Über die Struktur der komplexen Perkuprate

Abstract

Direct Visualization of the Haemoglobin Molecules Indirect determinations of the shape and size of the haemoglobin molecules, careers of oxygen in blood, have been made by different authors~-~). I n the present work, the mole-The electron microscopic evidence t h u s greatly corroborates the very recent works of PERIJTZ et al.S).

Inner-sphere oxidation of a ternary dipicolinatochromium(III) complex involving a malonic acid co-ligand

“…This observation is attributed to a reaction between similarly charged species. Overall, this oxidation reaction can be assigned an innersphere mechanism, which is consistent with the reported behavior of IO 4 as a ligand binding to copper(III) [19] and nickel(IV) [20], such that coordinated H 2 O is substituted by IO 4 - [8][9][10][11][12]. Also, it may be concluded that from the reported equilibrium constants of aqueous IO 4 solutions …”

“…The value of K 3 indicates that H 3 IO 6 2is not the predominant species (IO 4 is used to represent H 4 IO 6 -) [19]. The Cr(III) will also be subject to an equilibrium in acid medium, as shown in Eq.…”

Kinetics and mechanism of periodate oxidation of two ternary nitrilotriacetatochromium(III) complexes involving histidine and aspartate co-ligands

“…The oxidation of [Cr III (HNTA)(Hist)-(H 2 O)] -by periodate probably involves an inner-sphere mechanism. This assignment is supported by the fact that [IO 4 ] -is capable of acting as a ligand, as demonstrated by its coordination to copper(III) [29] and nickel(IV) [30], in which coordinated H 2 O is substituted by I VII [13].…”

Inner-sphere Oxidation of a Ternary Complex Involving Iminodiacetatochromium(III) and DL-Aspartic acid by Periodate

“…From the above discussion, the following mechanism is proposed for the oxidation of [Cr III (HIDA)(Asp)(H 2 O) 2 ] + by periodate which supported by the observation that the ion is capable of acting as a ligand, as is apparent from its coordination to copper(III) [25] and nickel(IV) [26]. The oxidation of [Cr III (HIDA)(Asp)(H 2 O) 2 ] + by periodate may proceed via one or two electron transfer giving chromium(IV) or chromium(V), respectively in the rate determining step leading to chromium(VI).…”