Results 61 to 70 of about 1,811,886 (362)
Organic and biomolecular chemistry, 2016 New biaryl iminium salt catalysts for enantioselective alkene epoxidation containing additional substitution in the heterocyclic ring are reported. The effects upon conformation and enantioselectivity of this additional substitution, and the influence of
Philip C Bulman Page +6 more
semanticscholar +1 more source
Dihedral angles and orthogonal polyhedra
, 2013 Consider an orthogonal polyhedron, i.e., a polyhedron where (at least after a suitable rotation) all faces are perpendicular to a coordinate axis, and hence all edges are parallel to a coordinate axis. Clearly, any facial angle and any dihedral angle is a multiple of $ /2$. In this note we explore the converse: if the facial and/or dihedral angles are
Biedl, Therese +4 more
openaire +2 more sources
Advanced Functional Materials, EarlyView.This study presents a novel donor‐bridge‐acceptor‐bridge‐donor (D‐B‐A‐B‐D) molecular system, which shows near‐unity intramolecular excitation energy transfer (IET) from two identical energy donors to a coplanar acceptor. It enables a four‐level energy system for efficient lasing at the acceptor emission band in a microspherical cavity with a low lasing
Vishal Kumar +6 more
wiley +1 more source
6-Benzyl 4-ethyl 2-chloro-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine-4,6-dicarboxylate
Acta Crystallographica Section E, 2011 In the title compound, C18H18ClN3O4, the dihedral angle between the pyrimidine ring and the N-bonded ester grouping is 56.27 (7)° and the dihedral angle between the aromatic rings is 11.23 (7)°.
Huan-Mei Guo
doaj +1 more source
Advanced Functional Materials, EarlyView.The side‐chain configuration in the bay region of C‐shaped ortho‐benzodipyrrole‐based non‐fullerene acceptors plays a crucial role in their self‐assembly, single‐crystal structures, and optoelectronic properties. The closely correlated molecular structure and performance underscore the importance of minimizing A–A self‐aggregation and enhancing D–A ...
Yung‐Jing Xue +18 more
wiley +1 more source
3-(4-Bromophenyl)-1-butyl-5-[1-(2-chloro-6-methylphenyl)-1H-tetrazol-5-yl]imidazolidine-2,4-dione
Acta Crystallographica Section E, 2013 In the title molecule, C21H20BrClN6O2, the chloro-substituted benzene ring forms a dihedral angle of 77.84 (7)° with the tetrazole ring and the bromo-substituted ring forms a dihedral angle of 43.95 (6)° with the imidazole ring. The
Gabriel B. Hall +3 more
doaj +1 more source
Rigidity of infinite disk patterns
, 1998 Let P be a locally finite disk pattern on the complex plane C whose combinatorics are described by the one-skeleton G of a triangulation of the open topological disk and whose dihedral angles are equal to a function \Theta:E\to [0,\pi/2] on the set of ...
He, Zheng-Xu
core +2 more sources
Rugged Metropolis Sampling with Simultaneous Updating of Two Dynamical Variables [PDF]
, 2005 The Rugged Metropolis (RM) algorithm is a biased updating scheme, which aims at directly hitting the most likely configurations in a rugged free energy landscape. Details of the one-variable (RM$_1$) implementation of this algorithm are presented.
B. A. Berg +7 more
core +1 more source
Advanced Functional Materials, EarlyView.Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler +10 more
wiley +1 more source
2-(2-Chloro-3-quinolyl)-3-phenylthiazolidin-4-one
Acta Crystallographica Section E, 2009 In the title compound, C18H13ClN2OS, the thiazolidinone ring is slightly distorted and adopts a envelope conformation. The basal plane is nearly perpendicular to the quinoline ring, forming a dihedral angle of 86.1 (1)°, and makes a ...
Wei-Wei Liu +4 more
doaj +1 more source