Manganese Coordination Compounds: Classification and Analysis of Crystallographic and Structural Data

Abstract

This review summarises over seven hundred ciystallographic structures of manganese coordination compounds. In most the manganese is six coordinated, but there are examples from two to eight coordinated. The nuclearity ranges from monomelic to polymeric, and a wide range of ligand systems are found, which parallels the rich chemistry of manganese. The structures are discussed in terms of the coordination about the metal atoms, and correlations are drawn between donor atom, bond length and inteibond angles. There are several examples of distortion isomerism and CONTENTS 0. Abbreviations

A new type of manganese-Schiff base complex, catalysts for the disproportionation of hydrogen peroxide as peroxidase mimics

“…The IR spectra were recorded as KBr discs on a Nicolet PC5 FT-IR spectrophotometer and UV-Visible spectra on a Hewlett-Packard 8452A instrument. 1 H NMR spectra were recorded on a Bruker WH 300 MHz spectrometer using CDCl 3 as solvent and SiMe 4 as an internal reference. FAB mass spectra were recorded on a Kratos MS50 TC spectrometer connected to a DS90 data system, using metanitrobenzyl alcohol as a matrix.…”

“…In recent years the coordination chemistry of manganese has been intensively studied [1][2][3] due to its occurrence in the active sites of several enzymes that participate in the chemistry of reactive oxygen species, such as Mn catalase, 4 Mn superoxidase dismutase, 5 Mn ribonucleotide reductase, 6 the oxygenevolving complex (OEC), 7,8 or, in particular, the Mn peroxidase that protects cells against hydrogen peroxide induced oxidative stress. 9 Oxidative stress is implicated in the pathogenesis of neurodegenerative disorders and brain ischemia, and hydrogen peroxide plays a central role in this stress.…”

Development of Extractive Spectrophotometric Determination of Manganese (II) Using [N - (O-Methoxy Benzaldehyde)-2-Aminophenol] (NOMBAP) as an Analytical Reagent

“…(De et al, 1970) Schiff bases play crucial role as chelating agents in complexes of transition metal (Hayashi et al, 2002;Temel & Hosgoren, 2002). Various reagents (Chang et al,2019;Feig, 1949;Gili et al, 1997;Husaain et al,2019;Holloway & Melnik ,1996;Nath et al, 1974;Scott, 1939;;Sayed et al, 2010;Shaheen et al, 2019;Vinusha et al,2019) are available for the spectrophotometric determination of Manganese (II).…”

Seven-coordinate Mn2+ ions in [Mn(15-crown-5)(H2O)2]2+ as luminescent probes for dynamic supramolecular events†

“…2(a)] and the previously reported 8 absorption spectrum of species [MnBr(Me 6 tren)] + reveals major variations in emission and excitation/absorption spectral profiles for Mn 2+ ions in coordination numbers 7, 8, 4, 6 and 5 respectively. Luminescence techniques may thus be informative in probing such common Mn 2+ coordination sites 9 in a wide range of materials including phosphors, 3 polymers, 10 industrial minerals, 11 biomolecules and potential MRI contrast agents for which the behaviour of the Mn-OH 2 linkage is crucial. 12 To establish whether the decay rates of Mn 2+ [ 4 T 1 ( 4 G)?…”