Novel C–C and C–N coupling reactions on a di-iron–α-di-imine complex in the reaction of Fe2(CO)6{RNC(H)C(H)NR} with methyl propynoate; X-ray crystal structures of Fe2(CO)5{(c-C6H11)NCHCHN(c-C6H11)C(O)CHCCO2Me}, Fe2(CO)6{PriNCHCHN(Pri)CHCCO2Me} and Fe2(CO)4{PriNCHCHN(Pri)CHCCO2Me}
Muller, Fred; van Koten, Gerard; Vrieze, Kees; Krijnen, Bert; Stam, Casper H.
Журнал:
Journal of the Chemical Society, Chemical Communications
Дата:
1986
Аннотация:
The reaction of Fe2(CO)6(Rdab)=[Rdab = RN.dbd;CHCH.dbd;NR; R = Pr<sup>i</sup> or c-C6H11(cyclohexyl)] with methyl propynoate at room temperature yields two products (X-ray): Fe2(CO)5{RN.dbd;CHCHN(R)C(O)CH.dbd;CCO2Me}, where the Rdab ligand, a CO, and an alkyne are coupled to form an 8e donating ligand, and Fe2(CO)6{RNCHCH.dbd;N(R)CHCCO2Me}, containing a 6e donating heterocyclic ligand, formed by coupling of the terminal alkyne C atom to both the Rdab N atoms in an unusual fashion; heating of the latter complex yields Fe2(CO)4{RNCHCHN(R)CHCCO2Me}(X-ray), with an unprecedented bis-η<sup>3</sup>-aza-allyl bonded ligand.
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