Crystal Structures: Chapters 11 and 12 (Wyckoff, W. G.)

Crystal structure of 12-benzyl­sulfanyl-2,9-di­bromo-6H-dibenzo[b,g][1,8]naphthyridin-11-one

The hetero-tetra-cene skeleton of the title mol-ecule, C23H14Br2N2OS, is defined by linear annulation of four six-membered rings, including two N heteroatoms. This moiety is nearly planar (r.m.s. deviation = 0.055 Å), with a slight twist of 4.1 (2)° between the two halves of the aromatic system. The dihedral angle between the least-squares plane of the skeleton and the benzyl group is 24.5 (3)°...

Toric Varieties Chapters 8 – 11 David Cox

Preparation and Crystal Structures of Th5Fe19P 12 and ThFe4P2

The new compounds Th5F e19P 12 and ThFe4P2 were prepared by reaction o f the elemental components in a tin flux and their crystal structures were determined from single-crystal X-ray data. Th5F e19P12 crystallizes with a new monoclinic structure type: C2/m, a = 2920.3(3), b = 379.18(3), c = 931.48(8) pm, ß = 103.36(1)°, Z = 2, R = 0.031. ThFe4P2 is isotypic with SmNi4P2: Pnnm, a = 1448.9(2), b ...

New G-protein-coupled receptor crystal structures: insights and limitations.

G-protein-coupled receptors (GPCRs) constitute a large family of structurally similar proteins that respond to a chemically diverse array of physiological and environmental stimulants. Until recently, high-resolution structural information was limited to rhodopsin, a naturally abundant GPCR that is highly specialized for the detection of light. Non-rhodopsin GPCRs for diffusible hormones and ne...

Temperature Tunability of Dielectric/ Liquid Crystal / Dielectric Photonic Crystal Structures

Recently, photonic crystals doped with liquid crystal (LC) material havegained much research interest. In this article new ternary one-dimensional photoniccrystal introduced and studied. The liquid crystal layer of 5CB and 5PCH is sandwichedby two dielectric layers. For the first time, we use four structures SiO2/UCF35/CaF2,SiO2/5CB/CaF2, NFK51/UCF35/NPSK53 and NFK51/5CB/NPSK53. The effect ofte...