Complexes of C4B2 Rings

Planar diborabenzene and other ligands containing C4B2 rings form r/6-bound metal complexes (Table 5), many of them prepared and characterized by Siebert and co-workers. 

Synthesis and characterization Dinuclear 1,4-diboracyclohexadienene complexes CpNi(//J-H2Me2C4B2Mc2)NiCp (triple-decker) S, H, B, E, MS 133 

Mononuclear diboranaphthalene and related complexes Iron (MeC6H5)Fe( /J-H3C12B2Mc2) (9,10-diboraanthracene) S, X, H, B, C, ESR, E, MS 137 

Dinuclear diboranaphthalene and related complexes Lithium [C2H4(Me2N)2]Li[ 76-H6C8B2(NMe2)2]Li[(Me2N)2C2H4] (2,3-diboranaphthalene S, X, H, B 134 

---