Photolysis tetraphenylborates

During the photolysis of a-diazophosphonium salts, the skeletons of the reactants are preserved. Excluding a plausable Wolff rearrangement, only the O/H insertion product of the carbene with the solvents can be obtained. Diazophosphonium tetrafluoroborate (6), formed by UV irradiation in methanol under a nitrogen atmosphere and subsequent anion exchange with sodium tetraphenylborate, yields the stable (2-methoxy-2-oxopropyl)-triphenylphosphonium tetraphenylborate (7) (equation 4)31. 

The bulkier ( L)Fe3(THF) system mediated a number of multi-electron processes that are potentially relevant to Nj activation. A triiron p -nitride, ]( L)Fe3(p -N)](Bu4N), with a formal Fej core, was generated by adding 1 equiv. (Bu NKNj) to ( L)Fe3(THF) [29]. This transformation was unusually facile at room temperature and did not require photolysis or heating, which are typically needed to extrude Nj from a metal-azide intermediate. The functionalization of the capping nitride was performed with either Mel or lutidinium tetraphenylborate to give the FCj p -imide complex,... 

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