Platinate, methyl -, chloride

Tri-p-tolyl tellurium iodide1 melts with decomposition at 232° to 233° C., dissolves readily in methyl alcohol or chloroform, less readily in benzene or ether, and is insoluble in water. Tri-p-tolyl tellurium bromide occurs when the iodide or chloride is boiled with silver bromide. It melts at 265° to 266° C. with decomposition, and dissolves in alcohols or chloroform, but is insoluble in benzene or ether. Tri-p-tolyl tellurium chloride is prepared from the bromide in the usual way. It melts at 260° to 261° C. and gives precipitates with the chlorides of mercury, tin and gold, picric acid and platinic chloride. The hydroxide is a resin, melting at about 110° C., and yielding a pier ate, consisting of long prisms, M.pt. 194° to 195° C.a... 

PLATIN (German) (7440-06-4) Powdered form is a highly reactive catalyst, and may cause fire and explosions on contact with many substances, including oxidizers, acetone, strong acids, finely divided aluminum, dioxygen difluoride, ethyl alcohol, hydrazine, hydrogen peroxide, lithium, methyl hydroperoxide, nitrosyl chloride, ozonides, peroxymonosulfu-ric acid, red phosphorus. Incompatible with ammonia, arsenic, chlorine dioxide, hydrogen, methyl hydroperoxide, selenium, tellurium, vanadium dichloride. 

Such polymerization can be avoided by using a catalyst composed of a Group VIII metal or a derivative thereof, e.g., platinum (as platinum black or platinized asbestos or charcoal), hydrogen hexachloroplatinate, or ruthenium chloride then the 1 1 adducts can be obtained in good yield from olefins such as styrene, acrylonitrile, and methacrylic esters with, e.g., dichloro(methyl)-silane 347-349 nevertheless it is advantageous to exclude oxygen and add a polymerization inhibitor such as te/7-butylpyrocatechol or 2,6-di-terf-butyl-4-methylphenol. 

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