79292-34-5Relevant academic research and scientific papers
THE PREPARATION OF ORGANOIRON η1-α-ALKOXYETHYL COMPLEXES AND THEIR REACTION WITH ELECTROPHILES: CHARACTERIZATION OF CATIONIC ORGANOIRON ETHYLIDENE COMPOUNDS
Bodnar, Thomas,Cutler, Alan R.
, p. C31 - C36 (1981)
The η1-α-alkoxyethyl complexes CpFe(CO)L (IIa, L = CO; IIb, L = PPh3; IIc, L = P(OPh)3) have been prepared by the LiHBEt3 reduction of the requisite alkoxycarbene compounds CpFe(CO)L+ PF6-.Treatmen
Nucleophilic addition reactions with iron η2-alkyne derivatives. Synthesis and investigation of CpFeCO(L)(η1-alkenyl) (L = PPh3, P(OPh)3) complexes
Reger, Daniel L.,Belmore, Ken A.,Mintz, Ed,McElligott, Paul J.
, p. 134 - 140 (2008/10/08)
The reaction of [CpFeCO(L)(η2-alkyne)]BF4 (L = PPh3, P(OPh)3) complexes with a variety of nucleophilic reagents leads to a large family of CpFeCO(L) (η1-alkenyl) derivatives. Carbon-based nucleophiles are generally best delivered from R2Cu(CN)Li2 type reagents and include R = Me, Ph, CH=CH2, and C≡CMe. The latter two reagents react with [CpFeCO[P(OPh)3](THF)]BF4 to yield the η1-alkenyl or η1-alkynyl complex, respectively. The reagents Na[CH(CO2Et)2], KCN (or better R4NCN), and NaSPh are also successful in the alkyne addition reactions. All of the nucleophiles add trans. The CpFeCO[P-(OPh)3][η1-(E)-C(Me)==C(Me)Nuc] complexes show dynamic NMR behavior. At low temperatures, two rotamers of the alkenyl group about the Fe-C(alkenyl) bond are observed and these equilibrate near ambient temperature. Rotamers are not observed for L = PPh3 complexes or for complexes prepared from unsymmetrical alkynes. Isomerization of the double bond for certain η1-alkenyl complexes is also observed.
