L'utopia del progetto urbano contemporaneo a "misura d'uomo". Il caso studio di una città termale.

In the contemporary urban age, planners and architects are looking for new utopias for the city and urban life at the human scale, after the end of the functional city age. The paper proposes a perspective in which contemporary urban project finds its strength starting from open and public space. Proximity and territory are focused as new utopias and dystopias for the contemporary city. The materials and references of this approach are presented through the case study of a "small place with high identity": Salsomaggiore Terme, a ville d'eau in which urban development is historically generated around a central open space that still dominates completely the urban and territorial scene

CCDC 229683: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures

Conserved hydrogen-bonded supramolecular synthons in pyridinium tetrachlorometallates

The crystal and molecular structures of the pyridinium tetrahalometallates, [Hpy]2[CoCl4] and [Etpy]2[CoCl4], have been determined and compared with those of other pyridinium tetrahalometallates and 4,4'-bipyridinium perhalometallates. The pyridinium cation in [Hpy]2[CoCl4] uses its heterocyclic N–H and 4-positioned C–H moieties to form bifurcated hydrogen-bonds to tetrahalometallate anions and thus generate organic–inorganic hybrid solids similar in composition to those formed by 4,4-bipyridinium perhalometallate salts. Although the supramolecular synthons based on C–H donors are longer, and by inference, less strong, than those based on N–H donors, they are nonetheless, structure determining. The hydrogen-bonding capability of the ethylpyridinium cation is restricted to C–H donors and hence is not structure determining, the layered hexagonal network structure of [Etpy]2[CoCl4] being dominated by π–π stacking interactions

1-(4-Pyridinio)-2 '-[4-pyridinio-(E)-methylidene]-hydrazide dinitrate

The title compound, C12H12N4O2+·2NO3-, crystallizes as 1-(4-pyridinio)-2'-[4-pyridinio-(E)-methyl­idene]­hydrazide cations and nitrate anions. An extensive hydrogen-bonding network, primarily N-H...O interactions, but with supporting C-H...O contacts, leads to a three-dimensional matrix structure, which is best considered as a cationic framework with bridging nitrate anions. The basic feature of the cationic framework is a zigzag chain, which runs along the [101] direction. The chains pack to generate two-dimensional sheets which lie parallel to the (101) plane and stack in the [\overline 101] direction to give the three-dimensional matrix

CCDC 229684: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures

Triaqua(2,6-pyridinedicarboxylato)copper(II) at 150 K

The asymmetric unit of the title compound, [Cu(C7H3NO4)(H2O)3], comprises a distorted tetragonally elongated octa­hedral copper(II) centre coordinated equatorially by a tridentate 2,6-pyridine­di­carboxyl­ate anion [Cu-N 1.9093 (14), and Cu-O 2.0368 (11) and 2.0397 (11) Å] and a strongly bound water mol­ecule [Cu-O 1.9047 (12) Å] and axially by two weakly bound water mol­ecules [Cu-O 2.3631 (12) and 2.4739 (12) Å]. The extended structure is based on a layered arrangement in which sheets of stacked molecular units are alternately linked by hydrogen-bonding and [pi]-[pi] stacking interactions

CCDC 180225: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures