Zobrazeno 1 - 10 of 31 pro vyhledávání: '"Karel Baše"'
1
Polyhedral organoiridaazaborane chemistry. The preparation of the eleven-vertex nido compound [9-Cl-8-(η5-C5Me5)-nido-8,7-IrNHB9H10] and its characterization by single-crystal X-ray diffraction analysis and nuclear magnetic resonance spectroscopy
Autor: Karel Baše, Karl Nestor, John D. Kennedy, Mark Thornton-Pett, Bohumil Štíbr, Xavier L. R. Fontaine
Publikováno v: Collection of Czechoslovak Chemical Communications. 56:1607-1617
Reaction between nido-6-HNB9H11 (from[9-(MeNC)-arachno-6-HNB9H11] and [(η5-C5Me5).IrCl2]2 in the presence of N,N,N’,N’-tetramethylnaphthalene-1,8-diamine) gives [9-Cl-8-(η5-C5Me5)-nido-8,7-IrNHB9H10] as a yellow crystalline solid in 40% yield.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::83b5dd6cd943fa95c6a2f96058bfc426
https://doi.org/10.1135/cccc19911607
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2
Polyhedral platinadicarbaborane chemistry. The molecular structure and some NMR properties of [9,9-(PPh3)2-arachno-9,5,6-PtC2B7H11]
Autor: John D. Kennedy, Xavier L. R. Fontaine, Bohumil Štíbr, Mark Thornton-Pett, Tomáš Jelínek, Karel Baše
Publikováno v: Collection of Czechoslovak Chemical Communications. 56:646-656
The reaction of [Pt(PPh3)4] with [arachno-4,5-C2B7H13] in benzene solution at room temperature yields the arachno ten-vertex platinadicarborane [9,9-( PPh3)2-arachno-9,5,6-PtC2B7H11] as white air-stable needles (80%). Crystals are monoclinic, space g
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d8c8f1a9f4aa6edcb7caac9f65e6a332
https://doi.org/10.1135/cccc19910646
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3
Polyhedral iridamonocarbaborane chemistry. Two ten-vertex arachno-6,9-iridacarbadecaboranes and some related ten-vertex carbaborane chemistry. Comparative nuclear magnetic resonance studies and the molecular structure of [asym-9-(CO)-9,9-(PPh3)2-9-H-arachno-9,6-IrCB8H12]
Autor: John D. Kennedy, Bohumil Štíbr, Karel Baše, Mark Thornton-Pett, Xavier L. R. Fontaine, Karl Nestor, Tomáš Jelínik
Publikováno v: J. Chem. Soc., Dalton Trans.. :2887-2894
Reaction of trans-[IrCl(CO)(PPh3)2] with [NMe4][nido-6-CB9H12] in solution resulted in the formation in low yields of two isomers (sym and asym) of [9-(CO)-9,9-(PPh3)2-9-H-arachno-9,6-IrCB8H12]. These new air-stable yellow compounds differ in the arr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b88ffadd61d14befeda7de3e4ae8989b
https://doi.org/10.1039/dt9900002887
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5
The partition of amines between water and an organic solvent phase
Autor: Zdeněk Samec, Vladimír Mareček, Hartmut Wendt, Karel Baše, Daniel Homolka
Publikováno v: Journal of Electroanalytical Chemistry and Interfacial Electrochemistry. 163:159-170
The partition of a series of protonated amines (aniline, benzylamine, 2-phenylethylamine and related compounds) between water and nitrobenzene was investigated using electrochemical approaches (cyclic voltammetry and differential pulse stripping volt
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a8dbc4a445a343e225dac0eecdb17795
https://doi.org/10.1016/s0022-0728(84)80049-2
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6
Preparation, properties and structure of some intermediate nido- and arachno-monocarbaboranes
Autor: Karel Baše, Josef Duben, Bohumil Štíbr, Jiří Dolanský
Publikováno v: Collection of Czechoslovak Chemical Communications. 46:2345-2353
The 6-N(CH3)3-6-CB9H11 carbaborane reacts with sodium in liquid ammonia with the formation of 6-CB9H12- which was used as a starting compound for preparing the 4-CB8H14, 9-L-6-CB9H13 (L = (CH3)2S, CH3CN and P(C6H5)3), 1-(η5-C5H5)-1,2-FeCB9H10-, and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41d4c70fc3fc23269213573cedc250c3
https://doi.org/10.1135/cccc19812345
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8
Synthesis of ten-vertex closo-metallacarbaboranes from 4-CB8H14
Autor: Bohumil Štíbr, Karel Baše, Zbyněk Janoušek, Lev A. Butman, N. T. Kuznetsov, Jaromír Plešek, Igor I. Kuznetsov, Konstantin Solntsev
Publikováno v: Collection of Czechoslovak Chemical Communications. 49:1660-1664
Nickelocene and 4-CB8H13-Na+ react in diglyme at 130-140 °C to produce an unstable [6-η5-C5H5Ni-η5-1-CB8H9] complex which rearranges to the isomeric [10-η5-C5H5Ni-η4-1-CB8H9] species. Modification of the synthesis led to the isolation of a bimet
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2b91fa26539aa2ca8b6f89dfbfa5d94b
https://doi.org/10.1135/cccc19841660
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9
Synthesis and structure of μ-6,9-metalla-bis(ligand)-6,9-dicarba-nido-decarboranes(10) from the [6,9-C2B8H10]2- anion
Autor: Bohumil Štíbr, Karel Baše, Jaromír Plešek, Stanislav Heřmánek, Inessa A. Zakharova, Zbyněk Janoušek
Publikováno v: Collection of Czechoslovak Chemical Communications. 49:1891-1894
A revised structure for the [6,9-C2B8H10]2- anion is siggested on the basis of its NMR spectra. The anion reacts with the [cis-PtL2CL2] (L = P(C6H5)3, S(C2H5)2) and [Ni(cis-1,2-DACH)..Cl2] (DACH = diaminocyclohexane) complexes to produce a family of
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f4cc57a53ac7f85be391ca5846afc413
https://doi.org/10.1135/cccc19841891
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10
Potential uses of metallocarborane sandwich anions for analysis, characterization and isolation of various cations and organic bases
Autor: František Mareš, Bohumil Štíbr, Jaromír Plešek, Stanislav Heřmánek, F. Hanousek, Karel Baše
Publikováno v: Collection of Czechoslovak Chemical Communications. 49:2776-2789
Unique properties of metallocarborane sandwich anions of the type [(C2B9H11)2M(III)]- as chemical stability, specific reactivity, very strong acidity of conjugated acids along with an extreme organophility of their salts and a very limited solubility
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52ff884ee72d3185bbc71aac6166a60f
https://doi.org/10.1135/cccc19842776
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