Notes. Oxidation and reduction of phosphorus–phosphorus and arsenic–arsenic double bonds. An electrochemical study of two diphosphenes and a diarsene
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 1,p. 249-251
- https://doi.org/10.1039/dt9870000249
Abstract
The diphosphenes [(Me3Si)3C]2P2(1) and (2,4,6-But 3C6H2)2P2(2) and the diarsene [(Me3Si)3C]2As2(3) undergo electrochemical reduction in tetrahydrofuran (thf) solution to the corresponding anion radicals [{(Me3Si)2C}2P2]˙–(4), [(2,4,6-But 3C6H2)2P2]˙–(5), and [{(Me3Si)3C}2As2]˙–(6), respectively. Anion radicals (4) and (5) were sufficiently stable to permit the acquisition of e.s.r. data. The products of oxidation of (1), (2), and (3) were much more difficult to characterise. The oxidation of (1) in CH2Cl2, is irreversible at 25 °C; however, at –75 °C a one-electron oxidation occurs to the unstable cation radical [{(Me3Si)3C}2P2]˙+. The oxidation of both (2) and (3) is irreversible even at –75 °C.Keywords
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