Mixed halides reactions

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

Similar to the mixed-halide (Cl, I) 6-13 system, where more chlorine-rich reactions produced a new structure type, materials with an unprecedented zirconium cluster structure are obtained in the Na-Zr-(C1/I)-B system (also with. other cations, see below), when larger Cl/I ratios are used than above. Compounds characterized are Na[(Zr6B)(Cl,I)i4] and Ao.5[(Zr6B)(Cl,I)i4] (with A = Ca, Sr, Ba) [25, 26]. Single crystals of the cubic Na[(Zr6B)Clio.94(i)l3.o6] and... 

Explosions sometimes resulted on opening sealed tubes in which complex mixed halide salts of this compound had been prepared. There is no obvious source of pressure in the reaction mixture of dipotassium tetradecachlorotungstate, lithium iodide and potassium iodide. 

This selectivity for preferred reaction displacing the halide is found withboth P(III) and P(V) mixed halide/ester systems (Equation4.15)38 and has been noted in several patents to be of value for phosphonite synthesis (Equation 4.16).39 40... 

Reactions with antimony trifluoride, SbFs in the presence of antimony pen-tachloride, SbCls, form mixed halides of compositions GeClsF, GeCl3F2, GeCl2F2, and GeClFs. 

Additional studies showed that iodoferrocene was approximately as reactive as l-iodo-2-nitrobenzene under Ullmann conditions. A mixed Ullmann reaction involving these two reactive aryl halides produced 2-nitrophenylferrocene. Ullmann condensations of iodoferrocene with various sodium phenoxides and sodium arenethiolates likewise led to ferrocenyl aryl ethers and sulfides, respectively (84, 85). 

Reaction of UF5 with Me3SiCl or UC15 in methyl cyanide yields a complex with the mixed halide, UCl2F3-MeCN.178 Complexes with the pentabromides, MvBr5-xMeCN (Mv = Pa, x = 3 Mv = U, x = 2 to 3) and with an oxonitrate, Pa20(N03)g-2MeCN, are also known. 

The rate of flow of the hydrogen—three or four bubbles per second—is such that about 60 g. of bromine is vaporized in a run of 5 hours, yielding about 57 g. of mixed halides in the crude product. Increase in the rate of flow of hydrogen bromide through the reaction tube and decrease... 

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