Synthesis and molecular structures of heterometallic complexes [RC5H4Fe(CO)(2)](2)Sn(TePh)(2) and their adducts with chromium and tungsten carbonyls or with trimethylplatinum iodide

Complexes [RC5H4Fe(CO)(2)](2)Sn(TePh)(2) (R = Hi, Me) containing stable het erometallic Fe-Sn-Fe fragments with two phenyltellurium groups at the tin a tom were synthesized from [RC5H4Fe(CO)(2)](2)SnCl2 (R = H, Me) and sodium p henyltelluride and their structures were established by X-ray analysis. The ir chelates with tungsten tetracarbonyl, [RC5H4Fe(CO)(2)](2)Sn(TePh)(2)[W(C O)(4)] (R = Me, H), and complexes with two Cr(CO)(5) fragments or dimeric t rimethylplatinum iodide were synthesized and studied by X-ray analysis. The rmal decomposition of [RC5H4Fe(CO)(2)](2)Sn(TePh)(2) complexes and their ad ducts with ML fragments (ML = W(CC)(4), 2 Cr(CO)(5), (Me3PtI)(2)) into inor ganic tellurides of a preset mixed-metal-chalcogenide composition was studi ed by differential scanning calorimetry. The temperature of complete elimin ation of organic fragments from methylcyclopentadienyl complexes is about 1 00 degrees C lower than in the case of cyclopentadienyl analogs.