Two-fragment addition of borohydride to iron complexes: synthesis of dithioformate iron complexes with B–H–Fe bond interaction. X-Ray structural characterization of Fe[η3-HC(SMe)S → B(H)H2](CO)(PMe3)2
Abstract
Reaction of Fe(X)(µ2CS2R)(CO)(PR3)2(X = Cl, I) complexes with NaBH4 leads to both hydride and BH3 addition with the formation of dithiofromate–iron(O) Fe[µ3-HC(SR)S → BH3](CO)(PR3)2 complexes (4) containing an agostic B–H–Fe interaction; the addition of pyridine to (4) liberates a 16 electron-iron(O) moiety by trapping of the BH3 unit.