Radical based mediator. Prepn: H. Gilman et al., Chem. Ind. (London) 1965, 848; H. Bürger, W. Kilian, J. Organomet. Chem. 18, 299 (1969). Si-H bond dissociation energies: J. M. Kanabus-Kaminska et al., J. Am. Chem. Soc. 109, 5268 (1987). Identification as reducing agent: C. Chatgilialoglu et al., J. Org. Chem. 53, 3641 (1988). Use as a reducing agent: M. Ballestri et al., ibid. 56, 678 (1991); D. H. R. Barton et al., Tetrahedron Lett. 33, 6629 (1992); in carbonylation: I. Ryu et al., Synlett 1993, 143.