Results 81 to 90 of about 8,260 (218)
N─H or O─H Bond Activation With a Bicyclic Si4 Ring Compound
Chemistry – A European Journal, EarlyView.The bicyclic Si4 ring compound with zwitterionic character reacts with NH3, H2O, and selected alcohols to give functionalized saturated silicon rings, siliconoid clusters with unsubstituted Si atoms, or simple 1,3‐addition products. The experimentally observed reactivity could be rationalized based on results from mechanistic calculations employing ...
Michael Quest +7 more
wiley +1 more source
Heisenberg idempotents on unipotent groups [PDF]
Mathematical Research Letters, 2010 Let G be an algebraic group over an algebraically closed field of positive characteristic such that its neutral connected component is a unipotent group. We consider a certain class of closed idempotents in the braided monoidal category (under convolution of complexes) D_G(G) known as Heisenberg idempotents.
openaire +2 more sources
Barley Leaf Area and Leaf Growth Rates Are Maximized during the Pre-Anthesis Phase
Agronomy, 2015 Leaf developmental traits are an important component of crop breeding in small-grain cereals. Surprisingly, little is known about the genetic basis for the differences in barley (Hordeum vulgare L.) leaf development. The two barley row-type classes, i.e.
Ahmad M. Alqudah, Thorsten Schnurbusch
doaj +1 more source
Dioxygen Reduction at a Cu(I) Complex Supported by a Macrocyclic N3O Ligand System
Chemistry – A European Journal, EarlyView.A non‐reactive [CuI(14‐TMC)]+ complex is transformed to an efficient catalyst [CuI(14‐TMCO)]+ (TMCO = 4,8,12‐trimethyl‐1‐oxa‐4,8,12‐triazacyclotetradecane) for 4e−/4H+ reduction of O2 by N → O substitution. ABSTRACT CuI(14 TMCO) (1), involving a N3O‐macrocycle, reacts with O2 at cryogenic temperatures to yield an end‐on peroxodicopper(II) species.
Maximilian Schütze +3 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.A triangular double‐decker Ni6 complex self‐assembles from Ni(II), TMEDA, and a triphenylene tris dioxolene non‐innocent ligand, with two face‐to‐face tris‐semiquinone decks held by a strong covalent C─C interaction. This rigid scaffold delivers four reversible ligand‐centered redox events: oxidation switches on an intense near‐infrared band and ...
Aristide Colin +12 more
wiley +1 more source
A Momentum Map for the Heisenberg Group
SymmetryWe look at a momentum map associated with the Heisenberg group. We show that the cocycle associated with its momentum mapping is the value of a modulus of an associated coadjoint orbit.
openaire +2 more sources
Analysis on Extended Heisenberg Group [PDF]
Annales de la Faculté des sciences de Toulouse : Mathématiques, 2011 In this paper we study Markov semigroups generated by Hörmander-Dunkl type operators on Heisenberg group.
openaire +2 more sources
Chemistry – A European Journal, EarlyView.Understanding aromaticity has evolved from benzene‐centric concepts to a broad multidimensional framework spanning organic, inorganic, and excited‐state systems. This review highlights ambiguities between magnetic, electronic, geometric, and energetic descriptors, emphasizing the need for unified, multi‐criteria approaches.
Sílvia Escayola +2 more
wiley +1 more source
Compact Manifolds With Unbounded Nilpotent Fundamental Groups and Positive Ricci Curvature
Communications on Pure and Applied Mathematics, EarlyView.ABSTRACT It follows from the work of Kapovitch and Wilking that a closed manifold with nonnegative Ricci curvature has a uniformly almost nilpotent fundamental group. Leftover questions and conjectures, have asked if in this context the fundamental group is actually uniformly almost abelian. The main goal of this work is to construct examples (Mk9,gk)$(
Elia Bruè, Aaron Naber, Daniele Semola
wiley +1 more source
Non-local elliptic systems on the Heisenberg group
Electronic Journal of Differential Equations, 2016 We present Liouville type results for certain systems of nonlinear elliptic equations containing fractional powers of the Laplacian on the Heisenberg group.
Nasser Al-Salti, Sebti Kerbal
doaj