Zobrazeno 1 - 10 of 98 pro vyhledávání: '"Frederick S. Stephens"'
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The synthesis and structural analysis of cis -β-{(1,6-di(2′-pyridyl)(2,5-dibenzyl-2,5-diazahexane O(1,2-diazahexane))(1,2-benzoquinone diimine))ruthenium(II)} and related complexes
Autor: Peter A. Williams, Janice R. Aldrich-Wright, Ronald F. Fenton, Peter Leverett, Frederick S. Stephens, Robert S. Vagg
Publikováno v: Journal of Coordination Chemistry. 60:2015-2034
Several isomers are possible when N4-tetradentate ligands coordinate to form metal complexes. Here we report the synthesis and structural analysis of cis-β-{[1,6-di(2′-pyridyl)(2,5-dibenzyl-2,5-diazahexane)(1,2-benzoquinone diimine)]ruthenium(II)}
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::56318671956f5f3603e1b55f8f84f4d9
https://doi.org/10.1080/00958970701239598
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2
CHIRAL METAL COMPLEXES. 49. STRUCTURAL STUDIES OF TERNARY Co(III) COMPLEXES OF N,N'-DI (2S-PYRROLIDIN-2-YL)-lS, 2S-DIAMINOCYCLOHEXANE AND α-AMINOACIDS
Autor: Peter A. Williams, Robert S. Vagg, Frederick S. Stephens, Michael A. Cox
Publikováno v: Journal of Coordination Chemistry. 41:275-290
Ternary complexes of the type δ-β1,2−[Co (S,S,S,S,-pychxn)(aa)]2+ where S,S,S,S-pychxn is N,N'-di(2S-pyrrolidin-2-yl)-lS,2S-diaminocyclohexane and aa is an aminoacidate (glyH = glycine, alaH = alanine) have been synthesized and structurally chara
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9365956180d451047aa519ff02e96306
https://doi.org/10.1080/00958979708045505
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3
CHIRAL METAL COMPLEXES. 48. STEREOSELECTIVITY IN TERNARY CO(III) COMPLEXES OF N,N′-DI (2S-PYRROLIDIN-2-YL)-1R, 2R
Autor: Robert S. Vagg, Peter A. Williams, Michael A. Cox, Frederick S. Stephens
Publikováno v: Journal of Coordination Chemistry. 41:291-301
The ternary complexes δ-β1, aδ-β2− and δ-β2− [Co(S,R,R,S-pychxn)(S-ala)]2+ have been synthesised and characterised using electronic and CD spectroscopy and X-ray diffraction methods (S,R,R,S-pychxn= N,N′-di(2S-pyrrolidin-2-yl)-lR, 2R-diam
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7e541d614547e485f6e276816a0dcdc
https://doi.org/10.1080/00958979708045506
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4
Chiral metal complexes 44. Enantiomeric discrimination in ternary cobalt(III) complexes of N,N′-dimethyl-N,N′-di(2-picolyl)-1S,2S-diaminocyclohexane and α-amino acids; including the crystal structure of the S-prolinato complex
Autor: Frederick S. Stephens, Robert S. Vagg, Ronald R. Fenton, Peter A. Williams
Publikováno v: Inorganica Chimica Acta. 236:109-115
When the C2-symmetrical complex Λ-α[Co(S,S-picchxcMe2Cl2]+ (S,S-picchxnMe2 is N,N′-dimethyl-N,N′-di(2-picolyl)-1S,2S-diaminocyclohexane) is reacted with the α-amino acids proline (proH), alanine (alaH) or 2-amino-2-methylpropandioic acid (AMMA
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9110afa1d188f2a5038be83b15c73069
https://doi.org/10.1016/0020-1693(95)04625-j
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CHIRAL METAL COMPLEXES. 45∗. THE STRUCTURE OF CHLORO-{6S,15S-(4R,13R-DIMETHYL)-1,5,10,14 TETRAAZATRICYCLO-[13,3,1,16,10]EICOSANE}COPPER(II)
Autor: Paul D. Newman, Robert J. Lancashire, Robert S. Vagg, Peter A. Williams, Frederick S. Stephens
