THE QUEST FOR SINGLE-SOURCE PRECURSORS FOR BATIO3 AND SRTIO3

The reactions between titanium alkoxides Ti(OR)(4) (R = Et, iPr) and s trontium beta-diketonates Sr(beta-dik)(2) (beta-dik = thd, acac) were investigated. The various Sr-Ti species, Sr2Ti2(beta-dik)(4)(OR)(8), h ave a 1:1Sr:Ti stoichiometry and were characterized by elemental analy sis, FT-IR and by single-crystal X-ray diffraction for Sr2Ti2(mu(3)-Oi Pr)(2)(mu-OiPr)(4)(OiPr)(2)(thd)(4) (1) The hydrolysis-polycondensatio n reactions of the various species were investigated and the resulting powders analyzed by light scattering and XRD. While acetone was found to have little influence on the hydrolysis reactions of the Sr-Ti spe cies, polycondensation of Ti(OiPr)(4) in neat acetone offers a trinucl ear enolate Ti(mu(3)-O)(2)(OCMe=CH2)(3)(OiPr)(5)(iPrOH) (4). Compariso ns between the Ba-Ti and Sr-Ti systems are given.