A facile route to hetero-bimetallic Ti(IV)-alkali metal calix[4]arene complexes

A.J. Petrella, D.C. Craig, R.N. Lamb, Colin Raston, N.K. Roberts

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17 Citations (Web of Science)


Deprotonation of calix[4]arenes by alkali metal in methanol using simple benchtop procedures is effective in the formation of novel monomeric and dimeric titanium(IV) complexes. For the larger alkali metal cations, K+ and Cs+, favourable complexation within the pi-basic calix[4]arene cavity facilitates the formation of monomeric titanium(IV) complexes when oligomer formation is inhibited by an acetylacetonate ligand. In contrast, the smaller Li+ and Na+ ions preferentially form dimeric complexes with exo-bridging alkali and titanium(IV) metal centres. A dimeric complex is also obtained for potassium in the absence of acetylacetonate. The solid state structures of the K-Ti and Na-Ti calix[4]arene dimer complexes show different structural characteristics depending on the nature of the alkali metal.
Original languageEnglish
Pages (from-to)4590-4597
JournalDalton Transactions
Issue number24
Publication statusPublished - 2003


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