Group 4 Element Compounds Ti, Zr, Hf

A few chalcogenocarboxylato complexes of titanium are known, R2Ti(RCOS) [8,42] and Cp2Ti(RCOS)2 [Cp =(CH3)C5H4] [7], which can be synthesized by reacting R2TiCl (Cp or indenyl) with sodium thiocarboxylate or Cp2TiCl2 with sodium thiocarboxylate, respectively. Their detailed structures are not yet fully known. 

There are no previous reports concerning the synthesis of chalcogenocar-boxylic acid hafnium complexes. 

---