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Acetic Acid Mediated Synthesis of Phosphonate‐Substituted Titanium Oxo Clusters
Author(s) -
Czakler Matthias,
Artner Christine,
Schubert Ulrich
Publication year - 2014
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.201400051
Subject(s) - phosphonate , chemistry , acetic acid , titanium , trimethylsilyl , cluster (spacecraft) , medicinal chemistry , condensation , stereochemistry , organic chemistry , physics , computer science , thermodynamics , programming language
New phosphonate/acetate‐substituted titanium oxo/alkoxo clusters were prepared from Ti(O i Pr) 4 and bis(trimethylsilyl) phosphonates in the presence of acetic acid, which served to generate water in situ through ester formation. The process led to clusters with a higher degree of condensation than in previously known phosphonate‐substituted titanium oxo clusters. The clusters [Ti 6 O 4 (O i Pr) 10 (OAc) 2 (O 3 PR) 2 ] (OAc = acetate) were obtained for a large variety of functional and non‐functional groups R under a range of reaction conditions. This cluster type, which is also retained in solution, therefore appears to be very robust. Two other clusters, [Ti 5 O(O i Pr) 11 (OAc)(O 3 PCH 2 CH 2 CH 2 Br) 3 ] and [Ti 5 O 3 (O i Pr) 6 (OAc) 4 (O 3 P‐xylyl) 2 ], were only isolated in special cases.