In the title Ho(III)-erythritol complex, [Ho(NO3)3(C4H10O4)(C2H5OH)], the Ho(III) cation is chelated by a tridentate erythritol ligand and three bidentate nitrate anions. An ethanol mol-ecule further coordinates the Ho(III) cation, completing the irregular O10 coordination geometry. In the crystal, an extensive O-H⋯O hydrogen-bond network links the mol-ecules into a three-dimensional supra-mole...

In the title coordination polymer, [Co(C(14)H(16)O(6))(H(2)O)(2)](n), the Co(II) ion, situated on a twofold rotation axis, is coordinated by four O atoms from two 4,4'-[1,4-phenyl-enebis(-oxy)]dibutano-ate (L) ligands and two water mol-ecules in a highly distorted octa-hedral geometry. Each L ligand is situated on an inversion center and bridges two Co(II) atoms, forming a zigzag polymeric chai...

In the title compound, [Li(2)(CF(3)SO(2)NSO(2)CF(3))(2)(CH(3)CN)(2)](n), two Li(+) cations reside on crystallographic inversion centers, each coordinated by six O atoms from bis(trifluoromethanesulfonyl)imide (TFSI(-)) anions. The third Li(+) cation on a general position is four-coordinated by two anion O atoms and two N atoms from acetonitrile mol-ecules in a tetra-hedral geometry.

In the title compound, {[Cd(C(10)H(8)O(4))(H(2)O)(3)]·2H(2)O}(n), penta-gonal-bipyramidally coordinated Cd(II) ions on a twofold rotation axis are linked by tethering 1,4-phenyl-enediacetate (1,4-phda) ligands into [Cd(1,4-phda)(H(2)O)(3)](n) coordination polymer chains. The chain motifs are oriented parallel to the c-axis direction. Individual chains are connected into a supra-molecular networ...

In the title complex, [Pb(C(9)H(11)NO(2))(2)(NO(3))(H(2)O)(2)]NO(3), the cation is a monomeric species including zwitterionic amino-acids. In both zwitterions, rotation of the NH(3) (+) groups about their C-N bonds is blocked by inter-molecular N-H⋯O hydrogen bonds. Assuming a limit for Pb-O bond lengths of 3 Å, the Pb(II) ion is coordinated by eight O atoms. Each phenyl-alaninate ligand coordi...

This article is an introduction to the L~-cohomology of arithmetic symmetric spaces. We shall describe properties of automorphic representations which lead to a remarkable interplay among Hodge structures, Lefschetz structures, and Hecke operators. In order to make the discussion slightly more concrete, we shall focus on the special case of Siegel moduli space. Resume. Cet article est une intro...

The title complex, [Mn(NCS)(2)(C(13)H(19)NO(4))] {systematic name: [3,6,9,12-tetra-oxa-18-aza-bicyclo-[12.3.1]octa-cosa-14(18),15,17-triene-κ(5)N,O,O',O'',O''']bis-(thio-cyanato-κN)manganese(I-I)}, was obtained by the reaction of MnCl(2)·4H(2)O and NaSCN with pyridino-15-crown-5. The Mn(2+) center has a distorted penta-gonal bipyramidal coordination geometry, coordinated by four O atoms and one...