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In chemistry, charge-transfer (CT) complex, or electron donor-acceptor complex, describes a type of supramolecular assembly of two or more molecules or ions. The assembly consists of two molecules that self-attract through electrostatic forces, i.e., one has at least partial negative charge and the partner has partial positive charge, referred ...
The optical spectrum of this d 6 octahedral complex exhibits an intense absorption near 250 nm corresponding to a transition from ligand σ MO to the empty e g MO. In IrBr 6 2−, which is a d 5 complex, two absorptions, one near 600 nm and another near 270 nm, are observed.
4.2 Ions in flame. 4.3 Gases. 4.3.1 Bead tests. ... Charge-transfer complexes tend to have very intense colors for different reasons. ... Iodine: I 2 dark purple ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 10 February 2025. This article is about the chemical element. For other uses, see Iodine (disambiguation). Chemical element with atomic number 53 (I) Iodine, 53 I Iodine Pronunciation / ˈ aɪ ə d aɪ n, - d ɪ n, - d iː n / (EYE -ə-dyne, -din, -deen) Appearance lustrous metallic gray solid ...
Most polyhalogen ions are intensely colored, with deepened color as the atomic weight of the constituent element increases. The well-known starch-iodine complex has a deep blue color due to the linear [I 5] − ions present in the amylose helix. [4] Some colors of the common species were listed below: [3]
The collisions between reagent ions and analyte molecules occur at close to thermal energies, so that the energy available to fragment the analyte ions is limited to the exothermicity of the ion-molecule reaction. For a proton transfer reaction, this is just the difference in proton affinity between the neutral reagent molecule and the neutral ...
Ionic conduction [ edit ] Similar to electron conduction, the electrical resistance of thin-film electrolytes depends on the applied electric field, such that when the thickness of the sample is reduced, the conductivity improves due to both the reduced thickness and the field-induced conductivity enhancement.
The abscissa is the transferred amount of charge Δe or the induced polarization P, the ordinate the Gibbs free energy. ΔG(0) ‡ = λ o /4 is the reorganization energy at Δe = 0.5, it corresponds to the activation energy of the self-exchange reaction. Of course, in this classical model the transfer of any arbitrary amount of charge Δe is ...