Publikováno v: Journal of Coordination Chemistry. 34:339-343
The crystal and molecular structure of chloro-{6S,15S-(4R,13R-dimethyl)-1,5,10.14-tetraazatricyclo[13,3,1,16,10]eicosane}copper(II)perchlorate, [Cu(S-mac6)Cl]ClO4, has been determined by X-ray analysis. Crystal data: C18H36N4O4Cl2Cu is orthorhombic,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5484ff2c5c0a79ca8609f88f6c1a3588
https://doi.org/10.1080/00958979508024321
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CHIRAL METAL COMPLEXES. 46∗. THE STRUCTURE OF {6S,14S-(4R,12R-DIMETHYL)-1,5,9,13-TETRAAZATRICYCLO-[12,2,1,16,9]OCTADECANE}PERCHLORATO-COPPER(II) PERCHLORATE
Autor: Robert S. Vagg, Robert J. Lancashire, Paul D. Newman, Frederick S. Stephens, Peter A. Williams
Publikováno v: Journal of Coordination Chemistry. 34:345-350
The crystal and molecular structure of {6S,14S-(4R,12R-dimethyl)-1,5,9,13-tetraazatricyclo[12,2,1,16,9]-octadecane}perchloratocopper(II) perchlorate, [Cu(S-mac5)ClO4]ClO4 has been determined by X-ray analysis. Crystal data: C16H32N4O8Cl8Cl2Cu is mono
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a4d5d2456e3cfd3a355a474f6fe68b71
https://doi.org/10.1080/00958979508024322
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7
Chiral metal complexes 41. Stereoisomerism in palladium(II) complexes of a series of chiral bis-picolyl N4-tetradentate ligands
Autor: Ronald R. Fenton, Peter A. Williams, Robert S. Vagg, Frederick S. Stephens
Publikováno v: Inorganica Chimica Acta. 231:73-85
A series of linear N4 tetradentates based on substituted forms of picen (2,5-diaza-1,6-di(2-pyridyl)hexane) has been synthesized. The square-planar coordination mode of these ligands to palladium(II) was investigated by 1H NMR, chiroptical and crysta
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fcf6fbec73928e83599dd281f6b91929
https://doi.org/10.1016/0020-1693(94)04341-r
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8
Chiral metal complexes 40. The sterically mediated hydrolysis of a coordinated imine
Autor: Peter A. Williams, Michael A. Cox, Robert S. Vagg, Paul D. Newman, Frederick S. Stephens
Publikováno v: Inorganica Chimica Acta. 221:191-196
Reaction of pyridine-2-carboxaldehyde-N-phenylimine (pcp), with Λ-β-[Co(R,R-picchxn)Cl2]+ in aqueous solution (R,R-picchxn=N,N′-di(2-picolyl)-1R, 2R-diaminocyclohexane) results in the formation of a Λ-β-[Co(R,R-picchxn)(pcp)]3+ species, as one
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c14160294ae92ac2b2e0c7ef9e732bd
https://doi.org/10.1016/0020-1693(94)03976-3
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10
Chiral metal complexes 38. Coordination control in complexes of an optically active macrocyclic ligand
Autor: Peter A. Williams, Robert S. Vagg, Robert Edwards, Paul D. Newman, Frederick S. Stephens
Publikováno v: Inorganica Chimica Acta. 204:125-131
The macrocyclic complex [Cu(S-mac)]2+, where S-mac is 6S,16S-(14R,14R-dimethyl)-1,5,11,15-tetraazatricyclo-[14,4,1,16,11]docosane, has been synthesized stereospecifically using a template reaction and reduction of an intermediate diimine. Reduction o
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04c3a0461e330a67443f7b2507a51e57
https://doi.org/10.1016/s0020-1693(00)88121-9
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