Mononuclear Manganese(III) Complexes as Building Blocks for the Design of Trinuclear Manganese Clusters: Study of the Ligand Influence on the Magnetic Properties of the [Mn<sub>3</sub>(μ<sub>3</sub>-O)]<sup>7+</sup> Core
Marta Viciano-Chumillas
Stefania Tanase
Ilpo Mutikainen
Urho Turpeinen
L. Jos de Jongh
Jan Reedijk
10.1021/ic8002492.s001
https://acs.figshare.com/articles/journal_contribution/Mononuclear_Manganese_III_Complexes_as_Building_Blocks_for_the_Design_of_Trinuclear_Manganese_Clusters_Study_of_the_Ligand_Influence_on_the_Magnetic_Properties_of_the_Mn_sub_3_sub_sub_3_sub_O_sup_7_sup_Core/2929441
The synthesis, crystal structure, and magnetic properties of three new manganese(III) clusters are reported, [Mn<sub>3</sub>(μ<sub>3</sub>-O)(phpzH)<sub>3</sub>(MeOH)<sub>3</sub>(OAc)] <b>(1)</b>, [Mn<sub>3</sub>(μ<sub>3</sub>-O)(phpzMe)<sub>3</sub>(MeOH)<sub>3</sub>(OAc)]·1.5MeOH <b>(2)</b>, and [Mn<sub>3</sub>(μ<sub>3</sub>-O)(phpzH)<sub>3</sub>(MeOH)<sub>4</sub>(N<sub>3</sub>)]·MeOH <b>(3)</b> (H<sub>2</sub>phpzH = 3(5)-(2-hydroxyphenyl)-pyrazole and H<sub>2</sub>phpzMe = 3(5)-(2-hydroxyphenyl)-5(3)-methylpyrazole). Complexes <b>1</b>−<b>3</b> consist of a triangle of manganese(III) ions with an oxido-center bridge and three ligands, phpzR<sup>2−</sup> (R = H, Me) that form a plane with the metal ions. All the complexes contain the same core with the general formula [Mn<sub>3</sub>(μ<sub>3</sub>-O)(phpzR)<sub>3</sub>]<sup>+</sup>. Methanol molecules and additional bridging ligands, that is, acetate (complexes <b>1</b> and <b>2</b>) and azide (complex <b>3</b>), are at the terminal positions. Temperature dependent magnetic susceptibility studies indicate the presence of predominant antiferromagnetic intramolecular interactions between manganese(III) ions in <b>1</b> and <b>3</b>, while both antiferromagnetic and ferromagnetic intramolecular interactions are operative in <b>2</b>.
2008-07-07 00:00:00
Trinuclear Manganese Clusters
ligand
metal ions
antiferromagnetic intramolecular interactions
hydroxyphenyl
H 2phpzMe
complexes 1
Mn
Complexe
susceptibility studies
intramolecular interactions
Building Blocks
Ligand Influence
Magnetic Properties
H 2phpzH
crystal structure
terminal positions
manganese