Total emission and CPL spectra of three 9-coordinate, C3 symmetric Eu(iii) complexes with well-defined speciation show that their ligand fields are very sensitive to solvent polarity, even if is not present in the first coordination sphere.

Solvent-assisted ligand incorporation (SALI) is useful for functionalizing the channels of metal-organic framework (MOF) materials such as NU-1000 that offer substitutionally labile zirconium(IV) coordination sites for nonbridging ligands. Each of the 30 or so previous examples relied upon coordination of a carboxylate ligand to achieve incorporation. Here we show that, with appropriate attenti...

The liquid-liquid phase separation of a binary solvent can be arrested by colloidal particles trapped at the interface [K. Stratford, Science 309, 2198 (2005)]. We show experimentally that the colloidal network so formed can remain stable after fully remixing the liquids, creating a new type of gel in which colloids in a single-phase solvent have locally planar coordination. We argue that this ...

In the title compound, [Co(SO4)(C12H8N2)2]·C3H8O2, the Co(II) atom (site symmetry 2) has a distorted octa-hedral coordination composed of four N atoms from two chelating 1,10-phenanthroline ligands and two O atoms from an O,O'-bidentate sulfate ligand, in which the S atom has site symmetry 2. The dihedral angle between the two chelating N2C2 groups is 84.46 (15)°. The complex and solvent mol-ec...

The improved synthesis and characterization of tetra-pyrazine-platinum(II) bis-(tetra-fluoro-borate) acetonitrile hemisolvate, [Pt(C(4)H(4)N(2))(4)](BF(4))(2)·0.5CH(3)CN, is reported. The unit cell contains a half equivalent of an acetonitrile solvent mol-ecule per tetra-pyrazine-platinum(II) ion. The coordination geometry of the Pt(II) ion is almost square-planar, with the Pt atom residing on ...

In the title compound, [Ti2(C16H14N2O2)2O2]·2CHCl3, the Ti(IV) atom in the centrosymmetric complex has a distorted octa-hedral N2O4 coordination environment and is linked via two μ2-oxido bridges into a dinuclear centrosymmetric com-plex, with a Ti⋯Ti separation of 2.7794 (8) Å. In the salen (N,N'-ethyl-enebis(salicyl-imine)) ligand, the two salicyl-imine units make a dihedral angle of 45.31 (5...

The title compound, C(26)H(23)BrN(6), has been synthesized as a potential ligand for the construction of metal-organic frameworks. The three benzimidazolyl groups present three potential coordination nodes. The dihedral angles between the benzimidazole ring systems are 74.03 (10), 66.49 (9) and 74.09 (9)°. The structure contains large voids, which contain highly disordered solvent mol-ecules th...

The title compound, [PtCl(2)(C(21)H(33)P)(2)]·C(3)H(6)O, crystallizes with an accompanying acetone solvent mol-ecule. The metal atom shows a distorted square-planar coordination environment, with a P-Pt-P angle of 172.41 (3)° as the most prominent feature. Both isopropyl fragments were treated as disordered over two conformations with occupancy ratios of 0.55 (2):0.45 (2) and 0.58 (2):0.42 (2)....

The title mononuclear complex, [Cu(C(18)H(12)N(2)O(2))(C(12)H(8)N(2))]·CH(3)OH, contains one N'-[(2-oxidonaphthalen-1-yl)methyl-idene]benzohydrazidate ligand (L(2-)), a Cu(2+) cation, one 1,10-phenanthroline ligand and a methanol solvent mol-ecule. The Cu(II) ion adopts a CuO(2)N(3) distorted square-pyramidal coordination. An O-H⋯O hydrogen bond is formed between the methanol solvent mol-ecule ...