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  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Constitution, and X-ray Analysis of 4,4-Bis(1,1-dimethoxy-2,6-diphenyl-λ5-phosphorin-4-ylmethyl)-1-methoxy-1-oxo-2,6-diphenyl-1,4-dihydro-λ5-phosphorinOn experiments to synthesize the carbene 1 or a subsequent product of it by deprotonation of 1,1-dimethoxy-2,6-diphenyl-λ5-phosphorin-4-ylcarbenium tetrafluoroborate (2) with ethyldiiso-propylamine, we isolated bis(1,1-dimethoxy-2,6-diphenyl-λ5-phosphorin-4-yl)methane (6) and another compound, formed from 3 mols of 2. Its constitution as the title compound 9 could be determined only by X-ray analysis. 6 and 9 are formed by addition-elimination in analogy to an aromatic electrophilic substitution: the primary addition product is stabilized by splitting off in case 6 of CH2NR2⊕ (from 5), in case 9 of CH3⊕ (from 7).
    Notes: Der Versuch, 1,1-Dimethoxy-2,6-diphenyl-λ5-phosphorin-4-ylcarbenium-tetrafluoroborat (2) mittels Ethyldiisopropylamin zum Carben 1 oder dessen Folgeprodukte zu deprotonieren, führte zu Bis(1,1-dimethoxy-2,6-diphenyl-λ5-phosphorin-4-yl)methan (6) und einer weiteren, aus 3 mol 2 entstandenen Verbindung. Ihre Konstitution konnte nur durch eine Röntgenstrukturanalyse als die Titelverbindung 9 erkannt werden. 6 und 9 entstehen durch Addition-Elimination analog einer aromatischen elektrophilen Substitution: das primär gebildete Additionsprodukt stabilisiert sich durch Abspaltung bei 6 von CH2NR2⊕ (aus 5), bei 9 von CH3⊕ (aus 7).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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