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The synthesis and characterization of seven new titanium catechol-based complexes are reported. The results have shown that a coordinated 2-propanol is observed in all the structures, which is involved in hydrogen bonding to one of the isopropoxide ligands, and the complexes are screened for the ring-opening polymerization (ROP) of epsilon-caprolactone at room temperature.

A cationic aminophenoxy-aluminium compound has been synthesized and its solid-state structure analyzed. Four H2salen aluminium derivatives have also been synthesized and structurally analyzed. The derivatives have varying counterions. Dimer formation via weak NH hydrogen bonded Cl- ions is found in three of the compounds. Ionic lattice-type structures are found in the rest.

The analysis describes the synthesis, characterization and the structure of a molecular trinuclear barium aminebis(phenolate) complex. The results show that the complex can be easily used as an initiator for the ring-opening polymerization of several cyclic esters.

An air-stable titanium-organic framework, prepared from Ti(OPr)4 and 1,4-butanediol, is characterized through single-crystal X-ray diffraction, revealing a unique supermolecular structure. Its functionality as a high active initiator for the ring-opening polymerization of cyclic esters is also demonstrated.

The application of aminetris(phenoxide) ligands to Bi and Sb chemistry, resulting in the structural characterization of an isolated Bi 'inverted-sandwich' complex, which is well-defined and hydrocarbon-soluble, is reported. The density functional theory calculations of the sandwich bismuth arene complex have indicated the presence of a weak sigma*-2pi interaction.

The series of alkali-metal (Li, Na, K) complexes of the substituted benzyl anion 3,5-dimethylbenzyl (Me2C6H3CH2-) derived from 1,3,5-trimethylbenzene (mesitylene) have been coerced into monomeric forms by supporting them with the tripodal tetradentate Lewis donor tris(N,N-dimethyl-2-aminoethyl)amine, [N(CH2CH2NMe2)3, Me6TREN]. Molecular structure analysis by X-ray crystallography establishes that the cation-anion interaction varies as a function of the alkali-metal, with the carbanion binding to lithium mainly in a σ fashion, to potassium mainly in a π fashion, with the interaction toward sodium being intermediate between these two extremes. This distinction is due to the heavier alkali-metal forcing and using the delocalization of negative charge into the aromatic ring to gain a higher coordination number in accordance with its size. Me6TREN binds the metal in a η4 mode at all times. This coordination isomerism is shown by multinuclear NMR spectroscopy to also extend to the structures in solution and is further supported by density functional theory (DFT) calculations on model systems. A Me6TREN stabilized benzyl potassium complex has been used to prepare a mixed-metal ate complex by a cocomplexation reaction with tBu2Zn, with the benzyl ligand acting as an unusual ditopic σ/π bridging ligand between the two metals, and with the small zinc atom relocalizing the negative charge back on to the lateral CH2 arm to give a complex best described as a contacted ion pair potassium zincate. [ABSTRACT FROM AUTHOR]