Zirconium -chloride ZrCl

Sulfur chloride fluoride (SClFg) 741 CljZrj(g) Zirconium chloride (ZrCl) 789... 

Titanium chloride (TiCl ) Titanium chloride (TiCl ) Zirconium chloride (ZrCl ) Zirconium chloride (ZrCl ) Cobalt chloride ((CcCl ) )... 

Zirconium, tetrakis(acetylacetonate)-stereochemistry, 32 Zirconium, tetrakis(acetylacetone)-stercochemistry, 94 Zirconium, tris(phcnylenedithio)-structure, 63 Zirconium chloride (ZrCl) structure, 27 2.r6Cli2 structure, 27 Zirconium iodide Zr6li2... 

The metallic monohaHdes zirconium chloride [14989-34-5] ZrCl, and zirconium bromide [31483-18-8] ZrBr, reversibly absorb hydrogen up to a limiting composition of ZrXH (131). These hydrides are less stable than the binary hydride ZrH2, and begin to disproportionate above 400°C to ZrH2 and ZrX in a hydrogen atmosphere (see also Hydrides). 

Zirconium tetrachloride, ZrCl, is prepared by a variety of anhydrous chlorination procedures. The reaction of chlorine or hydrogen chloride with zirconium metal above 300°C, or phosgene or carbon tetrachloride on zirconium oxide above 450°C, or chlorine on an intimate mixture of zirconium oxide and carbon above 700°C are commonly used. 

Zirconium chloride and bromide have closely related but dissimilar stmctures. Both contain two metal layers enclosed between two nonmetal layers which both have hexagonal stmcture. In ZrCl, the four-layer sandwich repeats in layers stacked up according to /abca/bcab/cabc/, whereas the ZrBr stacking order is /abca/cabc/bcab/ (188). Both are metallic conductors, but the difference in packing results in different mechanical properties the bromide is much more brittle. 

A dimeric zirconium(IV) trihydride complex has been synthesized by reaction of LiBHEt3 with the tridentate triaryloxide zirconium chloride complex ZrCl(THF)2(t-Bu-L) (H3(t-Bu-L) = 2,6-bis(4-t-butyl-6-methylsalicyl)-4-f-butylphenol) (equation 14). The solid-state structure shows each zirconium center adopts a trigonal prismatic stracture with a Zr-Zr separation of 3.163(1) A. In solution, the three resulting hydrides appear equivalent on the NMR timescale. Analogous reactivity was observed for the titanium conger. However, in the resulting titanium trihydride, the metals are assigned formal Ti(III) oxidation states. ... 

ZrCl has a homoatomic-layer structure sequenced Cl-Zr-Zr-Cl. Each Zr atom has three neighbours in the adjacent sheet at 3.09 A, six more in the same sheet at 3.42 A and three chlorine atoms on the other side at 2.63 A. Weak chlorine-chlorine interactions between sheets at 3.61 A contrast with the strong metal-metal binding within sheets. These structural features account for the graphitic nature and anisotropic electrical conduction of ZrS. Thermodynamic parameters have been obtained for the reduction of zirconium chlorides. The reaction of ZrC with a melt containing alkali-metal chlorides and titanium chlorides has been investigated. ... 

ZrBr, Zirconium bromide, 22 26 ZrCl, Zirconium chloride, 22 26 ZrCl402C8H,6, Zirconium(lV), tetrachlo-robis(tetrahydrofuran)-, 21 136... 

Conniek and McVey [49CON/MCV] measured the extraction of zirconium into benzene as Zr(TTA)4, in the presence of chloride. Only two measurements were taken and were used to indicate the formation of ZrCP. However, due to the inadequacy of the number of data points used to derive the stability constant of the speeies, it has not been included in this review. Levitt and Freund [56LEV/FRE] studied the solvent extraction of zirconium with tributyl phosphate (TBP) in the presence of chloride (6.54 M HCIO4 25°C). They did not determine the stability of the zirconium chloride complexes formed but their data were subsequently used by [57SOL] as the basis for a determination of the stability constants for four complexes ZrCl, o = 1 to... 

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