Zobrazeno 1 - 10 of 18 pro vyhledávání: '"Witold K. Rybak"'
1
Asymmetric autocatalysis: crystallization-induced highly enantioselective synthesis of a conglomerating oxo-rhenium(V) complex
Autor: Witold K. Rybak
Publikováno v: Tetrahedron: Asymmetry. 19:2234-2239
Experiments designed to elucidate the mechanistic foundation and origins of enantioselectivity in a symmetry breaking synthesis are described. The autocatalytic enantioselective preparation of the title complex cis -[ReOCl 2 (P ∼ O)py] [py = pyridi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5d7c75d60fab2d6a2f83e96fcdc68249
https://doi.org/10.1016/j.tetasy.2008.09.019
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2
Oxo‐Entity‐Controlled Diastereomer Peculiarity of Rhenium( V ) Complexes ReOX 2 (P~O)py [X = Cl, Br, I; P~O = (OCMe 2 CMe 2 O)POCMe 2 CMe 2 O(1–); py = pyridine]: Synthesis and Molecular and Crystal Structural Characterization
Autor: Witold K. Rybak, Ludmiła Szterenberg, Zbigniew Ciunik, Anna Skarżyńska, Tadeusz Głowiak
Publikováno v: European Journal of Inorganic Chemistry. 2005:4964-4975
The stability of diastereomers of ReOX2(P~O)py complexes determined by the arrangement of the oxo-entity O=Re(–O~P) is manifested in molecular recognition and crystallization behavior [X = Cl, Br, I; P~O = (OCMe2CMe2O)POCMe2CMe2O(1–); py = pyridi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76d816b042567c2b0feee8cbe0704ac2
https://doi.org/10.1002/ejic.200500434
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3
Oxo-rhenium(V) complexes containing bridging phosphito ligands. The synthesis, characterisation and X-ray crystal structures of [ReOCl{μ-OP(OR)2}{OCMe2CMe2OP(OCMe2CMe2O)}]2 (R=Me or CMe2)
Autor: Tadeusz Głowiak, Witold K. Rybak, Anna Skarżyńska
Publikováno v: Polyhedron. 20:2667-2674
The oxo-rhenium(V) complexes [ReOCl2(P∼O)L] (P∼O=(OCMe2CMe2O)POCMe2CMe2O−), L=py (1), PPh3 (2) or OPPh3 (3)) react with P(OMe)3 or spirophosphorane HP(OCMe2CMe2O)2 (HP∼O) affording the related μ-phosphito(1−) bridged dimeric compounds [ReO
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e15f6b5fe05afb8c87c9bcc222c56465
https://doi.org/10.1016/s0277-5387(01)00881-6
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4
Synthesis and structural characterisation of the oxo-rhenium(V) complexes with spirophosphorane derived bidentate ligand (P∼O−). Crystal structure of trans-ReOCl2[OCMe2CMe2OP(OCMe2CMe2O)](PPh3)
Autor: Witold K. Rybak, Tadeusz Głowiak, Anna Skarżyńska
Publikováno v: Polyhedron. 19:2667-2672
The reactions of ReO(OEt)Cl2L2, L=py, PPh3 or ReOCl3(Me2S)(OPPh3), with spirohydrophosphorane HP(OCMe2CMe2O)2 – abbreviated here as HP∼O – in toluene yield ReOCl2(P∼O)L complexes, L=py (1), PPh3 (2) and OPPh3 (3), respectively. The encountere
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a858eb60f6220c9d4aed2903b55b5ff7
https://doi.org/10.1016/s0277-5387(00)00582-9
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5
Synthesis and characterization of oxo-rhenium(V) complexes with monodentate P(OCH 3 ) 3 and bidentate [OC(CH 3 ) 2 C(CH 3 ) 2 O]POC(CH 3 ) 2 C(CH 3 ) 2 OP[OC(CH 3 ) 2 C(CH 3 ) 2 O] phosphite ligands
Autor: Anna Skarżyńska, Witold K. Rybak, Tadeusz Głowiak
Publikováno v: Polyhedron. 17:3153-3160
The reactions of ReOCl 3 (Me 2 S)(OPPh 3 ) with monodentate P(OMe) 3 (P) and bidentate (OCMe 2 CMe 2 O)POCMe 2 CMe 2 OP(OCMe 2 CMe 2 O), (P–P) phosphites afford fac- ReOCl 3 P 2 (1) and fac -ReOCl 3 (P–P) (2) respectively. Both blue–violet 1 an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::be9c19f31d5e732b7b311d6463ba5c44
https://doi.org/10.1016/s0277-5387(98)00091-6
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6
Enantiomeric enrichment of a nonracemic conglomerate of a chiral oxo-rhenium(v) complex
Autor: Witold K. Rybak, Anna Skarżyńska
Publikováno v: New J. Chem.. 27:1687-1689
The enantiomer being in excess was readily recovered from a nonracemic conglomerate of chiral cis-[ReOCl2{OCMe2CMe2OP(OCMe2CMe2O)}py] by means of a difference in solubility between the enantiomer and the racemate; subsequently the solubility diagram
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f21e3e1131b9a02a37075def41f8a2db
https://doi.org/10.1039/b308170b
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8
Synthesis, Structure and Catalytic Activity of An Oxorhenium(V) Complex Containing Chelating Phosphite Ligand
Autor: Anna Zagiczek, Witold K. Rybak
Publikováno v: Journal of Coordination Chemistry. 26:79-82
The new violet oxorhenium(V) complex ReOCl3(pinacop) {pinacop = (OCMe2CMe2O)POCMe2CMe2OP (OCMe2CMe2O)} was obtained by reaction of ReOCl3(OPPh3)(SMe2) with a stoichiometric amount of pinacop. Facial geometry was determined by spectroscopic means and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2bb51a122c0b17b717a12db45754b54
https://doi.org/10.1080/00958979209407915
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10
Tuning enantioselectivity for crystallization-induced asymmetric synthesis of a conglomerating oxo-rhenium(v) complex
Autor: Anna Skarżyńska, Witold K. Rybak
Publikováno v: New Journal of Chemistry. 36:1966
Crystallization-induced asymmetric synthesis of conglomerates could be an innovative and powerful tool in the enantioselective preparation of compounds without any chiral auxiliaries but with requirement of appropriate adjustment of the reaction cond
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::43188271cf898f98ccc1014051499c00
https://doi.org/10.1039/c2nj40510e
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