Copper coordination polymers based on single-chain or sheet structures involving dinuclear and tetranuclear copper(II) units: synthesis, structures, and magnetostructural correlations.

Reactions between the potentially pentadentate (N(2)O(3)), trianionic double Schiff-base ligand 2,6-bis[[(2-hydroxyethyl)imino]methyl]-4-methylphenol (H(3)L) and Cu(CH(3)CO(2))(2) or Cu(ClO(4))(2), in the presence of NaN(3), give novel coordination polymers with chain {[Cu(2)(H(2)L)(N(3))(3)](2).H(2)O}(n) (1) or sheet [Cu(2)(H(2)L)(N(3))(3)](n) (2) and [Cu(2)(HL)(N(3))](n)[ClO(4)](n) (3) structures, respectively. These clusters are comprised of repeating dinuclear units (1) or their dimers (2 and 3).

Five- and Six-Coordinate Group 4 Compounds Stabilized by beta-Ketiminate and Diketiminate Ligands: Syntheses and Comparisons between Solid-State and Solution Structures.

The preparation and reaction chemistry of beta-diketiminate titanium and zirconium complexes is described. Amine elimination reactions work well for introducing Tolnacnac or Tolnacac to the metal centers (TolnacnacH = 2-(p-tolylamino)-4-(p-tolylimino)-2-pentene; TolnacacH = 4-p-toluidinopent-3-en-2-one). In certain cases, the iminium salt of the diketimine can be used to circumvent the unfavorable reaction kinetics.