Results 51 to 60 of about 1,563,307 (153)

Ring opening of 2-aza-3-borabicyclo[2.2.0]hex-5-ene, the Dewar form of 1,2-dihydro-1,2-azaborine: stepwise versus concerted mechanisms

Beilstein Journal of Organic Chemistry, 2013
The ring opening of the Dewar form of 1,2-dihydro-1,2-azaborine, 2-aza-3-borabicyclo[2.2.0]hex-5-ene (3) is investigated by theoretical methods by using multiconfiguration SCF (CASSCF) and coupled cluster theory [CCSD(T)] with basis sets up to polarised ...
Holger F. Bettinger, Otto Hauler
doaj   +1 more source

Crystal structure, Hirshfeld surface analysis and DFT study of (2Z)-2-(2,4-dichlorobenzylidene)-4-[2-(2-oxo-1,3-oxazolidin-3-yl)ethyl]-3,4-dihydro-2H-1,4-benzothiazin-3-one

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compound, C20H16Cl2N2O3S, is built up from a dihydrobenzothiazine moiety linked by –CH– and –C2H4– units to 2,4-dichlorophenyl and 2-oxo-1,3-oxazolidine substituents, where the oxazole ring and the heterocyclic portion of the ...
Brahim Hni, Nada Kheira Sebbar, Tuncer Hökelek, Lhoussaine El Ghayati, Younes Bouzian, Joel T. Mague, El Mokhtar Essassi   +6 more
doaj   +1 more source

On partial augmentations of elements in integral group rings [PDF]

arXiv, 2021
Inner relations are derived between partial augmentations of certain elements (units or idempotents) in group rings.
arxiv  

Calculated optical properties of donor molecules based on benzo[1,2-b:4,5-b′]dithiophene and its derivatives

AIP Advances, 2021
In this work, we study the light absorption properties of different novel molecules based on benzo[1,2-b:4,5-b′]dithiophene (BDT), namely, BT-2F, BTRCl, and BTTzR, which hold great promise as electron-donor materials in organic solar cells.
Giuseppe M. Paternò, Andrea Farina, Francesco Scotognella   +2 more
doaj   +1 more source

Crystal structure and optical properties of fused-ring chalcone (E)-3-(anthracen-9-yl)-1-(4-nitrophenyl)prop-2-en-1-one

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compound, C23H15NO3, adopts an s-cis conformation with respect to the ethylene C=C and carbonyl C=O double bonds in the enone unit. The molecule is significantly twisted with a dihedral angle of 48.63 (14)° between the anthracene ring system ...
Muhamad Fikri Zaini, Ibrahim Abdul Razak, Wan Mohd Khairul, Suhana Arshad   +3 more
doaj   +1 more source

Ultracompact two‐way and four‐way SIW/HMSIW power dividers loaded by complementary split‐ring resonators

International journal of RF and microwave computer-aided engineering, 2019
In this paper, two ultracompact power dividers based on the substrate integrated waveguide (SIW) and half‐mode SIW (HMSIW) technologies loaded by complementary split‐ring resonators (CSRRs) are presented.
Ali‐Reza Moznebi, M. Danaeian, E. Zarezadeh, K. Afrooz   +3 more
semanticscholar   +1 more source

Lifting defects for nonstable K_0-theory of exchange rings and C*-algebras

, 2011
The assignment (nonstable K_0-theory), that to a ring R associates the monoid V(R) of Murray-von Neumann equivalence classes of idempotent infinite matrices with only finitely nonzero entries over R, extends naturally to a functor. We prove the following
B Blackadar, EG Effros, F Wehrung, F Wehrung, Friedrich Wehrung, GA Elliott, GJ Murphy, GM Bergman, GM Bergman, H Dobbertin, H Su, H-P Yu, I Kaplansky, J Tůma, KR Goodearl, KR Goodearl, KR Goodearl, KR Goodearl, LG Brown, M Rørdam, MA Rieffel, N Jacobson, P Ara, P Ara, P Gillibert, P Gillibert, PA Grillet, RB Warfield Jr, WK Nicholson   +28 more
core   +3 more sources

Mini-Workshop: Arithmetik von Gruppenringen [PDF]

, 2007
The theory of group rings has many connections to other mathematical areas, such as number theory, K-theory, topology, representation theory, homological algebra and of course the theory of finite and infinite groups, and ring theory.

core   +2 more sources

Quadratic form theory over preordered von Neumann-regular rings [PDF]

, 2008
To each pair, 〈R,T〉, consisting of a unitary commutative von Neumann-regular ring, R, where 2 is a unit and T is a preorder on R, we associate a reduced special group, GT(R), which faithfully reflects quadratic form theory, modulo T, over free R-modules ...
Dickmann, M., Miraglia, F.
core   +1 more source

Dual-Band Diffusive Metasurface-Based Reflector With Low Out-of-Band Backscattering

IEEE Access, 2020
This article describes a dual-band diffusive metasurface-based reflector, with a specular reflection band together with two sidebands which exhibit low radar cross-section (RCS).
Qihao Lv, Yue Tang, Binchao Zhang, Liyuan Yin, Cheng Jin, Raj Mittra   +5 more
doaj   +1 more source