CHARACTERIZATION OF THE MU-(ETA(1)-C-ETA(2)-S,S')DITHIOCARBOXYLATE COMPLEXES CP(CO)(2)FE-CS2-ZR(X)CP-2 (X=CL, OCME3) - CS2 INSERTION INTO THE FEZR BOND OF THE HETEROBIMETALLIC COMPLEX CP(CO)(2)FE-ZR(OCME3)CP-2

Treatment of the carbon disulfide adducts FpCS(2)K and Fp'CS2K [Fp' = (eta(5)-C5H4CH3)Fe(CO)(2)] with Cp2ZrCl2 affords the mu-(eta(1)-C: eta (2)-S,S') dithiocarboxylate complexes FpCS(2)ZrClCp(2) (1) and Fp'CS2Z rClCp2 (2). Both stable products were fully characterized. Metathesis between FpCS(2)K and Cp2ZrCl(OCMe3) provided FpCS(2)Zr(OCMe3)Cp-2 (3), which was not obtained analytically pure. This product was characteri zed by comparison of its IR and H-1-, C-13{H-1}-NMR spectral data with that for 1 and 2. The iron-zirconium complex FpZr(OCMe3)Cp-2 (4) was transformed by one equivalent of CS2 to 3 (75% spectroscopic yield), a reaction that did not occur for FpZrClCp(2). An insertion pathway is discussed for incorporating the CS2 into the Fe-Zr bond of FpZr(OCMe3) Cp-2. (C) 1998 Elsevier Science S.A. All rights reserved.