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Nomenclatura Unesco > (23) Química > (2303) Química inorgánica > (2303.13) Halógenos

Mostrando recursos 1 - 20 de 526

1. Silyl-mediated halogen/halogen displacement in pyridines and other heterocycles - Cottet, Fabrice; Schlosser, Manfred
Heating with bromotrimethylsilane converts 2-chloropyridine into 2-bromopyridine and 2-chloro-6-methylpyridine into 2-bromo-6-methylpyridine.

2. Halogen bonds in biological molecules - Auffinger, Pascal; Hays, Franklin A.; Westhof, Eric; Ho, P. Shing
Short oxygen–halogen interactions have been known in organic chemistry since the 1950s and recently have been exploited in the design of supramolecular assemblies.

3. Halogen bonds in biological molecules - Auffinger, Pascal; Hays, Franklin A.; Westhof, Eric; Ho, P. Shing
Short oxygen–halogen interactions have been known in organic chemistry since the 1950s and recently have been exploited in the design of supramolecular assemblies.

4. Directing macromolecular conformation through halogen bonds - Voth, Andrea Regier; Hays, Franklin A.; Ho, P. Shing
The halogen bond, a noncovalent interaction involving polarizable chlorine, bromine, or iodine molecular substituents, is now being exploited to control the assembly of small molecules in the design of supramolecular complexes and new materials.

5. Theoretical Investigation of Halogen-Oxygen Bonding and Its Implications in Halogen Chemistry and Reactivity - Kosmas, Agnie Mylona
Trends in the properties of normal valent and multivalent halogen-oxygen bonding are examined for the isomers of the halogen polyoxide families of the types (YXO2) and (YXO3), Y = Cl, Br, I, H, CH3, X = Cl, Br, I.

6. Phase Separation of Halogen-Containing Sodium Borosilicate Glasses - UO, Motohiro; YAMASHIKA, Yujiro; MORITA, Kazuki; KARUBE, Isao; MAKISHIMA, Akio; ??, ??; ??, ???; ??, ??; ??, ??; ??, ??
The pore diameter increased and the specific surface area decreased with increasing temperature, time of heat treatment and halogen content.

7. Microdureza de resinas em função da cor e luz halógena - Martins,Fábio; Delbem,Alberto Carlos Botazzo; Santos,Luis Roque de Araújo dos; Soares,Hugo Leonardo de Oliveira; Martins,Eleonora de Oliveira Bandolin
O objetivo desse trabalho foi avaliar a influência da intensidade da luz e cor de uma resina composta no grau de dureza Knoop.

8. Eficacia de polimerización de una moderna lámpara halógena a través de cerámica - Reviejo Fragua, Marta
Las facetas de porcelana se han convertido en una popular modalidad de tratamiento.

9. Broken-Symmetry Ground States of Halogen-Bridged Binuclear Metal Complexes - Yamamoto, Shoji
Based on a symmetry argument, we study ground states of what we callMMX-chain compounds, which are the new class of halogen-bridged metalcomplexes.

10. Two-photon detachment of electrons from halogen negative ions - Gribakin, G. F.; Ivanov, V. K.; Korol, A. V.; Kuchiev, M. Yu.
The Dyson equation method is used to obtain the outer npground-state wave functions with proper asymptotic behavior exp (-k r),corresponding to correct (experimental) binding energies E=k^2/2.

11. The metabolism of halogen-substituted benzoic acids by Pseudomonas fluorescens - Hughes, D. E.
Washed suspensions of Pseudomonas fluorescens, grown with benzoate as sole carbon source, oxidize monohalogenobenzoates in the following descending order of effectiveness: benzoate, fluorobenzoates, chlorobenzoates, bromobenzoates, iodobenzoates.

12. The metabolism of halogen-substituted benzoic acids by Pseudomonas fluorescens - Hughes, D. E.
Washed suspensions of Pseudomonas fluorescens, grown with benzoate as sole carbon source, oxidize monohalogenobenzoates in the following descending order of effectiveness: benzoate, fluorobenzoates, chlorobenzoates, bromobenzoates, iodobenzoates.

13. Soliton excitations in halogen-bridged mixed-valence binuclear metal complexes - Yamamoto, Shoji; Ichioka, Masanori
Motivated by recent stimulative observations in halogen (X)-bridged binucleartransition-metal (M) complexes, which are referred to as MMX chains, we studysolitons in a one-dimensional three-quarter-filled charge-density-wave systemwith both intrasite and intersite electron-lattice couplings.

14. Alkali and Halogen Chemistry in Volcanic Gases on Io - Schaefer, Laura; Fegley Jr, Bruce
We use chemical equilibrium calculations to model the speciation of alkalisand halogens in volcanic gases emitted on Io.

15. Monomer conversion of composite dental resins photoactivated by a halogen lamp and a LED: a FT-Raman spectroscopy study - Soares,Luís Eduardo Silva; Rocha,Rick; Martin,Airton Abrahão; Pinheiro,Antonio L. B.; Zampieri,Marcelo
Eighteen circular blocks of resins cured either by a LED or a halogen lamp (20, 40 and 60 s), had their top (T) and bottom (B) surfaces studied using a FT-Raman spectrometer.

16. Effectiveness of composite resin polymerization using light-emitting diodes (LEDs) or halogen-based light-curing units - Micali,Bianca; Basting,Roberta Tarkany
The clinical performance of composite resins is greatly influenced by the quality of the light-curing unit used.

17. Characterization of halogen-bridged binuclear metal complexes as hybridized two-band materials - Yamamoto, Shoji
We study the electronic structure of halogen-bridged binuclear metal (MMX)complexes with a two-band Peierls-Hubbard model.

18. Contrast sensitivity and glare disability by halogen light after monofocal and multifocal lens implantation - Schmitz, S.; Dick, H; Krummenauer, F.; Schwenn, O.; Krist, R.
BACKGROUND—Standard examination of contrast sensitivity under conditions of glare disability is performed with incandescent light.

19. Soliton-induced optical absorption of halogen-bridged mixed-valence binuclear metal complexes - Ohara, Jun; Yamamoto, Shoji
Photoinduced soliton absorption spectra forMMX chains possibly split into two bands, forming a striking contrast to thosefor conventional mononuclear metal (MX) analogs, due to the brokenelectron-hole symmetry combined with relevant Coulomb and/or electron-phononinteractions.

20. Alkyl/halogen substitution in carbenes (carbenoids): a route to new cyclopropane derivatives - Le, Van Chau; Schlosser, Manfred
7-Halo-7-methylnorcaranes (I) and 7,7-dimethylnorcarane (II) are formed via replacement of halogen by Me during the reaction of cyclohexene (III) with carbenes (carbenoids) and MeLi.

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