70583-55-0Relevant academic research and scientific papers
Preparations of novel half-sandwich iron carbonyl phosphine complexes: intramolecular link between the cyclopentadienyl and the phosphine ligand
Wang, Tein-Fu,Juang, Jung-Pin,Wen, Yuh-Sheng
, p. 117 - 128 (2007/10/03)
The novel iron half-sandwich complex (η5:η1-C5H4CH2CH2PPh2)Fe(CO)Cl (4), in which the ligating phosphine was connected to the cyclopentadienyl ring, was prepared by reacting the LiC5H4CH2CH2PPh2 (2) with FeCl2 followed by CO bubbling.Reaction of 4 with sp-, sp2- and sp3-hybridized carbon nucleophiles provided formal substitution product (η5:η1-C5H4CH2CH2PPh2)Fe(CO)R (5).Solid state structures of the methyl complex 5a, phenylacetylide 5g and trimethylsilylacetylide 5j were characterized by single-crystal X-ray analyses.Keywords: Iron; Alkyl; Alkyne; Cyclopentadienyl; Phosphine; Vinyl
Syntheis and Crystal Structure of , a Compound having a Cyclopentadienyl Proton with a Chemical Shift of δ 1.91 p. p. m.
Slawin, Alexandra M. Z.,Williams, David J.,Crosby, John,Ramsden, James A.,White, Colin
, p. 2491 - 2494 (2007/10/02)
The room-temperature 1H n. m. r. spectrum of (1) in 2H8>toluene contains a cyclopentadienyl resonance at δ 2.29; upon cooling to -60 deg C this moves to δ 1.91.This high-field chemical shift is ascribed to the shielding effect of the aromatic ring current of a phenyl ring of the PPh3 ligand.The X-ray crystal structure of (1) is reported; the crystals are orthorhombic, space group Pc21n with a = 10.161(2), b = 15.735(3), c = 19.256(5) Angstroem, and Z = 4.The structure was solved via the heavy-atom method and refined to R = 0.028 using 2137 independent reflections.Reaction of compound (1) with trimethyl phosphite gives (2) and with AgBF4 and (+)-PhCH(Me)NH2 yields the diastereoisomers of (3).
