Výsledky vyhledávání - "Leslie H. Randall"

Water penetration in nylon 6,6: Absorption, desorption, and exchange studied by NMR microscopy

Autor: Nick E. Burlinson, Leslie H. Randall, Colin A. Fyfe

Publikováno v: Journal of Polymer Science Part A: Polymer Chemistry. 31:159-168

The uptake of water by nylon 6,6 [42DB Adipure (trade name of Dupont Canada Inc.)] at 100°C has been monitored by a combination of one-dimensional proton NMR spectroscopy, relaxation time (T1 and T2) measurements and proton microscopic NMR imaging t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0ed0a3b2f2896c497579ce269fdda622
https://doi.org/10.1002/pola.1993.080310119

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Solid-state31P NMR investigations of unsaturated phosphorus-nitrogen-sulfur rings

Autor: M Edwards, Tristram Chivers, Colin A. Fyfe, Leslie H. Randall

Publikováno v: Magnetic Resonance in Chemistry. 30:1220-1223

Solid-state CP/MAS 31P NMR spectra were measured for the following unsaturated phosphorus–nitrogen–sulfur ring systems: 1,5-R4P2N4S2 (R = Me, Et, Ph), 1,5-Ph4P2N4S2Ph2, Ph2PN4S3NPPh3 and Ph2PN3S2. The isotropic solid-state shifts correlate well w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::96bcb7c5fef3f708f8e003c70c54eb53
https://doi.org/10.1002/mrc.1260301211

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Competitive nucleophilic attack between carbon and metal atoms in bridging hydrocarbyls: x-ray structures of Fe2(CO)5(.mu.-PPh2)[.mu.-C:C(Ph)PPh2CH2PPh2], a novel zwitterionic vinylidene complex, and Fe2(CO)4(.mu.-PPh2)(.mu.2-.eta.2-C.tplbond.CCHMe2)(.mu.-Ph2PCH2CH2PPh2), a diphosphine-bridged acetylide

Autor: Leslie H. Randall, Simon Doherty, Susan M. Breckenridge, Arthur J. Carty, Nicholas J. Taylor, Andrew A. Cherkas, Michael Cleroux, Graeme Hogarth

Publikováno v: Organometallics. 11:1701-1711

The sigma-pi acetylide complex Fe2(CO)6(mu-PPh2)(mu(2)-eta(2)-C = CPh) (1A) reacts with the diphosphines bis(diphenylphosphino)methane (dppm) and bis(diphenylphosphino)ethane (dppe) to yield Fe2(CO)5(mu-PPh2)[mu-C = C (Ph)PPh2CH2PPh2] (2A) and Fe2(CO

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a00890d275d98e70be8cee82cccb0c1
https://doi.org/10.1021/om00040a047

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Observation of heterogeneous trace (0.4% w/w) water uptake in bisphenol A polycarbonate by NMR imaging

Autor: Nick E. Burlinson, Leslie H. Randall, Colin A. Fyfe

Publikováno v: Chemistry of Materials. 4:267-271

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba224101478b1cead05799f0d3119e4d
https://doi.org/10.1021/cm00020a010

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Reactivity patterns for multisite-bound acetylides. Nucleophilic attack at the .alpha.-carbon in .mu.2-.eta.2-acetylides. Bridging 2-amino-1-metallaphenethylidene complexes via addition of primary amines to M2(CO)6(.mu.2-.eta.2-C.tplbond.CPh)(.mu.-PPh2) (M = Fe, Ru, Os)

Autor: Graham N. Mott, Nicholas J. Taylor, Jean Luc Guinamant, Leslie H. Randall, Andrew A. Cherkas, John E. Yule, Arthur J. Carty

Publikováno v: Organometallics. 9:1677-1685

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba9ef16cdcfa62b39c6b42cd5b6074e5
https://doi.org/10.1021/om00119a046

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Novel phosphido-bridged cations [M2(CO)8(.mu.-PPh2)]BF4 (M = iron, ruthenium): synthesis, reactivity, and x-ray structure of an isoelectronic and structural analog of Ru2(CO)9

Autor: Nicholas J. Taylor, Susan M. Breckenridge, Shane A. MacLaughlin, Arthur J. Carty, David J. Witter, Leslie H. Randall, Andrew A. Cherkas

Publikováno v: Organometallics. 9:2636-2638

The cationic 34-electron phosphido-bridged binuclear complexes (M{sub 2}(CO){sub 8}(PPh{sub 2}))BF{sub 4} (1, M = Fe; 2, M = Ru) have been synthesized and their electrophilic reactivities explored. An X-ray analysis of 2 has revealed it to be a struc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::68b3f11526cb3d871482501d8815a249
https://doi.org/10.1021/om00160a002

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Carbon-13 NMR shifts of bridging acetylides in polynuclear complexes

Autor: Leslie H. Randall, Arthur J. Carty, Andrew A. Cherkas

Publikováno v: Polyhedron. 7:1045-1052

Carbon-13 NMR data for a range of iron group polynuclear acetylide complexes with μ 2 -η 2 , μ 3 -η 2 and μ 4 -η 2 alkynyl groups are presented. For doubly bridging μ 2 -η 2 -acetylides of Fe, Ru and Os, the C α resonance lies in the range 6

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bbf6fafb64ff673d4265f9bae4d7eca0
https://doi.org/10.1016/s0277-5387(00)86324-x

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