Late first-row transition metal complexes of a 17-membered piperazine-based macrocyclic ligand: structures and magnetism

2020 ◽  
Vol 49 (26) ◽  
pp. 9057-9069
Author(s):  
Eva Zahradníková ◽  
Radovan Herchel ◽  
Ivan Šalitroš ◽  
Ivana Císařová ◽  
Bohuslav Drahoš
Keyword(s):  
Transition Metal ◽  
Magnetic Anisotropy ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Macrocyclic Ligand ◽  
Coordination Numbers

Three different coordination numbers and moderate/large magnetic anisotropy were observed in transition metal complexes of a 17-membered piperazine-based macrocyclic ligand.

Measuring giant anisotropy in paramagnetic transition metal complexes with relevance to single-ion magnetism

2016 ◽  
Vol 45 (42) ◽  
pp. 16751-16763 ◽  
Author(s):  
J. Krzystek ◽  
Joshua Telser
Keyword(s):  
Transition Metal ◽  
Magnetic Anisotropy ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Coordination Complexes ◽  
Multiple Methods

“Giant magnetic anisotropy” is a phenomenon identified in certain coordination complexes of nd- and nf-block ions. The strengths and weaknesses of multiple methods used to measure it are evaluated.

scholarly journals Derivatized Pentadentate Macrocyclic Ligands and Their Transition Metal Complexes

2002 ◽  
Vol 7 (2) ◽  
pp. 241
Author(s):  
Muhammad S. Khan ◽  
Nawal K. Al-Rasbi ◽  
Edwin C. Constable ◽  
Adrian R. Dale ◽  
Jack Lewis
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
General Formula ◽  
Transition Metal Complexes ◽  
Thionyl Chloride ◽  
Macrocyclic Ligand ◽  
Macrocyclic Ligands ◽  
Esterification Reactions ◽  
Hydroxyethyl Group

The reaction of the pendant hydroxyethyl group in the planar pentadentate macrocyclic ligand,1,11-bis(2’-hydroxyethyl)-4,8;12,16;17,21-trinitrilo-1,2,10,11-tetraazacyclohenicosa- 2,4,6,9,12,14,18,20-octaene (L2), derived from the condensation of 2,6-pyridinedialdehyde with 6,6’-bis(2’ hydroxyethylhydrazino) -2,2’-bipyridine (L1), has been investigated. Esterification reactions are facile, and the reaction of the hydroxyethyl-substituted macrocycle with thionyl chloride yields a chloroethyl derivative. Metal complexes of the new derivatized macrocyclic ligands L3-6having general formula ML3-6X2.nH2O (M = Mn, Fe, Co, Ni, Cu, Zn) are readily prepared. 

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