structurally characterized. The coordination geometry around the niobium is between octahedral
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f5f1071cdc65baeb66f8343cb41ab113
https://doi.org/10.1016/s0277-5387(96)00451-2
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8
Vanadium(IV) Complexes with Mixed O,S Donor Ligands. Syntheses, Structures, and Properties of the Anions Tris(2-mercapto-4-methylphenolato)vanadate(IV) and Bis(2-mercaptophenolato)oxovanadate(IV)
Autor: David B. McConville, Paul R. Challen, Paul R. Klich, Wiley J. Youngs, Andrew T. Daniher
Publikováno v: Inorganic Chemistry. 35:347-356
Reaction of VO(acac)(2) with 2-mercaptophenol (mpH(2)) in the presence of triethylamine gives the mononuclear tris complex (Et(3)NH)(2)[V(mp)(3)] (1), in which the vanadyl oxygen has been displaced. An analogous reaction using 2-mercapto-4-methylphen
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f19e8c07154007cc497e6bd266e526f
https://doi.org/10.1021/ic950792b
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9
One-dimensional chains in sodium tetraphenylphosphonium bis(2-mercapto-4- methylphenolato-O,S)oxo-vanadate(IV)
Autor: Paul R. Challen, Wiley J. Youngs, David B. McConville
Publikováno v: Acta crystallographica. Section C, Crystal structure communications. 56
The title compound, Na(C24H20P)[V(C7H6OS)2O], contains oxovanadium(IV) in a square-pyramidal coordination geometry with a basal plane consisting of a cis-S2O2 donor group. The [VO(mmp)2]2− (mmpH2 = 2-mercapto-4-methyl­phenol) units are linked into
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6173696cf3053431b1ac25323f7d3e19
https://pubmed.ncbi.nlm.nih.gov/10777931
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