Results 311 to 320 of about 2,408,601 (354)
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Hydrogen-bonding organocatalysts for ring-opening polymerization
, 2014In the ring-opening polymerization (ROP) of cyclic esters and carbonates, hydrogen-bonding organocatalysis offers an interesting alternative to metal-based and enzymatic catalysis to access biocompatible and biodegradable polymers.
Coralie Thomas, B. Bibal
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Persistent Hydrogen‐Bonded and Non‐Hydrogen‐Bonded Phenoxyl Radicals
Chemistry – A European Journal, 2011AbstractThe production of stable phenoxyl radicals is undoubtedly a synthetic chemical challenge. Yet it is a useful way to gain information on the properties of the biological tyrosyl radicals. Recently, several persistent phenoxyl radicals have been reported, but only limited synthetic variations could be achieved.
Maxim L. Kuznetsov +5 more
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Understanding the pK(a) of redox cysteines: the key role of hydrogen bonding.
Antioxidants and Redox Signaling, 2013Many cellular functions involve cysteine chemistry via thiol-disulfide exchange pathways. The nucleophilic cysteines of the enzymes involved are activated as thiolate. A thiolate is much more reactive than a neutral thiol.
Goedele Roos, N. Foloppe, J. Messens
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ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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Crystallography Reviews, 1995
This article focusses on the crystallographic research aimed at a better understanding of hydrogen bonds which has been published since January 1990. In the interest of continuity, earlier work is quoted when it relates to that published during this period.
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This article focusses on the crystallographic research aimed at a better understanding of hydrogen bonds which has been published since January 1990. In the interest of continuity, earlier work is quoted when it relates to that published during this period.
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Bonding of Hydrogen in Hydrogen Montmorillonite
Nature, 1964RESEARCH concerning bonding conditions for tritium and deuterium in micaceous minerals, as formerly mentioned by us1, indicated the presence of apical OH in di-octahedral hydro micas. Burns and White2 conclude from infra-red examination after hydrogen saturation and heating of LiNO3-treated muscovite that hydronium ions H3O+ replace interlayer cations,
Per Jørgensen, I. Th. Rosenqvist
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Hydrogen‐Bond Lengths in Polypeptide Helices: No Evidence for Short Hydrogen Bonds
Angewandte Chemie International Edition, 2004The $3_1_0$ helix and \alpha helix are closely related secondary structures observed in polypeptides. The $3_1_0$ helix is characterized by successive $4\rightarrow1$ $(C_1_0)$ hydrogen bonds ($C_1_0$= 10 atom hydrogen-bonding ring) of the type $C=O_i\cdot\cdot\cdot$ $HN_{i+3},$ while the $\alpha$ helix displays a hydrogen bond of the type $ C= O_i ...
Aravinda, Subrayashastry +3 more
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Dalton Transactions, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
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AbstractFor Abstract see ChemInform Abstract in Full Text.
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ChemInform Abstract: HYDROGEN HALIDES AND HYDROGEN BONDS
Chemischer Informationsdienst, 1977AbstractAnhand der verfügbaren Literaturdaten wird die Frage diskutiert, ob die Halogenwasserstoffe in wäßrigen Lösungen über H‐Bindungen an das Wasser gebunden sind.
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Hydrogen bonding: the role of hydrogen delocalization in the AHB bond
The Journal of Physical Chemistry, 1993The behavior of the A-H...B multiple minimum hydrogen bond can be understood in terms of an analysis similar to the molecular orbital method in molecular electronic quantum theory. Delocalization of hydrogen about two or more wells is described in terms of a linear combination of Gaussian orbitals, each referred to a well minimum.
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