Mixed halides oxide

The mixed halides TeClFs and TeBrFs are made by oxidative fluorination of TeCU or TeBr4 in a stream of Fi diluted with N2 at 25°. Under similar conditions Tel4 gave only TeFg and IF5. TeClFs can also be made by the action of GIF on TcF4, TeCU or Te02 below room temperature it is a colourless liquid, mp —28°, bp 13.5°, which does not react with Hg, dry metals or glass at room temperature. 

Ruthenium(IV) produces few other complexes of interest but osmium(IV) yields several sulfito complexes (e.g. [0s(S03)6] and substituted derivatives) as well as a number of complexes, such as [Os(bipy)Cl4] and [Os(diars)2X2] (X = Cl, Br, I), with mixed halide and Group 15 donor atoms. The iron analogues of the latter complexes (with X = Cl, Br), are obtained by oxidation of... 

The deposition of thin films of the high-temperature superconductor yttrium-barium-copper oxide, YBa2Cu307, is obtained from the mixed halides, typically YCI3, Bal2, and CUCI2, with O2 and H2O as oxygen sources. Deposition temperatures are 870-910°C.f ]... 

Br)]2, exclusively. Low concentrations of 1,2-bromochloroethane, however, yield the mixed halide metal dimers Pt2(pop)4(Br)(Cl) " and Ir2(p-pz)2(C0D)2(Br)(Cl). This result is predicted by the proposed mechanism (Figure 5). Photolysis results in formation of Pt2(pop)4 (Br)4 or Xr2(p-pz)2(C0D)2(Br) as intermeditaes. The intermediate can react with another bromochloroethane molecule, as it does when the latter species is in high concentration, to yield the dibromide dimer or it can react with the chloroethane radical to yield the mixed halide metal species. The latter pathway becomes competitive at low halocarbon concentrations. In general, the oxidative addition of halocarbons is typical of the photochemistry arising from electron transfer from d -d metal dimers with the final product being the stable d -d metal-metal bonded dimers (24-25). 

Lanthanides as components in non-oxide systems As halides With co-catalysts for olefin polymerization in mixed halides for oxychlorination as supports... 

The most extensive group of complexes that are known to have this oxidation state are the mixed halide-phosphine derivatives of the triply bonded Re4+ core, a moiety that possesses the electron-rich o2n 52S 2 electronic configuration (Table 2).5... 

Solids with octahedral, tetrahedral, square planar, and linear metal coordination geometries, including many different types of polyhedra connectivity modes, are amenable to dimensional reduction. Tulsky and Long compiled an enormous database of over 300 different allowed combinations of M and X and over 10,000 combinations of A, M, and X. The formalism may be extendable to quaternary phases as well. However, frameworks containing anion-anion linkages, anions other than halides, oxide, or chalcogenides, nonstoichiometric phases, and mixed-valence compounds were excluded from their initial study. 

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