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  • 1
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 963-966 
    ISSN: 0009-2940
    Schlagwort(e): 9-Fluorenyl(2,2,6,6-tetramethylpiperidino)borane ; (9-Bromo-9-fluorenyl)(2,2,6,6-tetramethylpiperidino)boron bromide ; 1,2-Oxaboretane derivative ; 1,2,4,3-Trithiaborolane derivative ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Contributions to the Chemistry of Boron, 2031 Reactions of Some Non-Metallic Elements with 9-Fluorenylidene(2,2,6,6-tetramethylpiperidino)borane9-Fluorenylidene(2,2,6,6-tetramethylpiperidino)borane (1) is hydrogenated catalytically at its boron-carbon double bond producing 9-fluorenyl(2,2,6,6-tetramethylpiperidino)borane (2). Similarly, chlorine, bromine, and iodine add to this double bond, but only the bromine adduct 6a has been fully characterized. 1 is oxygen-sensitive. The oxidation product found is the 1,2-oxaboretane derivative 7, which is prepared independently by a [2 + 2] cycloaddition reaction from 1 and 9-fluorenone. Sulfur reacts with 1 to yield a trithiaborolane derivative, while P4 does not attach 1.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 611-618 
    ISSN: 0009-2940
    Schlagwort(e): Phosphanylboranes, tetraorganyl ; 1,3,2,4-Diphosphadiboracyclobutane ; Diboranes, μ1-phosphanyl- ; Thiophosphinate, S1-boryl ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Contributions to the Chemistry of Boron, 215[1]. - Synthesis and Reactions of Monomeric Tetraorganyl-phosphanyl-boranesThe reaction of diorganyl-chloroboranes with lithium diorganyl-or lithium bis(trimethylsilyl)phosphides leads to the monomeric phosphanylboranes tBu2BPtBu2 (1), tBu2BP(SiMe3)2 (2), 9-BBNPtBu2 (3), 9-BBNP(SiMe3)2 (4), and Cy2BPtBu2 (5). These species were studied by NMR-spectroscopic methods. For further characterization reactions of the compounds 1, 3, and 5 have been investigated. Heating of 1 and 5 results in the formation of the dimeric phosphanylboranes tBu(H)BPtBu2 (8) and Cy(H)BPtBu2 (9) by dehydroboration. Dimers 8 and 9 are present as cis- and trans1-isomers as confirmed by X-ray structure analyses. The trans1-isomer of 9 shows a planar (BP)2 four-membered ring, whereas the ring of the cis1-isomer of 8 is slightly folded. Furthermore, the reaction of 3 with 9H-9-BBN yields (μ1-H)(μ-tBu2P)[9-BBN]2 (14), whose bridged structure is proven by a crystal structure analysis. Oxidation of the phosphorus atom in 3 with sulfur leads to the S1-boryl thiophosphinate tBu2(S)PS-9-BBN (16).
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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