Die Wasserstoffbrücke im Festkörper

Steiner, Thomas

doi:10.1002/1521-3757(20020104)114:1<50::aid-ange50>3.0.co;2-h

Cited by 725 publications

(250 citation statements)

References 212 publications

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“…The structural and dynamical nature of this interaction seems to be the key to understanding long-range proton transport in these environments. Strong hydrogen bonding is frequently considered to be a precursor of proton-transfer reactions; 129 however, long-range proton transport also requires rapid bond breaking and forming processes, which is only expected to occur in weakly hydrogen bonded systems. Dynamical bond-length variations have long been recognized to be integral for the hydrogen bonding in proton-conducting systems; 130 however, it is only recently that the appearance of such "dynamical hydrogen bonding" has been explained through a consideration of the chemical interactions of the systems (including hydrogen bonding) in a wide range of configuration space.…”

Section: Proton Conduction Mechanismsmentioning

confidence: 99%

Transport in Proton Conductors for Fuel‐Cell Applications: Simulations, Elementary Reactions, and Phenomenology

Kreuer¹,

Paddison²,

Spohr³

et al. 2004

ChemInform

126

193

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Section: Proton Conduction Mechanismsmentioning

confidence: 99%

Transport in Proton Conductors for Fuel‐Cell Applications: Simulations, Elementary Reactions, and Phenomenology

Kreuer¹,

Paddison²,

Spohr³

et al. 2004

ChemInform

126

193

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“…Instead, he proposes a rule of thumb according to which the hydrogen bond length should not exceed 3.0 or 3.2 Å with an angle X-H···Y of at least > 90°. [130] The distances between C1 and Br2 and C6 and Br1 in In the group of Strassner, an alternative method for the synthesis of ethylene-linked bistriazolium salts was developed in 2010. [131] In their procedures, which were only published in a PhD thesis after the work described in sections 4.…”

mentioning

confidence: 99%

Highly Active Dinuclear Copper Catalysts for Homogeneous Azide–Alkyne Cycloadditions

et al. 2012

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It is better to light a candle than to curse the dark. AbstractThe copper-catalyzed azide-alkyne cycloaddition for the synthesis of 1,4-disubstituted 1,2,3-triazoles (CuAAC) is a variant of Huisgen's 1,3-dipolar cycloaddition which disburdens the thermal reaction from its major drawbacks such as poor regioselectivity, long reaction times and harsh conditions. In contrast to the widely used "black box" reagent mixtures, a molecularly defined, highly active catalyst system for homogeneous CuAAC reactions has been developed in this PhD project. In dependence on the postulated stepwise mechanism, its most important structural feature is the presence of two copper(I) ions irreversibly bound in the same catalyst molecule.A highly modular and profitable synthesis for bistriazolium hexafluorophosphate salts as precursors for the ancillary ligand system was devised. In analogy to the CuAAC catalyst systems of general formula [(NHC) 2 Cu]PF 6 described in literature, novel dinuclear copper(I) complexes with a bistriazolylidene ligand backbone and 1,3-bis(2,6-diisopropylphenyl)-imidazol-2-ylidene (IPr) as sacrificial ligand were prepared.However, these complexes did not show the expected high catalytic activity, most probably due to the strong coordination of the IPr ligands. In consequence, another family of dinuclear copper(I) complexes with m-coordinated acetate as labile ligand was synthesized by reaction of the bistriazolium hexafluorophosphate ligand precursors with copper(I) acetate in the presence of a base.The broad applicability and high catalytic activity of one of these bistriazolylidene dicopper acetate complexes was confirmed by a series of gaschromatographically mo-

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“…However, in the present age of weak interactions, hydrogen bonding involving intrinsically less polar bonds such as CÀH and heavier acceptor atoms such as Cl has become more widely discussed. [16] In particular, CÀH hydrogen bonding is favored as C À H bonds become acidic (e.g. in alkynes) [17] and when Cl is negatively charged.…”

mentioning

confidence: 99%

Evidence for CH Hydrogen Bonding in Salts of tert‐Butyl Cation

et al. 2012

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Einfluss aus der Nachbarschaft: Eine Kombination aus CH⋅⋅⋅Anion‐Wasserstoffbrücken und hyperkonjugativer Ladungsdelokalisierung erklärt, warum die IR‐Spektren des tert‐Butyl‐Kations sich mit dem vorhandenen Anion verändern (siehe die hochauflösende Röntgenstruktur). Zwischen νCH für das Kation und der Basizität des Carboran‐Anions gemäß der νNH‐Skala besteht ein linearer Zusammenhang.

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Die Wasserstoffbrücke im Festkörper

Cited by 725 publications

References 212 publications

Transport in Proton Conductors for Fuel‐Cell Applications: Simulations, Elementary Reactions, and Phenomenology

Transport in Proton Conductors for Fuel‐Cell Applications: Simulations, Elementary Reactions, and Phenomenology

Highly Active Dinuclear Copper Catalysts for Homogeneous Azide–Alkyne Cycloadditions

Evidence for CH Hydrogen Bonding in Salts of tert‐Butyl Cation

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