Results 11 to 20 of about 195,184 (292)

The effects of halogen elements on the opening of an icosahedral B12 framework [PDF]

open access: yes, 2017
The fully halogenated or hydrogenated B12X12 (X = H, F, Cl, Br and I) clusters are confirmed to be icosahedral. On the other hand, the bare B12 cluster is shown to have a planar structure. A previous study showed that a transformation from an icosahedron
Gong, Liang-Fa   +5 more
core   +3 more sources

Restorative Dentistry: Dental composite depth of cure with halogen and blue light emitting diode technology [PDF]

open access: yes, 2009
Objectives To test the hypothesis that a blue light emitting diode (LED) light curing unit (LCU) can produce an equal dental composite depth of cure to a halogen LCU adjusted to give an irradiance of 300 mWcm–2 and to characterise the LCU's light outputs.
Ashworth, Stephen   +2 more
core   +1 more source

Intramolecular halogen–halogen bonds?

open access: yesPhysical Chemistry Chemical Physics, 2013
By analysing the properties of the electron density in the structurally simple perhalogenated ethanes, X3C-CY3 (X, Y = F, Cl), a previously overlooked non-covalent attraction between halogens attached to opposite carbon atoms is found. Quantum chemical calculations extrapolated towards the full solution of the Schrödinger equation reveal the complex ...
Johansson, Mikael P., Swart, Marcel
openaire   +5 more sources

The Effect of the Position of the Pyridine Nitrogen Atom in the Tridentate NN'O Schiff Base Ligand on the Type of Coordination Polymer of the Copper(II) Complex: A Crystallographic Study [PDF]

open access: yesشیمی کاربردی روز
Coordination polymers (CPs) are synthesized using bridging organic ligands and metal ions, depending on the geometric coordination of the metal, the bridging ligands, and the donor atoms present in these ligands, various one-, two-, or three-dimensional ...
Kimia Forooghi   +2 more
doaj   +1 more source

Analysis of products from the pyrolysis of plastics recovered from the commercial scale recycling of waste electrical and electronic equipment [PDF]

open access: yes, 2007
Three plastic fractions from a commercial waste electrical and electronic equipment (WEEE) processing plant were collected and investigated for the possibility of recycling them by batch pyrolysis. The first plastic was from equipment containing cathode
Hall, W.J., Williams, P.T.
core   +1 more source

Supramolecular hierarchy among halogen and hydrogen bond donors in light-induced surface patterning [PDF]

open access: yes, 2015
Halogen bonding, a noncovalent interaction possessing several unique features compared to the more familiar hydrogen bonding, is emerging as a powerful tool in functional materials design.
Barrett C. J.   +10 more
core   +1 more source

Adsorption of diatomic halogen molecules on graphene: A van der Waals density functional study [PDF]

open access: yes, 2010
The adsorption of fluorine, chlorine, bromine, and iodine diatomic molecules on graphene has been investigated using density functional theory with taking into account nonlocal correlation effects by means of vdW-DF approach. It is shown that the van der
Katsnelson, M. I.   +3 more
core   +2 more sources

The Halogen Effect on the Magnetic Behaviour of Dimethylformamide Solvates in [Fe(halide-salEen)2]BPh4

open access: yesMagnetochemistry, 2022
Complexes [Fe(X-salEen)2]BPh4·DMF, with X = Br (1), Cl (2), and F (3), were crystallised from N,N′-dimethylformamide with the aim of understanding the role of a high boiling point N,N′-dimethylformamide solvate in the spin crossover phenomenon.
Rafaela T. Marques   +11 more
doaj   +1 more source

Halogenation effects in Intramolecular Furan Diels-Alder reactions:broad scope synthetic and computational studies [PDF]

open access: yes, 2013
For the first time a comprehensive synthetic and computational study of the effect of halogen substitution on both furan and dienophile for the intramolecular Furan Diels-Alder (IMDAF) reaction has been undertaken.
Bebbington, Magnus William Paul   +3 more
core   +1 more source

Halogen⋯halogen contra C–H⋯halogen interactions

open access: yesCrystEngComm, 2014
Pressure affects the competition between C–H⋯X hydrogen bonds and X⋯X halogen⋯halogen interactions. In bromomethane, CH3Br, pressure changes the molecular arrangement of the two solid-state phases of this compound: low-pressure phase α is dominated by halogen⋯halogen interactions, whereas above 1.5 GPa the β phase is governed by C–H⋯halogen bonds.
Marcin Podsiadło   +2 more
openaire   +2 more sources

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