Scandium, Yttrium and the 4f and 5f Elements, Excluding their Zero Oxidation State Complexes (F.T. Edelmann). Zero Oxidation State Complexes of the Group 3 and 4 Metals and the 4f and 5f Elements (F.G.N. Cloke). Titanium Complexes (M. Bochmann). Cationic Organozirconium and Organohafnium Chemistry (R.F. Jordan). Bis(Cyclopentadienyl) Metal Compounds with Si, Ge, Sn, O, S, Se, N, P, As, Sb or Transition Metal Centered Ligands (E. Hey-Hawkins). Mono-, Tri-, and Tetracyclo-pentadienyls of Zr/Hf in the +4 Oxidation State (S. Gambarotta). Metallocene(II) Complexes of Zirconium and Hafnium (B. Binger, S. Podubrin). Organozirconium(III) and Hafnium(III) Precursors (E. Ryan).