Tetraisopropyl

Similarly, another important esterification reaction of isopropyl alcohol iavolves the production of tetraisopropyl titanate [546-68-9], a commercial polymeri2ation catalyst, from titanium tetrachloride [7550-45-0] and isopropyl alcohol. 

High purity tetraalkyl titanates can be obtained by a process whereby the Hquid organic titanate esters are subjected to partial hydrolysis to form a sohd that can be separated from the reaction mass. The remaining Hquid is distilled to give a high purity product (4). For example, tetraisopropyl titanate purified in this manner contains ... 

Increased molecular association iacreases viscosity. Tetra-/-butyl titanate and tetraisopropyl titanate are mobile Hquids at room temperature tetra- -butyl titanate and tetra- -propyl titanate, TYZOR NPT [3087-37-4], are thick and sympy. The boiling poiats of these materials also reflect association (Table 1). 

Addition of one mole of P,P -dipheny1methy1enediphosphinic acid to tetraisopropyl titanate gives a chelated product, the solutions of which can be used as a primer coat for metals to enhance the adhesion of topcoats, eg, alkyds, polyalkyl acylates, and other polymeric surface coating products, and improve the corrosion resistance of the metal to salt water (102). 

Auf ahnliche Weise erhalt man am Blei aus Aceton Tetraisopropyl-1 bzw. Tetrabutyl-(2)-blei aus Butanon8. 

Tetraathyl- 624 Tetrabutyl-(2)- 609 Tetrakis-[2-cyan-athyl]- 624 Tetraisopropyl- 609 Tetramethyl- 624 Trimethyl- -chlorid 486 Trimethyl- -hydrid 486... 

Tetraisopropyl Pyrophosphate. This ester, a water-white liquid, has been prepared by Toy (47) in 94% yield from diisopropyl chlorophosphate and water in the presence of pyridine. The ester is insecticidal and is about one tenth as toxic to white mice as tetraethyl pyrophosphate. An insecticidal dust of much greater stability than tetraethyl pyrophosphate dust can be formulated from tetraisopropyl pyrophosphate, inasmuch as the tetraisopropyl ester hydrolyzes at approximately V50th the rate at which the tetraethyl ester breaks down in the presence of moisture. 

Miyazaki, T., Akita, H., Ishida, E., Ashizuka, M. and Ohtsuki, C. (2006) Synthesis of bioactive organic-inorganic hybrids from tetraisopropyl titanate and hydroxyethylmethacrylate. Journal of the Ceramic Society ofJapan, 114, 87-91. 

PPTS, Pyridinium p - toluene s u I fo n ate SE, 2-Trimethylsilylethyl TBDMS, ferf-Butyl-dimethylsilyl TBDPS, ferf-Butyldiphenylsilyl TEMPO, 2,6,6-Tetramethyl-l-piperidi-nyloxy Tf, Trifluoromethanesulfonyl THF, Tetrahydrofuran THP, Tetrahydropyran TIPDS, l,l,3,3-Tetraisopropyl-l,3-disiloxanyl TMS, Trimethylsilyl. 

Tetrahydropyridines, 21 111 Tetrahydroquinolines, 21 187,192,198-199 Tetrahydroxyalkylethylenediamine titanate complexes, 25 95 Tetrahydroxyborate anion, 4 256-258 Tetrahydroxycuprate, 7 770 Tetrahymena, ribozyme from, 17 618, 619 Tetrairidium dodecacarbonyl, 16 63 Tetraisopropyl titanate, 25 92 Tetrakaidecahedron structure, 12 8 Tetrakis(2,4-di-lerl-butylphenyl)-4,4 -biphenylenediphosphonite, 3 114 Tetrakis(2-chloroethyl)... 

Tetraalkyl titanates are the most commonly used catalysts for PBT polymerization [8], The varieties of titanates include tetraisopropyl titanate (TPT), tetrabutyl titanate (TBT) and tetra(2-ethylhexyl) titanate (TOT). Titanates effectively speed the reaction rate with few detrimental effects on the resin. Alkoxy zirconium and tin compounds, as well as other metal alkoxides, may also be used in PBT polymerization. 

TetraIsopropyl titanate Isopropyl alcohol, titanium (4+) salt ... 

It is significant to note that polymer obtained by dimethylformamide initiation does not contain initiator fragments. Polymer obtained by initiation with tetraisopropyl titanate contains an isopropoxy end that is hydrolyzable to —SCF=0. 

When tetraisopropyl titanate is used as the initiator, Be is (CH3)2CHOe. As indicated earlier, the polymer obtained has isopropoxy on the leading end and CF=S on the terminal end. Hydrolysis of the isopropoxy is responsible for CF=0 and chain transfer as a result erf Fe initiation leads to CF3S— ends. 

Copolymerization of thiocarbonyl fluoride and perfluorothioacetyl fluoride, CF3CF==S, have been done in ether at —80° C using N-methylmorpholine and tetraisopropyl titanate as initiators. The products, which contain 13-40% of the acid fluoride, are of relatively low molecular weight, do not melt very much lower than the homopolymer, and are much less elastic than the copolymer. 

Tetraisopropyl titanate Isopropyl alcohol, titanium (4+) salt, 2-Propanol, titanium (4+) salt (546-68-9), 65, 230 Tetrakis(acetonitrile)palladium tetrafluoroborate, (21797-13-7),... 

C. H. M. Verdegaal, P. L. Jansse, J. F. M. de Roolj, and J. H. van Boom, Acid-catalysed isomerization of the tetraisopropyl-disiloxane-1,3-diyl group. Simultaneous protection of the secondary alcoholic functions, Tetrahedron Lett., 1371 (1980). 

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