Halides mixed

Mixed Halide Alkoxides. Metal chlorides, hydrogen chloride, and carboxyUc acid chlorides convert metal alkoxides to metal chloride alkoxides. 

Mixed halide additions are most satisfactorily interpreted as proceeding via a halonium complex (1), in which the less electronegative halogen approaches from the less hindered a-side. The energetic preference for a pm-planar transition state leading to the diaxial product (2) is sufliciently great that the... 

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 mixed halide species OsX6 Y2 or OsXaYAZ2- (a + b + c = 6) have been studied in considerable detail [37],... 

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 ]... 

The mixed halide-hydrides PhjSnHCl and PhjSnHBr have been prepared from the reaction of diphenyltin dihydride with the appropriate diphenyltin dihalides (274). 

Centered Zirconium Clusters Mixed-halide Systems... 

In this article we will review some recent results in mixed-halide zirconium cluster chemistry, which were developed starting from John Corbetts protocols. 

Fig. 5.3 [110] section of the rhombohedral [(Zr6Z)h2] type mixed halide structure [c vertical). The iodine atoms are drawn with open ellipsoids, and chlorines are shaded. 

The mixed halide structure, for which the composition was refined to [(Zr6B)Clii.47(2)ll,, 53], crystallizes in the tetragonal space group P42/mnm, contrary to the only-chloride parent-type, which crystallizes orthorhombically [17]. This increase of symmetry is achieved through a random iodine substitution of 19.1(3)% of the Cl4 -site. Thereby the Zr3CF -units become planar, as can be seen from Fig. 5.5. 

Contrary to the 6-12 mixed halide phase, the three-dimensional cluster network of this structure is based on chlorine bridges only. As detailed in [17] an interesting relationship exists between this 6-13- and the [(Zr6B)Cli4] ([Nb6Cli4]) structure [19], which is shown in Fig. 5.6. The transformation of Nb6Cli4... 

Fig. 5.4 View of the structure and intercluster connectivity of the [(ZreBjClia] structure, and mixed halide derivative, respectively. Edge-bridging chlorines are...

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