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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1137-1142 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 9-(Organothio)-9-borabicyclo[3.3.1]nonanes  -  Preparation and CharacterizationThe 9-RS-9-BBN compounds [R = CH3 (1a), C2H5 (1b), CH(CH3)2 (1c), C(CH3)2 (1c), C(CH3)3 (1d), C6H5 (1e), —CH2CH2— (1f)] are prepared from 9-Cl-9-BBN with LiSR (1a, b, d, e) or from (9-BBN)2 with HSR (1c, f). All 9-RS-9-BBN compounds are monomeric in solution at room temperature (11B NMR). At or below room temperature two sets of signals for the α-C- and β-C atoms of the C8H14B bicyclic ring are observed in the 13C-NMR spectra of 1a-c and f (hindered rotation around the BS bond). (1a)2 is a dimer in the solid state (X-ray analysis). The mixed dimers 1a-9-BBN and 1b-9-BBN are formed in solution from 1a or 1b with (9-BBN)2 (MS, 11B NMR). (1a)2 reacts with AlCl3, pyridine, or trimethylphosphane to form the crytalline 1:1-addition compounds 1a-AlCl3, Py-1a, and TMP-1a, respectively.
    Notes: Die 9-RS-9-BBN-Verbindungen [R = CH3 (1a), C2H5 (1b), CH(CH3)2 (1c), C(CH3)2 (1c), C(CH3)3 (1d), C6H5 (1e), —CH2CH2— (1f)] werden aus 9-Cl-9-BBN mit LiSR (1a, b, d, e) oder aus (9-BBN)2 mit HSR (1c, f) hergestellt. Sämtliche 9-RS-9-BBN-Verbindungen sind in Lösung bei Raumtemperatur monomer (11B-NMR). Die α-C- und β-C-Resonanzen des C8H14B-Bicyclus sind in den 13C-NMR-Spektren von 1a-c und f bei bzw. unterhalb Raumtemperatur in jeweils zwei Sätze aufgespalten (behinderte Rotation um die BS-Bindung). Vom festen Dimeren (1a)2 liegt eine Röntgenstruktur-analyse vor. Die gemischten Dimeren 1a-9-BBN und 1b-9-BBN bilden sich in Lösung aus 1a bzw. 1b mit (9-BBN)2 (MS, 11B-NMR-Spektren). (1a)2 reagiert mit AlCl3, Pyridin oder Trimethylphosphan unter Bildung der kristallisierten 1:1-Additions-verbindungen 1a-AlCl3, Py-1a bzw. TMP-1a.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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