Iron dichloride

Chemical Designaflons - Ferrous chloride tetrahydrate. Iron dichloride. Iron protochloride ... 

Electronic Grade Silicon (EGS). As the first step in the production of electronic grade silicon (EGS), an impure grade of silicon is pulverized and reacted with anhydrous hydrochloric acid, to yield primarily tricholorosilane, HSiClg. This reaction is carried out in afluidizedbed at approximately 300°C in the presence of a catalyst. At the same time, the impurities in the starter impure silicon reactto form their respective chlorides. These chlorides are liquid at room temperature with the exception of vanadium dichloride and iron dichloride, which are soluble in HSiCl3 at the low concentration prevailing. Purification is accomplished by fractional distillation. 

These give rise to the same dangerous reactions as chromium halides. Iron dichloride and trichloride detonate in contact with sodium or potassium. There is also a violent combustion of an iron trichloride/calcium carbide mixture, which leads to the formation of melted iron. 

In contrast, the related diamines 45 and 46 [cf. (3,5-/-Pr2C6H2-4-NH2)2CH2 above] give, on treatment with 2,6-diacetylpyridine, oligomeric polyimines that can be readily complexed with iron dichloride to afford 47 and 48, respectively (Fig. 14). Notably, on activation with MAO, 47 and 48 are active catalysts for ethylene polymerisation and indeed perform more efficiently at elevated temperatures than those of the original bis(imino)pyridine iron precatalyst 5 [166],... 

Iron(II) chloride occurs in nature as the mineral lawrencite. Iron dichloride is used as a mordant for dyeing and as a reducing agent. It also is used in pharmaceutical preparation in sewage treatment and in metallurgy. 

The biphenyl iron complex, 2,6-diacetylpyridinebis(4-chloro-2,6-dimethyl-phenylimine)iron dichloride, (III), was prepared by Kristen et al. (1) and used to prepare polyethylene. 

Preparation 2,6-Di-(l,3,5-Trimethyl-4-Pyrazolyl)Ethanimidoyl Pyridine Iron Dichloride... 

The Ziegler-Natta catalyst 2,6-diacetylpyridinebisiron(II) chlorotrimethylalu-minium, (I), and procatalyst 2,4- [N-(2,6-dimethylphenyl)]phenylimidoyl 6-methyl pyrimidine iron dichloride, (11), were prepared by Kimberley [1] and Gibson [2], respectively, and used as high-activity 1-olefin polymerization catalysts. 

The electrodeposition of iron, Fe, has been reported in an acidic EMICl-ZnCl2 ionic liquid [85]. Iron dichloride, FeCl2, is soluble in the ionic liquid which contains ZnCl2 at 40 mol%. The dissolved iron species is reducible at around 0.1 V vs. Zn/Zn(II), resulting in the electrodeposition of metallic iron. Zn-Fe alloys are obtained in this ionic liquid. 

SYNS IRON(II) CHLORIDE (1 2) FERROUS CHLORIDE, solution (NA 1760) (DOT) FERROUS CHLORIDE, solid (NA 1759) pOT) IRON DICHLORIDE D IRON PROTOCHLORIDE... 

The effects of introducing halogens in the 2 and 6 position of phenyl imine catalysts was also studied in diimine pyridine iron dichloride/MAO systems [13]. These catalysts afford linear products with a low olefin content, generally less than one (olefin) functionality per chain. The latter is due to a fast transfer of iron bound alkyl groups to the aluminum compounds that are present in excess. After hydrolysis, alkanes are obtained. When a high ratio of aluminum alkyl to iron catalyst is used, polyethene waxes are obtained due to the statistically favored alkyl group exchange between the metal species. 

Fig. 3.11 Ethene polymerization with bis[(2,5-dichlorophenyl)imine]-2,6-diacetimine iron dichloride and various concentrations of MAO. (A) yield, (B) molecular weight Mn, (C) chains/aluminum.

IRON DICHLORIDE (7758-94-3) Contact with ethylene oxide may initiate polymerization. Reacts violently with reducing agents, acrolein, alcohols, chlorine trifluoride, ethers, fluorine, hydrazine, hydrazinium perchlorate, hydrogen peroxide, finely divided aluminum or magnesium, peroxyfuroic acid, sodium acetylide. Sensitizes most organic azides that are unstable shock and heatexplosives. Forms explosive materials with 1,3-di(5-tetrazoyl)triazene, potassium, sodium. Incompatible with glycidol, isopropyl chlorocarbonate, nitrosyl perchlorate, sodium borohydride. Aqueous solution attacks metals. 

Iron dichloride is a hygroscopic white solid readily soluble in water and ethanol. It may be prepared by reaction of metallic iron with HCl at red heat, under mild conditions in THF or methanol, or with a mixture of the acid and chlorine at 700 °C. The trichloride decomposes at 300 °C in vacuo or may be reduced for example with H2 or HjS to yield FeClj. Thermal decomposition of FeCl3 aids purification of FeCl2 by vacuum sublimation. Anhydrous FeCl2 may also be prepared by dehydration of [FeCl2(1120)4] and the reaction of metallic iron with CCl4. ... 

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