Spectrophotometric Studies of Iron(III) Chloride in Nonaqueous Solvents

Abstract

By studying the ultraviolet spectra of mixtures of FeSfClOif (where S is the solvent) and (C2//5)42VC7 at different mole ratios, we have been able to determine the principal species present when a small amount of iron (III) chloride is dissolved in methanol, N-methylacetamide, or dimethyl sulfoxide. Dichloroand monochloroiron(III) complexes exist in methanol, monochloroiron(III) is the predominant species in dimethyl sulfoxide, and Fe-(CHiCONHCH^f* is formed in N-methylacetamide. These results are interpreted in terms of the donor strength and solvating ability of the solvent. Means of estimating these properties are discussed.

Influence of FeCl3 on the Mechanical, Thermal, and Dynamic Mechanical Behavior of PVC

“…Spectroscopic data revealed the ferric chloride can exist as FeCl 3 and FeCl 4 - in solution − In our case, this ion results from the interaction between PVC and FeCl 3 , giving origin to the ion pair represented in Scheme 1 . The characteristic bands for the tetrachloroferrate ions are not observed in THF solutions of FeCl 3 , in the absence or in the presence of PVC.…”

Coordination complexes between iron(III) chloride and polyether, polyester, and poly(ether ester)

“…The black crystalline FeCl3 has a semicovalent layer structure in which each iron atom is octahedrally surrounded by chlorine. Iron(III) chloride forms solvates with many nonaqueous solvents (solvate complexes), e.g., FeClr2C2HsOH31'32 and FeCl3-(C2H5)20,32 or addition complexes with benzene,33 dimethyl sulfoxide,31 N-methylacetamide 31 and N.Af-dimethylacetamide. 34 The structures of many of these complexes are still unknown.…”

Spectrophotometric study of the vapors of iron(III) chloride and of mixtures of iron(III) chloride and aluminum(III) chloride. Evidence for formation of mixed metal dimer molecules

“…The solution spectrum of tetraethylammonium tetrachloroferrate(III) has been reported to show two similar bands with maxima at 248 and 367 µ, and similar spectra have been obtained from solutions of iron(III) chloride in other solvents. [16][17][18][19] While the thermodynamic properties of FeAlClg are such as to give values of K\ around 1.6, not very large, nonetheless formation of the mixed metal dimer has the effect of considerably increasing the amount of iron in the vapor phase above solid FeClg when aluminum chloride vapor is present at substantial concentrations. FeAlCl6 is appreciably more volatile than FegClg and its formation may be expected to increase the difficulty of separation of iron as an impurity in aluminum chloride and vice versa by fractional sublimation.…”