catena-Poly[[tris­(acetonitrile-κN)praseodymium(III)]tris­(μ-trifluoro­methane­sulfonato-κ²O:O′)]

In the colourless title compound, [Pr(CF₃O₃S)₃(CH₃CN)₃]_n, the three trifluoro­methane­sulfonate anions form three bridges via O:O′-coordination between two Pr^III atoms. The structure contains [Pr(NCMe)₃-μ₂(OTf)₃—Pr(NCMe)₃-μ₂(OTf)₃]_n (NCMe is acetonitrile; OTf is trifluoromethanesulfonate) chains parallel to the a axis. The Pr^III atom is nine-coordinate in a distorted tricapped trigonal-prismatic environment.

Bis(dimethyl sulfoxide-κO)tetra­kis­(μ₂-3,4,5-tri­meth­oxy­benzoato-κ²O:O′)dizinc

The colourless title complex, [Zn₂(C₁₀H₁₁O₅)₄(C₂H₆OS)₂], crystallizes with one half-mol­ecule in the asymmetric unit, the other half of the mol­ecule being generated by a crystallographic inversion center. The structure shows a μ₂-O:O′-bridging mode of the four 3,4,5-tri­meth­oxy­benzoate ligands finally stabilizing the two Zn^II atoms in the dinuclear complex in a distorted square-pyramidal environment. The fifth coord­in­ation site in the apical position of the pyramid is occupied by a coordinating dimethyl sulfoxide solvent mol­ecule equally disordered over two positions.

1-(5,5-Di­meth­oxy­pent­yl)-3-methyl­imidazolium-2-carboxyl­ate

The title compound, C₁₂H₂₀N₂O₄, represents one example of a zwitterionic imidazolium salt with a carboxyl­ate group at the 2-position of the imidazolium ring. The dihedral angle between the heterocyclic ring and the carboxyl­ate group is 31.3 (1)°. The side chain linking the N atom of the ring and the methine C atom has a gauche–anti–anti conformation [torsion angles = −60.3 (2), −175.7 (2) and 178.7 (2)°, respectively]. In the crystal, mol­ecules are linked by short C—H...O hydrogen bonds involving the C—H groups in the aromatic ring to generate (001) sheets.