Search results
Results From The WOW.Com Content Network
The dihydrate, FeCl 2 (H 2 O) 2, crystallizes from concentrated hydrochloric acid. [7] The dihydrate is a coordination polymer. Each Fe center is coordinated to four doubly bridging chloride ligands. The octahedron is completed by a pair of mutually trans aquo ligands. [8] Subunit of FeCl 2 (H 2 O) 2 lattice.
Fe 2 O 3 + 6 HCl + 9 H 2 O → 2 FeCl 3 (H 2 O) 6. In complementary route, iron metal can be oxidized by hydrochloric acid followed by chlorination: [10] Fe + 2 HCl → FeCl 2 + H 2 FeCl 2 + 0.5 Cl 2 + 6 H 2 O → FeCl 3 (H 2 O) 6. A number of variables apply to these processes, including the oxidation of iron by ferric chloride and the ...
With so-called "strong field ligands" such as cyanide, the five electrons pair up as best they can. Thus ferricyanide ([Fe(CN) 6] 3− has only one unpaired electron. It is low-spin. With so-called "weak field ligands" such as water, the five electrons are unpaired. Thus aquo complex ([Fe(H 2 O) 6] 3+ has only five unpaired electrons. It is ...
For example, "ferrous sulfide" can refer to the 1:1 species (mineral name troilite) or a host of Fe-deficient derivatives . The mineral magnetite ("lode stone") is a mixed-valence compound with both Fe(II) and Fe(III), Fe 3 O 4 .
Fe(OH) 2 adopts the brucite structure, i.e. the arrangement of the atoms in the crystal are the same as the arrangement of the atoms in Mg(OH) 2. The Fe(II) centers are bonded to six hydroxide ligands. Each hydroxide ligand bridges to three Fe(II) sites. The O-H bonds are perpendicular to the planes defined by the oxygen atoms, projecting above ...
Structure of [Co 2 (OH 2) 10] 4+ color code: red = O, white = H, blue = Co. In the binuclear ion [Co 2 (OH 2) 10] 4+ each bridging water molecule donates one pair of electrons to one cobalt ion and another pair to the other cobalt ion. The Co-O (bridging) bond lengths are 213 picometers, and the Co-O (terminal) bond lengths are 10 pm shorter. [10]
Ferrous carbonate can be prepared also from solutions of an iron(II) salt, such as iron(II) perchlorate, with sodium bicarbonate, releasing carbon dioxide: [7] Fe (ClO 4) 2 + 2 NaHCO 3 → FeCO 3 + 2 NaClO 4 + CO 2 + H 2 O. Sel and others used this reaction (but with FeCl 2 instead of Fe (ClO 4) 2) at 0.2 M to prepare amorphous FeCO 3. [8] Care ...
[12] [13] The six-line form has been classified as a mineral by the IMA in 1973 [14] with the nominal chemical formula 5 Fe 2 O 3 ·9 H 2 O. [15] Other proposed formulas are Fe 5 HO 8 ·4 H 2 O [16] and Fe 2 O 3 ·2 FeO(OH) ·2.6 H 2 O. [17] However, its formula is fundamentally indeterminate as its water content is variable.