X-ray structure and Raman spectrum of [Ti-4(mu(3)-O)(2)(mu 2-(OPr)-Pr-i)(2)((OPr)-Pr-i)(8)(acac)(2)]: Presence of a Ti-4(mu(3)-O)(2)(mu(2)-(OPr)-Pr-i)(2) ladder-like core

摘要

The partial hydrolysis of titanium tetraisopropoxide in the presence of acetylacetone yields the complex [Ti-4(mu(3)-O)(2)(mu(2)-(OPr)-Pr-i)(2)((OPr)-Pr-i)(8)(acac)(2)] in which [(acac)((OPr)-Pr-i)(2)TiO((OPr)-Pr-i)Ti((OPr)-Pr-i)(2)] units are linked into dimers via the bridging oxide ion to form a ladder-like Ti-4(mu(3)-O)(2)(mu(2)-(OPr)-Pr-i)(2) core containing five-and six-coordinate titanium and three-coordinate oxide ions that link the two units together through bonds to the five-coordinate titanium atoms. The Raman spectrum shows bands at 521 and 712 cm(-1) that are assigned to nu(Ti-O) modes of bridging isopropoxide ligands and the mu(3)-oxygen, respectively. [References: 26]