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Describes the convenient large scale synthesis of crystalline trilithium salt [Li3(NN'3)(THF)3], and determines its molecular structure. Conversion to the solvent free compound [Li3(NN'3)]; Information on these two compounds; Molecular structure of [Li3(NN'3)(THF)2]; Synthesis of the two compounds; Conclusion drawn with regards to lithiated triamidoamine.

The complexes FeL2 [L = bidentate Schiff base ligands obtained from (R)-(+)-α-phenylethanamine and 4-substituted salicylaldehydes, substituent R = H, tBu, NO2, OMe, CN, OH] react with ditopic proligands 1,4-pyrazine (pz) or 4,4′-bipyridine (bpy), to give a family of optically pure Fe(II) polymeric chain complexes of formula {FeL2(μ-pz)}∞ and {FeL2(μ-bpy)}∞. Crystallographic studies show that a range of structures are formed including unidirectional and bidirectional linear polymers and canted zigzag chains. Interchain interactions via π-contacts and hydrogen bonding are also observed. SQuID magnetometry studies on all of the complexes reveal antiferromagnetic interactions, the magnitudes of which are rationalized on the basis of substituent electronic properties and bridging ligand identity. For complexes with bridging pz, the antiferromangnetic interaction is enhanced by electron-releasing substituents on the Fe units, and this is accompanied by a contraction in the intrachain distance. For complexes bridged with the longer bpy the intrachain antiferromagnetic couplings are much weaker as a result of the longer intrachain distance. The magnetic data for this series of chain complexes follow a Bonner-Fisher 1D chain model, alongside a zero field splitting (ZFS) model for Fe(II) (S = 2) as appropriate. The intrachain antiferromagnetic coupling J values, g-factors, and the axial ZFS parameter D were obtained. [ABSTRACT FROM AUTHOR]

A new family of optically pure tetrathiafulvalenium and tetraselenafulvalenium salts, D3[MIII(S,S-EDDS)]2·nH2O (where D = TTF, TSF; M = Co, Fe, Cr; EDDS = ethylenediaminedisuccinato), were synthesized electrochemically. These phases are semiconductors with conductivities between 6.9 × 10-6 and 1.3 × 10-5 S·cm-1 (Eaca. 0.3 eV) for TTF and 2.8 × 10-4 to 2.8 × 10-5 S·cm-1 (Eaca. 0.1 eV) for TSF compounds. While some crystals suffer from twinning, other well resolved structures consist of TTF/TSF stacks which, under the influence of the chiral anion, exhibit a periodic undulation described by an elliptical helix. The crystallographic data, along with computational work, indicate charge localization in the semiconducting motifs. [ABSTRACT FROM AUTHOR]