In the organic/inorganic salt hydrate, 6C7H9ClN(+)·P6O18 (6-)·2H2O, the cyclo-hexa-phosphate anion resides on an inversion centre. The asymmetric unit consists of three cations, one half-anion and a water mol-ecule. In the crystal, the water mol-ecules and the [P6O18](6-) anions are linked by O-H⋯O hydrogen bonds, generating infinite layers parallel to the ab plane. These layers are inter-conne...

In the title compound, C(20)H(20)N(2)O, the dihedral angle between the quinoline ring system and the phenyl ring is 49.40 (5)°. In the crystal structure, zigzag layers of mol-ecules, in which the quinoline units are parallel to the (10) plane, are arranged perpendicular to the b axis. Inter-molecular N-H⋯O hydrogen bonds connect the mol-ecules into chains along [010], reinforcing the cohesion b...

In the title compound, [Y(2)(C(4)H(4)O(4))(2)(C(2)O(4))(H(2)O)(2)](n), the flexible succinate anion assumes a gauche conformation and bridges the eight-coordinated Y atoms, generating two-dimensional layers parallel to (010). The coordination polymer layers are linked into a three-dimensional framework by the rigid oxalate ligands. The oxalate ions are located on a center of inversion. Inter-mo...

In the title compound, [Co(C(12)H(15)O(4))(2)(H(2)O)(2)](n), adjacent Co(II) atoms ( symmetry) are bridged by 3-carboxy-adamantane-1-carboxyl-ate anions, forming a chain running along [001]. Inter-chain O-H⋯O hydrogen bonds link the chains into layers parallel to (100); the layers are further connected via inter-layer hydrogen bonds inter-actions, forming a three-dimensional framework.

The title compound, C(20)H(19)NO, is a substructure of CP-640186, a potent inhibitor of mammalian acetyl-coenzyme A carboxyl-ases. In the crystal structure, the amide group forms a dihedral angle of 87.0 (1)° with the plane of the anthracene unit and the piperidine ring adopts a chair conformation. Mol-ecules are arranged into layers parallel to (100) and adjacent anthracene units within layers...

The recent shift in computer system design to multi-core technology requires that the developer leverage explicit parallel programming techniques in order to utilize available performance. Nevertheless, developing the requisite parallel applications remains a prohibitively-difficult undertaking, particularly for the general programmer. To mitigate many of the challenges in creating concurrent s...

We study the inviscid limit problem of the incompressible flows in the presence of both impermeable regular boundaries and a hypersurface transversal to the boundary across which the inviscid flow has a discontinuity jump. In the former case, boundary layers have been introduced by Prandtl as correctors near the boundary between the inviscid and viscous flows. In the latter case, the viscosity ...

Article history: Received 5 June 2009 Revised 2 March 2010 Available online 12 August 2010 Extending investigations of Barker, Humpherys, Lafitte, Rudd, and Zumbrun for compressible gas dynamics and Freistühler and Trakhinin for compressible magnetohydrodynamics, we study by a combination of asymptotic ODE estimates and numerical Evans function computations the one-dimensional stability of para...

In the title compound, [Mn(C(12)H(8)N(2))(2)(H(2)O)(2)]SO(4)·6H(2)O, the complex cations assemble into positively charged sheets parallel to (010) via inter-molecular π-π stacking inter-actions with a mean interplanar distance of 3.410 (6) along [100] and 3.465 (5) Å along [001]. The sulfate anions and uncoordinated water mol-ecules are inter-connected between these layers by hydrogen bonds, fo...

High temperature superconductors have in common that they consist of parallel planes of copper oxide separated by layers whose composition can vary. Being ceramics, the cuprate superconductors are poor conductors above the transition temperature, Tc. Below Tc, the parallel Cu-O planes in those materials become superconducting while the layers in between stay poor conductors. Here, we ask to wha...