- Photochemical C-P Bond Cleavage of Nitrobenzylphosphonate Ions
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Upon UV-irradiation, the C-P bond of p-nitrobenzylphosphonate ions cleaved with a quantum yield of about 0.7 in an aqueous alcohol solution to give 1,2-bis(4-nitrophenyl)ethane, p-nitrotoluene, orthophosphate, and alkyl dihydrogenphosphate.Whereas in an aqueous solution 1,2-bis(4-nitrophenyl)ethane was produced as a main product, in an alcohol solution only p-nitrotoluene was produced.This photolysis may proceed via intramolecular electron tranfer from PO32- group to nitro aromatic moiety to form an excited state, which undergoes C-P bond cleavage to give p-nitrobenzyl anion and monomeric metaphosphate anion as intermediates.The C-P bond cleavage of p-nitrobenzylphosphonate ion occurred more readily than those of o- and m-nitrobenzylphosphonate ions.
- Okamoto, Yoshiki,Iwamoto, Narimasa,Toki, Susumu,Takamuku, Setsuo
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p. 277 - 282
(2007/10/02)
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