3 years ago

Homolytic Cleavage Reactions of a Neutral Doubly Base Stabilized Diborane(4)

Homolytic Cleavage Reactions of a Neutral Doubly Base Stabilized Diborane(4)
Douglas W. Stephan, Levy L. Cao
The neutral doubly base stabilized diborane(4) [C2H2(NCH2C6H4)2CB]2 (3a), featuring an electron-precise B(sp3)–B(sp3) σ bond, was generated by one-electron reduction of the corresponding borenium precursor with Cp*2Co followed by dimerization. Compound 3a reacts with TEMPO, (PhC(O)O)2, PhNO, (tht)AuCl (tht = tetrahydrothiophene), and S8. The resulting species, (C2H2(NCH2C6H4)2CB)(L) (L = ONC5H6Me4 (4), OC(O)Ph (5), PhNO (6), Cl (7)) and [(C2H2(NCH2C6H4)2CB)2(S4)] (8), have been fully characterized and are consistent with homolytic cleavage of the B–B bond in 3a.

Publisher URL: http://dx.doi.org/10.1021/acs.organomet.7b00522

DOI: 10.1021/acs.organomet.7b00522

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