NDLI: Monomeric, trimeric, and tetrameric transition metal complexes (Mn, Fe, Co) containing N, N-bis(2-pyridylmethyl)-2-aminoethanol /-ate: preparation, crystal structure, molecular magnetism and oxidation catalysis

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Monomeric, trimeric, and tetrameric transition metal complexes (Mn, Fe, Co) containing N, N-bis(2-pyridylmethyl)-2-aminoethanol /-ate: preparation, crystal structure, molecular magnetism and oxidation catalysis

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kim, Bong Gon Rowthu, Sankara Rao Min, Kil Sik Kim, Cheal Hyun, Min Young Song, Young Joo Shin, Jong Won
Description	Author Affiliation: Shin JW ( Department of Chemistry Graduate School, Kyungpook National University, Daegu, 702-701, Republic of Korea.)
Abstract	The reaction of N,N– bis(2-pyridylmethyl)-2-aminoethanol (bpaeOH), $NaSCN/NaN_{3},$ and metal (M) ions [M = Mn(II), Fe(II/III), Co(II)] in MeOH , leads to the isolation of a series of monomeric, trimeric, and tetrameric metal complexes, namely $[Mn(bpaeOH)(NCS)_{2}]$ (1), $[Mn(bpaeO)(N_{3})_{2}]$ (2), $[Fe(bpaeOH)(NCS)_{2}]$ (3), $[Fe_{4}(bpaeO)_{2}(CH_{3}O)_{2}(N_{3})_{8}]$ (4), $[Co(bpaeOH)(NCS)_{2}]$ (5), and $[Co_{3}(bpaeO)_{2}(NO_{3})(N_{3})_{4}](NO_{3})$ (6). These compounds have been investigated by single crystal X-ray diffractometry and magnetochemistry. In complex 1 the Mn(II) is bonded to one bpaeOH and two thiocyanate ions, while in complex 2 it is coordinated to a deprotonated $bpaeO^{−}$ and two azide ions. The oxidation states of manganese ions are 2+ for 1 and 3+ for 2, respectively, indicating that the different oxidation states depend on the type of binding anions. The structures of monomeric iron(II) and cobalt(II) complexes 3 and 5 with two thiocyanate ions are isomorphous to that of 1. Compounds 1, 2, 3, and 5 exhibit high-spin states in the temperature range 5 to 300 K. 4 contains two different iron(III) ions in an asymmetric unit, one is coordinated to a deprotonated $bpaeO^{−},$ an azide ion, and a methoxy group , and the other is bonded to three azide ions and two oxygens from $bpaeO^{−}$ and a methoxy group . Two independent iron(III) ions in 4 form a tetranuclear complex by symmetry. 4 displays both ferromagnetic and antiferromagnetic couplings (J = 9.8 and −14.3 $cm^{−1})$ between the iron(III) ions. 6 is a mixed-valence trinuclear cobalt complex, which is formulated as $Co^{III}(S$ = $0)–Co^{II}(S$ = $3/2)–Co^{III}(S$ = 0). The effective magnetic moment at room temperature corresponds to the high-spin cobalt(II) ion (∼4.27 $μ_{B}).$ Interestingly, 6 showed efficient catalytic activities toward various olefins and alcohols with modest to excellent yields, and it has been proposed that a high-valent $Co^{V}–oxo$ species might be responsible for oxygen atom transfer in the olefin epoxidation and alcohol oxidation reactions.
ISSN	14779226
Issue Number	21
Volume Number	40
e-ISSN	13645447
Journal	Dalton Trans.
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2011-06-07
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Coordination Complexes Chemistry Ethanolamine Ethanolamines Magnetics Pyridines Transition Elements Catalysis Cobalt Chemical Synthesis Crystallography, X-Ray Iron Manganese Molecular Conformation Oxidation-Reduction Temperature Journal Article Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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Monomeric, trimeric, and tetrameric transition metal complexes (Mn, Fe, Co) containing N,N-bis(2-pyridylmethyl)-2-aminoethanol/-ate: preparation, crystal structure, molecular magnetism and oxidation catalysis.

Catalysis and molecular magnetism of dinuclear iron(III) complexes with N-(2-pyridylmethyl)-iminodiethanol/-ate

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Einkernige und oxoverbrückte zweikernige Fe(III)-Komplexe von N-Alkyl-N,N-bis(2-pyridylmethyl)aminen / Mononuclear and Oxo-Bridged Binuclear Fe(III) Complexes of N-Alkyl-N,N-bis(2-pyridylmethyl)amines

Diaqua-[N,N'-bis-(2-pyridylmethyl-ene)propane-1,3-diamine]manganese(II) dibromide-aqua-bromido[N,N'-bis-(2-pyridylmethyl-ene)propane-1,3-diamine]manganese(II) bromide-dibromido[N,N'-bis-(2-pyridylmethyl-ene)propane-1,3-diamine]manganese(II) (1/2/1).

A zigzag tetranuclear iron( III) complex, $[Fe_{4}(bpaeO)_{2}(CH_{3}O)_{2}(N_{3})_{8}]$ coexisting both ferromagnetic and antiferromagnetic couplings ( bpaeOH = N, N-bis(2-pyridylmethyl)-2-aminoethanol )

Synthesis, Structure and Characterisation of New Phenolato-Bridged Manganese Complexes [L2Mn2]2+ − Formation by Ligand Oxidation in LaH [LaH = N-(2-hydroxybenzyl)-N,N′-bis(2-pyridylmethyl)ethane-1,2-diamine]

Monomeric, trimeric, and tetrameric transition metal complexes (Mn, Fe, Co) containing N, N-bis(2-pyridylmethyl)-2-aminoethanol /-ate: preparation, crystal structure, molecular magnetism and oxidation catalysis

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Monomeric, trimeric, and tetrameric transition metal complexes (Mn, Fe, Co) containing N, N-bis(2-pyridylmethyl)-2-aminoethanol /-ate: preparation, crystal structure, molecular magnetism and oxidation catalysis