Weak σ‐Hole Triel Bond between C5H5Tr (Tr=B, Al, Ga) and Haloethyne: Substituent and Cooperativity Effects

ChemPhysChem ◽  
2020 ◽  
Author(s):  
Qingqing Yang ◽  
Bohua Zhou ◽  
Qingzhong Li ◽  
Steve Scheiner
Keyword(s):  
Cooperativity Effects ◽  
Triel Bond

Conformational processes and cooperativity effects in chain molecules

1988 ◽  
Vol 151 (6) ◽  
pp. 531-536 ◽  
Author(s):  
Alberta Ferrarini ◽  
Giorgio Moro ◽  
Pier Luigi Nordio ◽  
Antonino Polimeno
Keyword(s):  
Chain Molecules ◽  
Cooperativity Effects

scholarly journals Homochirality Is Originated from Handedness of Helices

2020 ◽  
Author(s):  
Shubin Liu
Keyword(s):  
Amino Acids ◽  
Asymmetric Synthesis ◽  
Electrostatic Interactions ◽  
Alpha Helix ◽  
Root Cause ◽  
Macromolecular Assembly ◽  
Nucleotide Sugars ◽  
Cooperativity Effects ◽  
Natural Amino Acids ◽  
Origin Of Homochirality

Homochirality is a common feature of amino acids and carbohydrates, whose origin is still unknown. For example, 19 of 20 natural amino acids are L-chiral but deoxyribose sugars in DNA are always D-chiral. Meanwhile, right-handed helices are ubiquitous in nature. Are these two phenomena intrinsically correlated? Here, we propose that homochirality of amino acids and nucleotide sugars is originated from the handedness of helices. We show that right-handed 3<sub>10-</sub>helix and alpha-helix favor the L-chiral form for amino acids, but for deoxyribose sugars right-handed helices prefer the D-chiral form instead. Our analyses unveil that there exist strong cooperativity effects dominated by electrostatic interactions. This work not only resolves the mystery of homochirality by providing a unified explanation for the origin of homochirality in proteins and DNA using helical secondary structures as the root cause, but also ratifies the Principle of Chirality Hierarchy, where chirality of a higher hierarchy dictates that of lower ones. Possible applications of the present work to asymmetric synthesis and macromolecular assembly are discussed.

Cooperativity effects between regium-bonding and pnicogen-bonding interactions in ternary MF···PH3O···MF (M = Cu, Ag, Au): an ab initio study

2020 ◽  
Vol 118 (24) ◽  
pp. e1784478
Author(s):  
Zan Zhang ◽  
Tian Lu ◽  
Luyang Ding ◽  
Guanyu Wang ◽  
Zhaoxu Wang ◽  
...  
Keyword(s):  
Ab Initio ◽  
Ab Initio Study ◽  
Cooperativity Effects

Ligand-Binding Cooperativity Effects in Polymer–Protein Conjugation

2019 ◽  
Vol 20 (2) ◽  
pp. 1118-1131 ◽  
Author(s):  
Jörg Reichenwallner ◽  
Anja Thomas ◽  
Tobias Steinbach ◽  
Jana Eisermann ◽  
Christian E. H. Schmelzer ◽  
...  
Keyword(s):  
Ligand Binding ◽  
Protein Conjugation ◽  
Cooperativity Effects

Theoretical Study on Cooperativity Effects between Anion-π and Halogen-Bonding Interactions

ChemPhysChem ◽  
2011 ◽  
Vol 12 (15) ◽  
pp. 2742-2750 ◽  
Author(s):  
Carolina Estarellas ◽  
Antonio Frontera ◽  
David Quiñonero ◽  
Pere M. Deyà
Keyword(s):  
Theoretical Study ◽  
Halogen Bonding ◽  
Cooperativity Effects
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