Results 81 to 90 of about 6,573,124 (276)
ChemistryEurope, EarlyView.Reacting 1‐hydridosilatrane with triphenylcarbenium hexachloridoantimonate in acetonitrile solution and in the presence of 4‐dimethylaminopyridine combines the world of silatranes with the world of carbenes, giving an unprecedented carbene‐type antimony pentachloride complex. This finding offers a new playground for exciting new chemistry.
David Mroß +7 more
wiley +1 more source
New skew Laplacian energy of simple digraphs [PDF]
Transactions on Combinatorics, 2013 For a simple digraph $G$ of order $n$ with vertex set${v_1,v_2,ldots, v_n}$, let $d_i^+$ and $d_i^-$ denote theout-degree and in-degree of a vertex $v_i$ in $G$, respectively.
Qingqiong Cai, Xueliang Li, Jiangli Song
doaj
Journal of Applied Mathematics, 2012 Let Φ(G,λ)=det(λIn-L(G))=∑k=0n(-1)kck(G)λn-k be the characteristic polynomial of the Laplacian matrix of a graph G of order n. In this paper, we give four transforms on graphs that decrease all Laplacian coefficients ck(G) and investigate a conjecture A.
Xinying Pai, Sanyang Liu
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ChemistryEurope, EarlyView.With a little help… OH•••F intramolecular hydrogen bonding (HB) strongly reduces alcohol HB acidity, resulting in underestimation of predicted HB acidity based on the molecular Kenny electrostatic potential. In contrast, CF2H–OH intramolecular interaction causes a positive cooperative effect leading to HB acidity enhancement, as revealed by ...
Zhong Wang +8 more
wiley +1 more source
Generalized Willmore Energies, Q-Curvatures, Extrinsic Paneitz Operators, and Extrinsic Laplacian Powers [PDF]
, 2022 Blitz, Samuel +2 more
openalex +1 more source
White Phosphorus Activation with Cobalt–Zinc Complexes: Access to Phosphorus‐Rich Sandwich Compounds
ChemistryEurope, EarlyView.Heterometallic complexes showcasing Co–Zn interactions have been synthesized through straightforward salt metathesis methods. Their reaction with white phosphorus yields a dimeric sandwich complex containing bridging P2 units. A stepwise mechanism for its formation is proposed, supported by the isolation of intermediates.
Marco D. Fritz +3 more
wiley +1 more source
ChemistryEurope, EarlyView.Ligand‐to‐metal charge transfer photocatalysis and benzenethiol‐based hydrogen atom transfer catalysis are integrated to develop an iron‐promoted anti‐Markovnikov hydrochlorination of alkenes with hydrochloric acid. The results of experimental and theoretical analyses provide fundamental insights into reactivity control, paving the way for future ...
Subrata Mukherjee +3 more
wiley +1 more source
AIMS MathematicsBipolar fuzzy sets (BPFs) provide a suitable framework for knowledge representation if some data contains imprecise and ambiguous information. In this manuscript, the lower and upper bounds of the Seidel Laplacian energy of a bipolar fuzzy graph were ...
Sivaranjani Krishnaraj +3 more
doaj +1 more source
Bounds of Laplacian Energy of a Hypercube Graph
International journal of engineering and technology, 2018 Let Qn denote the n – dimensional hypercube with order 2n and size n2n-1. The Laplacian L is defined by L = D where D is the degree matrix and A is the adjacency matrix with zero diagonal entries. The Laplacian is a symmetric
K. Bibi +2 more
semanticscholar +1 more source
Chemistry – A European Journal, EarlyView.Fluorido difluoroamido complexes F'MNF2 of heavy alkaline earth metals (M = Ca, Sr, Ba) were prepared through the reactions of laser‐ablated metal atoms with NF3 and isolated under cryogenic conditions in neon and argon matrices. The species feature a F'−− and a side‐on coordinated η3‐NF2− ligand with the F'−M−N angle decreasing from calcium to barium.
Xiya Xia, Robert Medel, Sebastian Riedel
wiley +1 more source