Ĭhromium triiodide can also be prepared as nanoplatelets from the alkoxide Cr(OCMe tBu 2) 3. Addition of small amounts of chromous iodide accelerates the dissolving process. Like CrCl 3, the triiodide exhibits slow solubility in water owing to the kinetic inertness of Cr(III). Ĭhromium triiodide is stable in contact with oxygen and moisture, but at temperatures approaching 200 ☌ it reacts with oxygen and releases iodine. To obtain high purity samples, the product is thermally decomposed at 700 ☌ to sublime out chromium(II) iodide. Preparation and properties Ĭhromium triiodide is prepared by the direct reaction of chromium metal with an excess of iodine. In this structure, chromium exhibits octahedral coordination geometry. Like the isomorphous chromium(III) chloride (CrCl 3), chromium(III) iodide exhibits a cubic-closest packing arrangement in a double-layer crystal lattice. It is a black solid that is used to prepare other chromium iodides. Section 24.Chromium(III) iodide, also known as chromium triiodide, is an inorganic compound with the formula CrI 3. Niobium and Tantalum Phosphides NbP2, TaP2, NbP, TaP Potassium Peroxyniobate, Potassium Peroxytantalate K3NbO8, K3TaO8 Peroxyniobic and Peroxytantalic Acids HNbO4 Niodium (V) and Tantalum (V) Oxides Nb2O5 Niobium (IV), Niobium (III) and Niobium (II) Iodides NbI4, NbI3, NbI2 Niobium (V) and Tantalum (V) Bromides NbBr5, TaBr5 Niobium (V) and Tantalum (V) Chlorides NbCl5, TaCl5 Potassium Hexathiocyanatovanadate (III) K3V(SCN)6 Vanadium (IV) Oxysulfate (Vanadyl Sulfate) VOSO4 Hydrogen Disulfatovanadate (III) HV(SO4)2 Īmmonium and Potassium Disulfatovanadate (III) NH4V(SO4)2, KV(SO4)2 Titanium, Zirconium and Thorium Silicides TiSi2, ZrSi3, ThSi2 Titanium, Zirconium and Hafnium Carbides TiC, ZrC, HfC Titanium Phosphide, Zirconium Phosphides, Thorium Phosphide TiP, ZrP2, ZrP, Th3P4 Titanium Oxonitrate, Zirconium Oxonitrate TiO(NO3)2, ZrO(NO3)2 Titanium, Zirconium and Hafnium Nitrides TiN, ZrN, HfΝ Purification of Zr Salts via the Tetrahydrate Titanium, Zirconium and Thorium Sulfides TiS3, TiS3, TiS<2 Titanium (IV), Zirconium (IV) and Thorium (IV) Iodides Til4 (ZrI4, ThI4) Zirconium (IV), Hafnium (IV) and Thorium (IV) Chlorides and Bromides ZrCl4, HfCl4, ThCl4 ZrBr4, HfBr4, ThBr4 Titanium (ΙII) Chloride, Bromide and Iodide TiCl3 TiCl3 Īmmonium Hexachlorotitanate (NH4)2 Titanium (H) Chloride, Bromide and Iodide TiCl2, TiBr2, TiI2 La, Ce, Pr and Nd Monochalcogenides LnS, LnSe, LnTeĮuropium (II) Chalcogenides EuS, EuSe, EuTe Rare Earth Hydroxides Ln(OH)3 (Crystalline) Rare Earth Trichlorides LnCl3 (Anhydrous) Pure La, Pr and Nd Compounds from Cerium Earths by Ion Exchange Potassium Tetrathiocyanomercurate (II) K2Hg(SCN)4 Potassium Tetracyanomercurate (II) K2Hg(CN)4 Potassium Triiodomercurate (II) KHgI3.H2OĬopper (I) Tetraiodomercurate (II) Cu2HgI4 Potassium Tetrachloroaurate (ΙII) KAuCl4 Tris-α,α'-dipyridylsilver (II) Perchlorate (ClO4)2 O-Phenanthrolinesilver (II) Persulfate S2O8 Part II Elements and Compounds (Continued) Considering the value of information presented, the manual can best serve the interest of readers and scientists wanting to institute a system in the conduct of experiments in laboratories. The manual also provides formula and subject index, including an index for procedures, materials, and devices. The third part of the guidebook discusses special compounds. Lengthy discussions on the characteristics and nature of these elements are presented. The manual also looks at other elements such as scandium, yttrium, titanium, zirconium, hafnium, and thorium. Numerical calculations and diagrams are presented to show the properties, compositions, and chemical reactions of these materials when exposed to varying laboratory conditions. Included in the discussions are copper, silver, and gold. Composed of contributions of various authors, the second part of the manual focuses on elements and compounds. Handbook of Preparative Inorganic Chemistry, Volume 2, Second Edition focuses on the methods, mechanisms, and chemical reactions involved in conducting experiments on inorganic chemistry.
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