1989
DOI: 10.1002/9780470166383.ch4
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Molecular Mechanics Calculations as a Tool in Coordination Chemistry

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Cited by 96 publications
(19 citation statements)
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“…[54] The necessary creation of gauche interactions in the course of the complexation results in an open-chain tetramine that binds copper(II) ions a factor of 10 10 less strongly than does the corresponding macrocycle. This principle can be modeled relatively easily by force-field simulations.…”
Section: Induced Fit and Strain Effectsmentioning
confidence: 99%
See 1 more Smart Citation
“…[54] The necessary creation of gauche interactions in the course of the complexation results in an open-chain tetramine that binds copper(II) ions a factor of 10 10 less strongly than does the corresponding macrocycle. This principle can be modeled relatively easily by force-field simulations.…”
Section: Induced Fit and Strain Effectsmentioning
confidence: 99%
“…The explanation for this effect is the differing torsionalangle (Pitzer) strains in the resulting metallacyclohexanes or -pentanes, respectively. [54] The necessary creation of gauche interactions in the course of the complexation results in an open-chain tetramine that binds copper(II) ions a factor of 10 10 less strongly than does the corresponding macrocycle. [54a] In a complex of potassium ions with the crown compound [18]crown-5, only 1/6 fewer oxygen atoms are present as potential acceptor centers than in the complex with [18]crown-6, but the binding constant with [18]crown-6 is decreased by far more than 1/6.…”
Section: Induced Fit and Strain Effectsmentioning
confidence: 99%
“…-pentan. [54] Durch den bei der Komplexierung notwendigen Aufbau von gauche-Wechselwirkungen bindet ein offenkettiges Tetramin Kupfer(II)-Ionen um den Faktor 10 10 -mal schwächer als der entsprechende Makrocyclus. [54a] Im Komplex von Kaliumionen mit der Kronenverbindung [18]Krone-5 sind nur 1/6 weniger Sauerstoffatome als potenzielle Akzeptorzentren vorhanden als im Komplex mit [18]Krone-6, jedoch ist die Bindungskonstante mit [18]Krone-6 um weit mehr als 1/6 reduziert: Dies ist das Resultat einer sterischen Hinderung bei Ersatz eines O-Atoms durch eine CH 2 -Gruppe.…”
Section: Induzierte Passform Und Spannungseffekteunclassified
“…In order to increase the stability, preorganizing groups have been attached to the carbon backbone of EDTA and DTPA (Brechbiel et al 1986;Wu et al 1997, McMurry et al 1998. Preorganization obviously stabilizes the conformation of the free chelator in a manner which is comparable to the metal chelate (Hancock 1989). The reduction of the entropy, which in general works against the complexation of a metal, leads to faster complexation kinetics.…”
Section: Acyclic Bifunctional Chelatorsmentioning
confidence: 99%