Výsledky vyhledávání - "Bernardeta C. Parkin"

Intramolecular activation of aromatic C–H bonds at tantalum(V) metal centers: evaluating cyclometallation ‘resistant’ and ‘immune’ aryloxide ligation

Autor: Janet R. Clark, Jonathan S. Vilardo, Mark A. Lockwood, Bernardeta C. Parkin, Ian P. Rothwell, Phillip E. Fanwick, Linda G. Hanson

Publikováno v: Journal of the Chemical Society, Dalton Transactions. :3353-3362

The trichloride compounds [Ta(OC 6 HPh 2 -2,6-R 2 -3,5)Cl 3 ] (1: R = H a, Ph b, Me c, Pr i d or Bu t e) have been obtained by treating [Ta 2 Cl 10 ] with the corresponding 3,5-disubstituted-2,6-diphenylphenols Ia–Ie. The solid-state structures of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5e542f2062090aad5cf7052c431adfb2
https://doi.org/10.1039/a702325a

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Synthesis and Characterization of a Series of Mononuclear Tantalum(V) Hydride Compounds Containing Aryloxide Ligation

Autor: Valerie M. Visciglio, Bernardeta C. Parkin, Janet R. Clark, Ian P. Rothwell, Phillip E. Fanwick

Publikováno v: Organometallics. 14:3002-3013

In this paper we report on the synthesis, structure and spectroscopic properties of an extensive series of mononuclear hydride compounds of tantalum(V). We find that two synthetic procedures are superior for the formation of hydrido aryloxides in hig

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b6580cad1f1381120fcfc0a67d355584
https://doi.org/10.1021/om00006a051

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Second- and third-row transition-metal complexes of dihydroxybenzoic acids, and the crystal structure of [NMe4]2[MoO2(2,3-dhb)2]·1.5H2O (2,3-H2dhb = 2,3-dihydroxybenzoic acid)

Autor: William P. Griffith, David J. Williams, Richard N. Sheppard, Andrew J. P. White, Bernardeta C. Parkin, Helena I. S. Nogueira

Publikováno v: J. Chem. Soc., Dalton Trans.. :1775-1781

The new complexes [MO2L2]2–(H2L = 2,3- or 3,4-dihydroxybenzoic acid, 2,3-H2dhb or 3,4-H2dhb, M = Mo, W or Os; H2L = 2,6-dihydroxybenzoic acid, 2,6-H2dhb, M = Mo), [OsO2(py)2(2,6-dhb)](py = pyridine), [ReOl(PPh3)2L](H2L = 2,3-, 3,4- or 2,6-H2dhb) an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::151be8f3a87be6d199e4929752abe1f7
https://doi.org/10.1039/dt9950001775

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Intramolecular activation of aromatic C–H bonds by tantalum alkylidene groups: evaluating ‘cyclometallation resistant’ aryloxide ligation

Autor: Janet R. Clark, Bernardeta C. Parkin, Ian P. Rothwell, Mark A. Lockwood

Publikováno v: Chem. Commun.. :1973-1974

The ligands 2,3,5,6-tetraphenylphenoxide and 3,5-dimethyl-2,6-diphenylphenoxide undergo intramolecular aromatic C–H bond activation by tantalum alkylidene groups at rates 20 and 100 times slower than simple 2,6-diphenylphenoxide.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e45292511819ae258eb7861b850977ac
https://doi.org/10.1039/cc9960001973

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A novel hexanuclear heteropolyperoxo oxidation catalyst: preparation, X-ray crystal structure and reactions of [NMe4]3[(MePO3){MePO2(OH)}W6O13(O2)4(OH)2(OH2)]·4H2O

Autor: William P. Griffith, David J. Williams, Andrew J. P. White, Bernardeta C. Parkin

Publikováno v: J. Chem. Soc., Chem. Commun.. :2183-2184

The crystal structure of the title compound, 1, reveals the presence of two distinct types of tungsten atom in which the four bearing peroxo groups have distorted pentagonal-bipyramidal geometries and the remaining two are octahedral; 1 is an effecti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a3e2a9e8ccad02ea9ec33525b84252c5
https://doi.org/10.1039/c39950002183

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The crystal structures of [NMe4][(Me2AsO2){MoO(O2)2}2], [NMe4][(Ph2PO2){MoO(O2)2}2], [NBun 4][(Ph2PO2){WO(O2)2}2] and [NH4][(Ph2PO2){MoO(O2)2(H2O)}] and their use as catalytic oxidants

Autor: Andrew J. P. White, Bernardeta C. Parkin, William P. Griffith, David J. Williams, N. Melanie Gresley

Publikováno v: Journal of the Chemical Society, Dalton Transactions. :2039

The new heteropolyperoxometalate compounds [NMe4][(Me2AsO2){MoO(O2)2}2]1, [NMe4][(Ph2PO2){MoO(O2)2}2]2, [NBun4][(Ph2PO2){WO(O2)2}2]3 and [NH4][(Ph2PO2){MoO(O2)2(H2O)}]4 have been isolated and their crystal structures determined. Compounds 1–3 are d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::008815d3a94d50d1dda48f8be210dca0
https://doi.org/10.1039/dt9960002039

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Heteropolyperoxo- and isopolyperoxo-tungstates and-molybdates as catalysts for the oxidation of tertiary amines, alkenes and alcohols

Autor: William P. Griffith, Alan Bailey, Bernardeta C. Parkin

Publikováno v: Journal of the Chemical Society, Dalton Transactions. :1833

The catalytic oxidation of tertiary amines to the corresponding N-oxides by [XO4{MO(O2)2}4]3–(X = P or As, M = Mo or W) and by [M2O3(O2)4]2– with H2O2 as co-oxidant has been studied. Epoxidation of alkenes and oxidation of alcohols by [M2O3(O2)4]

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::39c9dbb2ec705f7551b77650e216959a
https://doi.org/10.1039/dt9950001833

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The crystal structures of [NMe4]2[(PhPO3){MoO(O2)2}2-{MoO(O2)2(H2O)}] and [NBun 4]2[W4O6(O2)6(OH2)(H2O)2] and their use as catalytic oxidants

Autor: William P. Griffith, David J. Williams, Andrew J. P. White, Bernardeta C. Parkin

Publikováno v: Journal of the Chemical Society, Dalton Transactions. :3131

The new trinuclear heteropolyperoxo complexes [NMe4]2[(RPO3){MO(O2)2}2{MO(O2)2(H2O)}](R = Ph, M = Mo 1 or W 2) have been isolated and the crystal structure of the molybdenum complex is reported. A series of analogous molybdenum complexes (R = Me, Et,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ff62b954e96b463c95a14df4e754c9f
https://doi.org/10.1039/dt9950003131

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Studies on polyoxo- and polyperoxo-metalates. Part 1. Tetrameric heteropolyperoxotungstates and heteropolyperoxomolybdates

Autor: William P. Griffith, Bernardeta C. Parkin, Andrew C. Dengel

Publikováno v: Journal of the Chemical Society, Dalton Transactions. :2683

New heteropolyperoxometalates of the type R3[XO4{MO(O2)2}4][R = N(C6H13)4+, N(PPh3)2+ or ⅓[Co(en)3]3+(en = ethane-1,2-diamine); X = P or As; M = Mo or W] have been characterized by IR, Raman and where appropriate 31P NMR spectroscopy. Epoxidation o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5401c0f5c2a6bbac5b262e4bc66210c2
https://doi.org/10.1039/dt9930002683

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