Complexation of titanium alkoxides with pentenoic acid and allylacetoacetate and their hydrolysis and addition reactions with H‐silanes

Abstract

Complexation reactions of titanium tetraethoxide [Ti(OEt) 4 ] and titanium tetra-n-butoxide [Ti(OBu n ) 4 ] with 3-pentenoic acid (PA) and allylacetoacetate (AAA), in a 1 : 1M ratio, were studied in ethanol solution at room temperature.13 C-NMR and FTIR spectra showed that all PA and AAA completely reacted with both titanium alkoxides. Hydridosilane compounds such as triethoxysilane and triethylsilane were added to titanium chelate complexes in a 1 : 1M ratio. The investigation of products by 13 C-and 29 Si-NMR and FTIR showed additions of -SiH to the CAC double bond. The hydrolysis of titanium-PA and AAA complexes, by water in 1 : 4 ratios, resulted in released PA in an amount of 10% and AAA of 20%. The stability of hydrolyzed products was investigated by 13 C-NMR, 29 Si-NMR, and FTIR.

Ring-opening polymerization of isopropylglycidyl ether (IPGE) with new catalysts of Ti, Sn, Al-alkoxides and comparison of its reactivity

“…This can be related to the large size of tin atom. All of these values are consistent with those detected in a number of carboxylate-metal(IV or III) derivatives [13,[15][16][17][18][19][20][21][22].…”

Novel Sol–Gel Precursors for Thin Mesoporous Eu3+-Doped Silica Coatings as Efficient Luminescent Materials.

“…In addition, a second single-source precursor SSP2-Eu ( 4 ) was synthesized based on 5-(triethoxysilyl)pentanoic acid ( 3 ) and was also applied for the complexation of europium(III) ions and finally for the preparation of europium(III)-doped silica films. 25 These precursors now serve different functions. First of all, the rate of condensation of europium is controlled via the coordinative linkage to the organosilane, and second, based on the stable coordination, europium and silicon are positioned in close proximity to each other in the final material, thus phase separation in a silica-rich and europium oxide-rich phase is hindered.…”

Complexation of Zirconium Alkoxides with 3-Pentenoic Acid and Hydrolytic Stability of Their Products

“…Triethoxysilane and triethylsilane were added to titanium-chelate complexes in 1:1 molar ratio (Ti-alkoxide/H-silane). The investigation of products by 13 C and 29 Si NMR showed addition of Si-H to C=C double bond [20].…”