نتایج جستجو برای: type ii halogenhalogen contacts are halogen bonds

تعداد نتایج: 6157948  

2014
Niklas Koch Wilhelm Seichter Monika Mazik

In the title compound, C36H24Br3N3O6·C7H8, the toluene solvent mol-ecule is associated with the receptor mol-ecule via C-H⋯π bonding. The planes of the phthalimido groups are inclined at 77.0 (1), 63.0 (1) and 77.8 (1)° with respect to the benzene ring. The mol-ecular conformation is stabilized by C-H⋯O and C-H⋯Br hydrogen bonds. The crystal structure features non-classical hydrogen bonds of th...

Journal: :Acta Crystallographica Section A Foundations and Advances 2014

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه لرستان - دانشکده علوم پایه 1392

‎in this article‎, ‎we have focused one some basic and productive information about the properties of spectrum and singular values related to compact operators which are ideals in a c*-algebra of bounded operators‎. ‎considering a two-sided connection between the family of symmetric gauge functions on sequence of singular values of compact operators and symmetric norms on finite dimensional ope...

Journal: :Acta Crystallographica Section A Foundations and Advances 2015

2015
Gerhard Laus Volker Kahlenberg Herwig Schottenberger

The title compound, (C10H21N3)[CuCl4], is composed of one 1-[2-(di-ethyl-aza-nium-yl)eth-yl]-3-methyl-imidazolium dication and a tetra-chlorido-cuprate(II) dianion. The anion adopts a distorted tetra-hedral geometry. Bifurcated interionic N-H⋯Cl hydrogen bonds and several C-H⋯Cl contacts are observed, leading to a layer-like arrangement of the components parallel to (100).

Journal: :European journal of orthodontics 2004
A P Pettemerides M Sherriff A J Ireland

The purpose of this study was to compare the effectiveness of a plasma arc lamp with a conventional tungsten quartz halogen lamp in orthodontic bonding. Twenty consecutive patients had their brackets bonded either with Transbond XT (n = 10) or Fuji Ortho LC (n = 10). In total, 352 teeth were bonded, 176 in each group. Using a randomized cross-mouth control study design, where diagonally opposit...

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