32824-71-8

Upstream product

• 75-05-8 acetonitrile 
• 110269-11-9 C₅H₅Fe(CO)2CH₂CHC₆H₈(CH₃)O⁽¹⁺⁾*BF₄^(1-) 
• 38117-54-3 cyclopentadienyl iron(II) dicarbonyl dimer 
• 75182-46-6 C₅H₅Fe(CO)2CH₂CHC₆H₉O⁽¹⁺⁾*BF₄^(1-) 

Downstream Products

• 444105-06-0 dicarbonyl-cyclopentadienyl-(phenyl(dipyrrolidinyl)phosphine)iron tetrafluoroborate 
• 12078-28-3 dicarbonylcyclopentadienyliodoiron(II) 

Relevant academic research and scientific papers

The reactions of AgY salts with 4-n(CNMe)n> complexes (Y(1-) = NO3(1-), BF4(1-) or PF6(1-); n = 0, 1 or 2). The crystal structure of BF4

The oxidative cleavage of 4-n(CNMe)n> (n = 0 - 2) by 2AgX gives mononuclear products.It is shown to be a two-electron process in most solvents but a one-electron process in acetonitrile.The two-electron oxidations proceed by way of adducts such as >BF4 which are isolable when n = 2, detectable when n = 1 and postulated when n = 0.The one-electron process gives no adducts, and 1AgX cleaves all of the substrate to (1+) and . (L = CO or CNMe).The latter may combine or react with added CHBr3 to give .The structure of BF4 has been determined by X-ray diffraction.

Vinylation of cyclohexanone enolates using vinyl ether-iron complexes. Diastereoselectivity of carbon-carbon bond formation

Cationic vinyl ether-iron complexes 1, isolated as stable BF4- salts, are readily available from α-halo acetals and ketals. The olefin ligand in these complexes is unsymmetrically bound to the metal, which accounts for the relatively low barrier for rotation about the formal double bond, which is observed in these substances (15-23 kcal/mol), and for the high regioselectivity with which nucleophiles add to the activated olefinic center. The salts 1 serve as vinylating, isopropenylating, and cis-propenylating reagents with cyclohexanone enolates. Reaction of 1a with cyclohexanone enolate gave a single diastereomeric product 5. This has been converted to the lactone 10, which establishes the relative configuration of the adjacent chiral centers in 5. The relative configuration of analogous chiral centers in the major diastereomer 16a, formed by the alkylation of 3-methylcyclohexanone enolate with 1a, has been established by a single-crystal X-ray diffraction study and shown to be identical with that in 5. Complex 1a also gives a single diastereoisomeric adduct with 6-methylcyclohexanone enolate, and this has been shown by 13C NMR studies to have the same relative configuration at the newly formed chiral centers as in 5 and 16a. Alkylation of 5-methylcyclohexanone enolate with 1b leads to a mixture of isopulegone and isoisopulegone, while alkylation of the kinetic enolate derived from 3-methyl-2-cyclohexenone with this complex yields isopiperitenone.

CYCLOPENTADIENYLEISEN-KOMPLEXE MIT REER-LIGANDEN (E = S,Se,Te); SYNTHESE UND SPEKTROSKOPISCHE UNTERSUCHUNGEN

The cations + (II-IV; E = S,Se,Te; R = CH3, n-C4H9, t-C4H9, C6H5) and 2+ (V; E = S, Se, Te; R = C6H5) are prepared by treatment of BF4 (I) with REER ligands.The spectroscopic data indicate the absence of ?-bonding in the coordinated REER ligand (R = CH3).Unlike the corresponding disulfide complex, BF4 (IIIb, R = C6H5) shows a dynamic process, which is interpreted as a 1,2-shift.On the other hand, in BF4 (IVb; R = C6H5) no splitting of the phenyl group in the 13C NMR spectrum is observed, even at 200 K.