Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 25, Issue 21, Pages 5445-5450Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201901022
Keywords
arsaphosphenes; boranes; catalysis; main-group element; phosphaketenes
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Funding
- Royal Society [NF170051]
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The synthesis and characterization of an (arsino)phosphaketene, As(PCO){[N(Dipp)](CH2)}(2) (Dipp=2,6-diisopropylphenyl) is reported along with its subsequent reactivity with B(C6F5)(3). When reacted in a stoichiometric ratio, B(C6F5)(3) drove the insertion of the P=C bond of the phosphaketene into one of the As-N bonds of the arsino functionality, affording an acid-stabilized, seven-membered, cyclic arsaphosphene. In contrast, when catalytic amounts of B(C6F5)(3) were employed, dimeric species, which formed through a formal [2+2] cycloaddition of the cyclic arsaphosphene, were generated. The cyclic arsaphosphene product represents the first example of such a compound in which the two substituents are arranged in a cis-configuration.
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