Titanium methoxide

Titanium malates, 25 89 Titanium metal, 25 61 Titanium methoxides, 25 78 Titanium mill shipments, 24 839 Titanium monosulfide, 25 57 Titanium monoxide, 25 13-14 Titanium monoxychloride, 25 53 Titanium nitrate, 25 10-11 Titanium nitride(s), 25 9-10... 

Hydrolysis and Condensation. The rate of hydrolysis of the tetraalkyl titanates is governed by the nature of the alkoxy groups. The lower titanium alkoxides, with the exception of tetramethyl titanate [992-92-7], are rapidly hydrolyzed by moist air or water, giving a series of condensed titanoxanes, (Ti— O—Ti— O—) (17). As the chain length of the alkyl group increases, the rate of hydrolysis decreases. Titanium methoxides, aryloxides, and C-10 and higher alkyl titanates are hydrolyzed much more slowly. 

Exposure to seawater results in decrease in critical stress intensity factor and the susceptibility to SCC68 0.2% Fe improves the resistance to SCC presence of >5 wt percent of A1 increases the velocity of cracking Sn in the alloy decreases SCC resistance chloride bromide and iodide induce or accelerate SCC69 Occurs by trangranular cleavage of a-phase in which a-phase controls the crack propagation rate Intergranular corrosion due to formation of titanium methoxide... 

Tetrakis(ethylthio)uranium, 3096 Titanium butoxide, 3730 Titanium(III) methoxide, 1317 Titanium tetraisopropoxide, 3579 Tungsten hexamethoxide, 2604 Zinc ethoxide, 1704... 

The direct electrochemical synthesis of metal alkoxides by the anodic dissolution of metals into alcohols containing conducting electrolytes was initially demonstrated by Szilard in 1906 for the methoxides of copper and lead.19 More recently the method has received some attention particularly in the patent literature.29-25 The preparation of the ethoxides of silicon, titanium, germanium, zirconium and tantalum by electrolysis of ethanolic solutions of NH Cl has been patented, although the production of the ethoxides was found to cease after several hours.24,25... 

Tetrakis(ethylthio)uranium, 3090 Titanium butoxide, 3724 Titanium tetraisopropoxide, 3573 Titanium(III) methoxide, 1313 Tungsten hexamethoxide, 2600 Zinc ethoxide, 1698... 

Methanol decomposes on titanium dioxide surfaces by mechanisms that are similar to those by which formic acid decomposes. Methanol can reversibly adsorb on single crystal surfaces of titania (reaction 16) in a molecular state, or it may dissociatively adsorb by interaction with surface lattice oxygen anions, forming a surface methoxide (reaction 17). Reaction (18) represents the disproportionation reaction of hydroxyl groups on the surface of the metal oxide. 

The ideal (Oil -faceted surface contains exclusively five-coordinate titanium cations, so a bimolecular disproportionation reaction (see reaction (23)) to produce the ether product is precluded. Although the sputtered surface contains low-coordinate titanium cations and ample oxygen vacancies, the formation of dimethyl ether is exclusive to the (114 -faceted surface. In fact, the defect density drives all of the methoxides to fill those oxygen vacancies, and the resulting carbon is deposited on the surface, only to be burned off as CO, as illustrated in reaction (24) [74]. 

Ribosidation of the trimethylsilyl derivative of 2-hydroxypyrazine (69) (prepared with trimethylsilyl chloride and bistrimethylsilylamine) with 1,2,3,5-tetra-O-acetyl-/J-D-ribofuranose and titanium tetrachloride in 1,2-dichloroethane, followed by deacetylation with sodium methoxide, gave 2-oxo-l-( -D-ribofuranosyl)-l, 2-dihydropyrazine and its 4-oxide was prepared similarly (1035). A similar reaction occurred with the trimethylsilyl derivative of 3-hydroxypyrazine 1-oxide and 1,2,3-tri-<3-acetyl-D-erythrose (1110). 

Triphenyllead(IV) methoxide forms a similar stable adduct with di-l-naphthyl-carbodiimide and catalyzes the addition of methanol to the carbodiimide. Two of the four Ti-0 bonds in titanium(IV) tetraisopropoxide add to di-p-tolylcarbodiimide to give the bis(isourea) ether . 

Titanium (IV) methoxide [992-92-7] M 172,0, m 200-210 , b 243 /52mm. It is extremely sensitive to moisture. Dissolve it in H20-free C6H6, filter, evaporate and distil it in vacuo under N2. It is FLAMMABLE and TOXIC. [Bradley et al. Metal Alkoxides Academic Press 1978, ISBN 0121242501.]... 

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