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

Abstract

Complexes [RC5H4Fe(CO)2]2Sn(TePh)2 (R=H, Me) containing stable heterometallic Fe−Sn−Fe fragments with two phenyltellurium groups at the tin atom were synthesized from [RC5H4Fe(CO)2]2SnCl2 (R=H, Me) and sodium phenyltelluride and their structures were established by X-ray analysis. Their chelates with tungsten tetracarbonyl, [RC5H4Fe(CO)2]2Sn(TePh)2[W(CO)4] (R=Me, H), and complexes with two Cr(CO)5 fragments or dimeric trimethylplatinum iodide were synthesized and studied by X-ray analysis. Thermal decomposition of [RC5H4Fe(CO)2]2Sn(TePh)2 complexes and their adducts with ML fragments (ML=W(CO)4, 2 Cr(CO)5, (Me3PtI)2) into inorganic tellurides of a preset mixed-metal—chalcogenide composition was studied by differential scanning calorimetry. The temperature of complete elimination of organic fragments from methylcyclopentadienyl complexes is about 100°C lower than in the case of cyclopentadienyl analogs.