Iron II chloride

Anhydrous hydrogen fluoride (as distinct from an aqueous solution of hydrofluoric acid) does not attack silica or glass. It reacts with metals to give fluorides, for example with heated iron the anhydrous iron(II) fluoride is formed the same product is obtained by displacement of chlorine from iron(II) chloride ... 

Indeed ferrocene was firsf prepared by adding iron(II) chloride fo cyclopenfadienyl sodium Insfead of fhe expecfed a bonded species shown m fhe equafion ferrocene was formed... 

Laughing gas, see Nitrogen(I) oxide Lautarite, see Calcium iodate Lawrencite, see Iron(II) chloride Lechatelierite, see Silicon dioxide Lime, see Calcium oxide Litharge, see Lead(II) oxide... 

Dicalcium hexakiscyanoferrate [13821 -08 ] Ca2[Fe(CN)g], is formed as yellow crystals by reaction of Hquid or gaseous HCN with iron(II) chloride in water containing Ca(OH)2 or CaCO and having pH > 8. It is used to prevent caking of other substance and serves as a useful starting material in the preparation of other [Fe(CN)g] salts. Examples of mixed salts include calcium dicesium hexakiscyanoferrate [15415-35-7] CaCs2[Fe(CN)g], and calcium dipotassium hexakiscyanoferrate [20219-00-5] CaK2[Fe(CN)g]. 

Iron(II) chloride tetrahydrate [13478-10-9] FeCl24H20, is obtained by dissolving iron metal ia aqueous HCl and ahowiag the product to crystallize at room temperature. The sohd consists of monomeric trans- octahedra which hydrogen bond extensively with each other. Iron(II) chloride... 

Indeed, fenocene was first prepared by adding iron(II) chloride to cyclopentadienyl-sodium. Instead of the expected bonded species shown in the equation, fenocene was fonned. 

It is noteworthy that carbene function may be manifested in the derivatives of tris(imidazol-l-yl)borate 44 (96AGE310). Its reaction first with n-butyllithium, then with iron(II) chloride, and finally with sodium tetraphenylborate gives the iron(III) carbene derivative 45. 

When species mJo-[(i7 -Cp )Co(Et2C2B3H4-5-X)] (X= Me, Cl) are deprotonated with -butyl lithium and then reacted with iron(II) chloride. 

Interaction of iron(II) chloride with the lithium salt of R4B2NJ (R = Me, Et) gives sandwiches 61 (R = Me, Et) (67ZAAC1, 96MI4), resembling in electronic properties those of ferrocene (99ICA(288)17). The n- rf-) complex stems from the further complex-formation of 61 (R = Me, Et) with mercury(II) salts via the unsubstituted nitrogen atom. 

Chlorechtheit, /. fastness to chlorine. Chloreisen, n. iron chloride, specif, ferric chloride. -oxyd, n. ferric chloride, iron(III) chloride, -oxydui, n, ferrous chloride, iron(II) chloride,... 

In quantitative analysis we are chiefly concerned with reactions which take place in solution, i.e. ionic reactions. We shall therefore limit our discussion of oxidation-reduction to such reactions. The oxidation of iron(II) chloride by chlorine in aqueous solution may be written ... 

When iron powder reacts with dilute hydrochloric acid, a green solution of aqueous iron(II) chloride is produced (explanation at the macroscopic level). The colour change of the solution from colourless to green may be attributed to the presence of Fe + ions in solution (explanation at the submicroscopic level). Several students (15%), however, suggested that atoms of iron and chlorine had turned green as a result of the chemical reaction. In this instance, students indicated the mistaken... 

In the chemical reaction between iron(II) oxide powder and dilute hydrochloric acid, the solution changed from colourless to light green. The suggestion by 15% of students that gpeen individual Fe + ions were present in aqueous iron(II) chloride again indicated possible extrapolation of the bulk colour of the pale green aqueous iron(TI) chloride (the macroscopic level) to the colour of individual Fe + ions (the submicroscopic and symbohc levels) in solution. 

Iron halides are the most common of these salts [more specifically as a chloride iron(II) chloride (ferrous chloride or FeCl2) and iron(III) chloride (ferric chloride or FeCls)]. 

EXAMPLE 13.13. Name the following according to the Stock system (a) FeCl, (6) U02S04, and (c) P4O10. (a) Iron(II) chloride, (b) dioxouranium(VI) sulfate, and (c) phosphorus(V) oxide. 

Alternative reducing agents are still sometimes proposed and evaluated. A detailed comparison of five reducing agents has been reported sodium dithionite, thiourea dioxide, iron(II) chloride/gluconic acid, sodium hydroxymethanesulphinate and hydroxyacetone [123]. Results of fastness tests on black polyester dyeings variously aftertreated are given in Table 12.10. 

An explosion occurred dining the preparation of iron(III) chloride from iron powder and chlorine gas in a chlorinated pyridine solvent. This was attributed to formation of iron(II) chloride, its interaction with the solvent to give iron(III) chloride, then reduction of the latter by iron to iron(II) chloride. The exotherm and increasing evolution of hydrogen chloride caused the reactor to fail [1]. 

Reaction of 2a-e with iron(II) chloride affords the ferrocenes Fe Cp tSiMe2(OCH2CH2)mOCH3]n 2 (3a-e), which are soluble in organic solvents of all polarities (including water/methanol). 

Table 1 2,6-Bis(arylimino)pyridine iron(II) chloride complexes reported... 

Attachment of dendritic wedges of either the carbosilane or benzylphenyl ether type to the para-hydroxy aryl site in [2,6-(ArN=CMe)2C5H3N (1 R = Me, Ar = 2-Me-4-OHC6H3), has been shown to proceed in good yield [162], Complexation with iron(II) chloride allows access to dendrimer-supported precatalyst 42 (Scheme 13). Using MAO as a co-catalyst, it was shown that 42 are active in the oligomerisation of ethylene the activity of these new catalysts is not, however, related to the type of dendritic wedge employed. 

Scheme 13 Use of para-hydroxy 1 as a means of linking to dendritic wedges and complexation with iron(II) chloride...

---