The Lewis electron-pair bonding model: the physical background, one century later

2019 ◽  
Vol 3 (1) ◽  
pp. 35-47 ◽  
Author(s):  
Lili Zhao ◽  
W. H. Eugen Schwarz ◽  
Gernot Frenking
Keyword(s):  
Electron Pair ◽  
Pair Bonding ◽  
Physical Background

scholarly journals Electron-pair bonding in real space. Is the charge-shift family supported?

2019 ◽  
Vol 55 (35) ◽  
pp. 5071-5074 ◽  
Author(s):  
J. Luis Casals-Sainz ◽  
F. Jiménez-Grávalos ◽  
E. Francisco ◽  
A. Martín Pendás
Keyword(s):  
Electron Pair ◽  
Real Space ◽  
Pair Bonding ◽  
Shift Family ◽  
Charge Shift

Charge-shift bonding (CSB) has been introduced as a distinct third family of electron-pair links that adds to the covalent and ionic tradition.

ChemInform Abstract: Central Bond in the Three CN× Dimers NC-CN, CN-CN, and CN-NC: Electron Pair Bonding and Pauli Repulsion Effects.

ChemInform ◽  
2010 ◽  
Vol 23 (38) ◽  
pp. no-no
Author(s):  
F. M. BICKELHAUPT ◽  
N. M. M. NIBBERING ◽  
E. M. VAN WEZENBEEK ◽  
E. J. BAERENDS
Keyword(s):  
Electron Pair ◽  
Pair Bonding ◽  
Central Bond ◽  
Pauli Repulsion

Charge-Shift Bonding Emerges as a Distinct Electron-Pair Bonding Family from Both Valence Bond and Molecular Orbital Theories

2014 ◽  
Vol 10 (6) ◽  
pp. 2410-2418 ◽  
Author(s):  
Huaiyu Zhang ◽  
David Danovich ◽  
Wei Wu ◽  
Benoît Braïda ◽  
Philippe C. Hiberty ◽  
...  
Keyword(s):  
Molecular Orbital ◽  
Electron Pair ◽  
Valence Bond ◽  
Pair Bonding ◽  
Charge Shift

Central bond in the three CN.cntdot.dimers NC-CN, CN-CN and CN-NC: electron pair bonding and Pauli repulsion effects

1992 ◽  
Vol 96 (12) ◽  
pp. 4864-4873 ◽  
Author(s):  
F. Matthias Bickelhaupt ◽  
Nico M. M. Nibbering ◽  
Egbert M. Van Wezenbeek ◽  
Evert Jan Baerends
Keyword(s):  
Electron Pair ◽  
Pair Bonding ◽  
Central Bond ◽  
Pauli Repulsion

scholarly journals New Landscape of Electron-Pair Bonding: Covalent, Ionic, and Charge-Shift Bonds

2015 ◽  
pp. 169-211 ◽  
Author(s):  
Sason Shaik ◽  
David Danovich ◽  
Benoit Braida ◽  
Wei Wu ◽  
Philippe C. Hiberty
Keyword(s):  
Electron Pair ◽  
Pair Bonding ◽  
Charge Shift

The Lewis electron-pair bonding model: modern energy decomposition analysis

2019 ◽  
Vol 3 (1) ◽  
pp. 48-63 ◽  
Author(s):  
Lili Zhao ◽  
Markus Hermann ◽  
W. H. Eugen Schwarz ◽  
Gernot Frenking
Keyword(s):  
Electron Pair ◽  
Decomposition Analysis ◽  
Energy Decomposition Analysis ◽  
Pair Bonding ◽  
Energy Decomposition

1H and 13C NMR spectra of 2,2’-disubstitutedtrans-azobenzenes suitable for preparation of metallized azo dyes

1991 ◽  
Vol 56 (10) ◽  
pp. 2160-2168 ◽  
Author(s):  
Josef Jirman
Keyword(s):  
Nmr Spectra ◽  
Electron Pair ◽  
Phenyl Group ◽  
Aprotic Solvents ◽  
1H And 13C Nmr ◽  
Predominant Form ◽  
Rapid Equilibrium ◽  
Dipolar Aprotic Solvents ◽  
Free Electron Pair ◽  
C Nmr

The 1H and 13C NMR spectra have been measured of six trans-azobenzenes substituted at 2 and 2’ positions with substituents favourable for complex formation with a metal (OH, NH2, NHCOCH3, COOH). From the standpoint of NMR such substituted trans-azobenzenes are present in solution in a rapid equilibrium following from rotation around the bond between C-1 of phenyl group and N atom of azo linkage. The predominant form has the substituent in the syn-position with respect to the free electron pair of the nearer azo nitrogen atom. The equilibrium is affected by dipolar aprotic solvents (such as hexadeuteriodimethyl sulfoxide) by decreasing the presence of the predominant form by 1 to 11%.

Formation of laser-induced periodic surface structures on different materials: fundamentals, properties and applications

2020 ◽  
Vol 9 (1-2) ◽  
pp. 11-39 ◽  
Author(s):  
Stephan Gräf
Keyword(s):  
Friction And Wear ◽  
Review Paper ◽  
Laser Wavelength ◽  
Single Step ◽  
Surface Structures ◽  
Direct Writing ◽  
Periodic Surface ◽  
Experimental Approaches ◽  
Ordered Nanostructures ◽  
Physical Background

AbstractThe use of ultra-short pulsed lasers enables the fabrication of laser-induced periodic surface structures (LIPSS) on various materials following a single-step, direct-writing technique. These specific, well-ordered nanostructures with periodicities in the order of the utilised laser wavelength facilitate the engineering of surfaces with functional properties. This review paper discusses the physical background of LIPSS formation on substrates with different material properties. Using the examples of structural colours, specific wetting states and the reduction of friction and wear, this work presents experimental approaches that allow to deliberately influence the LIPSS formation process and thus tailor the surface properties. Finally, the review concludes with some future developments and perspectives related to forthcoming applications of LIPSS-based surfaces are discussed.

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