A titanium(IV) alkoxido complex, (dpp-bian)Ti(OBn) 2 (2), as well as alkoxido chlorido complexes (dpp-bian)-TiCl(OCH 2 CH 2 OMe) (3) and (dpp-bian)TiCl 2 OBn (4), were synthesized from the titanium(IV) dichloride precursor [(dppbian)TiCl 2 ] 2 (1) by exchange with corresponding sodium salts (comps. 2 and 3) or by the alcoholysis with BnOH (comp. 4). The compounds 2-4 were fully characterized by elemental analysis, NMR or EPR, and IR spectroscopy. Molecular structures of the metal complexes in the solid state have been determined[a] G.A. Razuvaev
Invited for the cover of this issue is Dr. Alexander Morozov from the G.A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences, Nizhny Novgorod, Russian Federation. The cover image shows two basketball players representing the bis(amide) and the radical anionic ligands, with different modes of binding to the Ti metal.
The Front Cover shows a basketball workout that is like a catalytic ROP of L‐lactide driven by α‐diimine‐supported titanium coordination compounds. The color of characters refers to the degree of oxidation of the ligand. The clumsy red player holds the ball firmly, just as the bis(amide) ligand chelates the titanium ion in a σ2π‐fashion. Conversely, the blue player demonstrates his mastery, handling the ball only with fingertips. In the same manner, the weaker binding of the radical anionic ligand to the metal center enhances the catalytic activity of the appropriate titanium catalyst in highly controlled living polymerization. More information can be found in the Full Paper by A. G. Morozov et al. For more on the story behind the cover research, see the Cover Profile.
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