Publication

The reaction volume for the equilibrium between the lanthanide(III) ennea- and octaaqua ions as a diagnostic aid for their water-exchange mechanisms

André Merbach, Gabor Laurenczy
1988
Journal Articles

Abstract

The equilibrium between [Ce(H2O)9]3+ and [Ce(H2O)8]3+ has been followed in aqueous solution at 298 K by variable‐pressure UV spectroscopy at 295 nm. The dervied volume of reaction for the dissociation of this enneaaqua ion is ΔV 0 = +10.9 cm3. mol−1. This value, together with the previously determined activation volume, ΔV ≠ = −6 cm3. mol−1, for H2O exchange on [Ln(H2O)8]3+ (Ln = Tb to Tm), allows the assignment of an associative interchange I a mechanism on these octaaqua ions.

Official source

https://infoscience.epfl.ch/entities/publication/6c123e96-4a93-416d-9162-4d9ba7687880

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

André Merbach, Gabor Laurenczy
1988
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6c123e96-4a93-416d-9162-4d9ba7687880

About this result

Related concepts (24)

Reaction rate

The reaction rate or rate of reaction is the speed at which a chemical reaction takes place, defined as proportional to the increase in the concentration of a product per unit time and to the decrease in the concentration of a reactant per unit time. Reaction rates can vary dramatically. For example, the oxidative rusting of iron under Earth's atmosphere is a slow reaction that can take many years, but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second.

Associative substitution

Associative substitution describes a pathway by which compounds interchange ligands. The terminology is typically applied to organometallic and coordination complexes, but resembles the Sn2 mechanism in organic chemistry. The opposite pathway is dissociative substitution, being analogous to the Sn1 pathway. Intermediate pathways exist between the pure associative and pure dissociative pathways, these are called interchange mechanisms.

Reaction mechanism

In chemistry, a reaction mechanism is the step by step sequence of elementary reactions by which overall chemical reaction occurs. A chemical mechanism is a theoretical conjecture that tries to describe in detail what takes place at each stage of an overall chemical reaction. The detailed steps of a reaction are not observable in most cases. The conjectured mechanism is chosen because it is thermodynamically feasible and has experimental support in isolated intermediates (see next section) or other quantitative and qualitative characteristics of the reaction.

Related publications (10)

The reaction volume for the equilibrium between the lanthanide(III) ennea- and octaaqua ions as a diagnostic aid for their water-exchange mechanisms

Chat with Graph Search

Automated Reaction Exploration of Ozonation Processes for Model Olefins in Water

Structured catalytic wall microreactor for efficient performance of exothermic reactions

Rhodium-sulfonated diphosphine catalysts in aqueous hydroformylation of vinyl arenes: high-pressure NMR and IR studies