Selective Formation of Alkoxo-bridged Titanium(IV) Polynuclear Complexes with Polyaminopolycarboxylate: First Titanium(IV) Octanuclear Complex Containing Cubic-type {Ti4((mu)-oxo)4}2((mu)-alkoxo)4 Core

Two kinds of alkoxo-bridged Ti(IV) polynuclear complexes were selectively obtained depending on reaction conditions. Crystal structures of the dinuclear complex [Ti2((mu)-dptaO)2]2- and the novel octanuclear complex [{Ti4((mu)-O)4}2((mu)-dptaO)4]4(H4dptaOH = 2-hydroxypropane-1,3-diamine-N,N,Nʹ,Nʹ-tetraacetic acid) were determined. The obtained complexes were spectrochemically characterized.