Coupling of a 17-electron vinyl complex with chiral recognition: synthesis of the pure diastereoisomers of the bridging bis(carbene) complex [{Fe(C5Me5)(CO)(PMe3)}2{µ–C(OMe)[CH2]2–C(OMe)}][PF6]2

Abstract

The C–C bond-forming reaction by direct coupling of two chiral 17-electron metal vinyl units [Fe(C5Me5)(CO)(PMe3){C(OMe)CH₂}]˙+ affords the µ-bis(carbene) dimetallic complex [{Fe(CBMe₅)(CO)(PMe₃)}₂{µ-C(OMe)[CH₂]₂–C(OMe)}][PF₆]₂5 with chiral recognition (major : minor = 2 : 1); the two diastereoisomers are isolated in a pure form.