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Preparation of Carboxylato‐Coordinated Titanium Alkoxides from Carboxylic Anhydrides: Alkoxido Group Transfer from Metal Atom to Carbonyl Group
Author(s) -
Czakler Matthias,
Artner Christine,
Schubert Ulrich
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201200296
Subject(s) - chemistry , phthalic anhydride , acetic anhydride , titanium , acetic acid , isopropyl alcohol , isopropyl , medicinal chemistry , metal , ligand (biochemistry) , alcohol , carboxylate , carboxylic acid , polymer chemistry , organic chemistry , catalysis , receptor , biochemistry
Reaction of titanium(IV) isopropoxide, Ti(O i Pr) 4 , with an equimolar amount of phthalic anhydride resulted in the transfer of an isopropoxido group from the metal atom to one carbonyl group of the anhydride and coordination of the thus formed monoester to the titanium atom. One monoester ligand in Ti 2 (O i Pr) 6 (μ 2 ‐OOC‐C 6 H 4 ‐COO i Pr)(η 1 ‐OOC‐C 6 H 4 ‐COO i Pr)( i PrOH) is bridging and the other is η 1 ‐coordinated. When the reaction is performed in the presence of 1 mol‐equiv. of acetic acid, the oxido cluster Ti 6 (μ 3 ‐O) 6 (O i Pr) 6 (μ 2 ‐OOC‐C 6 H 4 ‐COO i Pr) 6 was instead obtained. The μ 3 ‐oxygen groups in the latter compound are due to esterification of acetic acid by the cleaved isopropyl alcohol.