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H. Fric, M. Puchberger, U. Schubert:
"Contributions to the Structural Chemistry of 2-Amino Alcoholate Derivatives of Titanium and Zirconium Alkoxides and Their Partial Hydrolysis Products";
European Journal of Inorganic Chemistry, 2008 (2008), 9; 1452 - 1461.

The structures of Ti₂(OiPr)₆(OCHMeCH₂NH₂)₂ and Ti₂(OiPr)₆(OCH₂CHMeNH₂)₂, obtained by reaction of Ti(OiPr)₄ with the corresponding amino alcohols, were investigated to elucidate the structural influence of the organic substituents at the amino alcohol. A methyl group at the OH-substituted carbon atom results in a larger distortion of the structure than a methyl group at the NH₂-substituted carbon. The disubstituted compound Ti₂(OiPr)₄(OCH₂CH₂NH₂)₄ was formed, when NaTi(OiPr)₅ was reacted the amino ethanol. While one OCH₂CH₂NH₂ ligand is chelating, the oxygen atom of the second bridges the titanium atoms, and the NH₂ group is dangling.
The structures of the partial hydrolysis products Ti₄O₄(OiPr)₄(OCHPhCHMeNHMe)₄ and Ti₈O₆(OEt)₁₂(OCH₂CH₂NH₂)₈ were also investigated. The former contains an incomplete double-cube Ti₄O₄ cluster core, the latter is made of two Ti₄O₃(OEt)₆(OCH₂CH₂NH₂)₄ sub-units, with a nearly planar Ti4( μ₂-O)₂(μ₃-O)(μ₂-OEt)₂ ring system, connected by two OEt bridges. Zr(OCH₂CH₂NH₂)₄ is a mononuclear compound with four chelating amino alcoholate ligands. The structure of Zr₆(OBu)₁₈(OCH₂CH₂NH₂)₆ is assembled from two Zr₂(OBu)₅(OCH₂CH₂NH₂)₃ and two Zr(OBu)₄ sub-units, which are associated by alkoxo bridges.

http://dx.doi.org/10.1002/ejic.200701163