Crystal structure of a seven-coordinate manganese(II) complex with tris(pyridin-2-ylmethyl)amine (TMPA)

Frey, Steven T.; Ramirez, Hillary A.; Kaur, Manpreet; Jasinski, Jerry P.

doi:10.1107/s2056989018009611

Cited by 2 publications

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“…To the best of our knowledge, structures of the manganese(II) compounds described herein have not been reported previously. We have previously reported the structure of a mononuclear copper(II) complex with DQMEA (Frey, Ramirez et al, 2018). In this structure, the DQMEA ligand is tetradentate with a tris configuration of the quinoline groups as observed in [1].…”

Section: Database Surveymentioning

confidence: 95%

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Geometrical variations of two manganese(II) complexes with closely related quinoline-based tripodal ligands

et al. 2021

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Structural analyses of the compounds di-μ-acetato-κ4 O:O′-bis{[2-methoxy-N,N-bis(quinolin-2-ylmethyl)ethanamine-κ4 N,N′,N′′,O]manganese(II)} bis(tetraphenylborate) dichloromethane 1.45-solvate, [Mn2(C23O2)2(C23H23N3O)2](C24H20B)·1.45CH2Cl2 or [Mn(DQMEA)(μ-OAc)2Mn(DQMEA)](BPh4)2·1.45CH2Cl2 or [1](BPh4)2·1.45CH2Cl2, and (acetato-κO)[2-hydroxy-N,N-bis(quinolin-2-ylmethyl)ethanamine-κ4 N,N′,N′′,O](methanol-κO)manganese(II) tetraphenylborate methanol monosolvate, [Mn(CH3COO)(C22H21N3O)(CH3OH)](C24H20B)·CH3OH or [Mn(DQEA)(OAc)(CH3OH)]BPh4·CH3OH or [2]BPh4·CH3OH, by single-crystal X-ray diffraction reveal distinct differences in the geometry of coordination of the tripodal DQEA and DQMEA ligands to MnII ions. In the asymmetric unit, compound [1](BPh4)2·(CH2Cl2)1.45 crystallizes as a dimer in which each manganese(II) center is coordinated by the central amine nitrogen, the nitrogen atom of each quinoline group, and the methoxy-oxygen of the tetradentate DQMEA ligand, and two bridging-acetate oxygen atoms. The symmetric MnII centers have a distorted, octahedral geometry in which the quinoline nitrogen atoms are trans to each other resulting in co-planarity of the quinoline rings. For each MnII center, a coordinated acetate oxygen participates in C—H...O hydrogen-bonding interactions with the two quinolyl moieties, further stabilizing the trans structure. Within the crystal, weak π–π stacking interactions and intermolecular cation–anion interactions stabilize the crystal packing. In the asymmetric unit, compound [2]BPh4·CH3OH crystallizes as a monomer in which the manganese(II) ion is coordinated to the central nitrogen, the nitrogen atom of each quinoline group, and the alcohol oxygen of the tetradentate DQEA ligand, an oxygen atom of OAc, and the oxygen atom of a methanol ligand. The geometry of the MnII center in [2]BPh4·CH3OH is also a distorted octahedron, but the quinoline nitrogen atoms are cis to each other in this structure. Hydrogen bonding between the acetate oxygen atoms and hydroxyl (O—H...O) and quinolyl (C—H...O and N—H...O) moieties of the DQEA ligand stabilize the complex in this cis configuration. Within the crystal, dimerization of complexes occurs by the formation of a pair of intermolecular O3—H3...O2 hydrogen bonds between the coordinated hydroxyl oxygen of the DQEA ligand of one complex and an acetate oxygen of another. Additional hydrogen-bonding and intermolecular cation–anion interactions contribute to the crystal packing.

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Section: Database Surveymentioning

confidence: 95%

“…We have recently begun to study Mn II compounds with tetradentate, tripodal ligands (Frey, Li et al, 2018;Frey, Ramirez et al, 2018). These ligands are readily synthesized to provide a variety of N and O donors and other groups that can potentially alter the structural and/or electronic properties of the Mn II center.…”

Section: Chemical Contextmentioning

confidence: 99%

Geometrical variations of two manganese(II) complexes with closely related quinoline-based tripodal ligands

et al. 2021

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Heteronuclear d–d and d–f Ru(ii)/M complexes [M = Gd(iii), Yb(iii), Nd(iii), Zn(ii) or Mn(ii)] of ligands combining phenanthroline and aminocarboxylate binding sites: combined relaxivity, cell imaging and photophysical studies

et al. 2019

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Crystal structure of a seven-coordinate manganese(II) complex with tris(pyridin-2-ylmethyl)amine (TMPA)

Abstract: The crystal structure of [Mn(TMPA)(Ac)(CH3OH)]BPh4 (TMPA = tris(pyridin-2-ylmethyl)amine, Ac = acetate, BPh4 = tetraphenylborate) has been determined. The structure reveals a seven-coordinate MnII center with distorted, pentagonal bipyramidal geometry.

Cited by 2 publications

References 26 publications

Geometrical variations of two manganese(II) complexes with closely related quinoline-based tripodal ligands

Geometrical variations of two manganese(II) complexes with closely related quinoline-based tripodal ligands

Heteronuclear d–d and d–f Ru(ii)/M complexes [M = Gd(iii), Yb(iii), Nd(iii), Zn(ii) or Mn(ii)] of ligands combining phenanthroline and aminocarboxylate binding sites: combined relaxivity, cell imaging and photophysical studies

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Crystal structure of a seven-coordinate manganese(II) complex with tris(pyridin-2-ylmethyl)amine (TMPA)

Abstract: The crystal structure of [Mn(TMPA)(Ac)(CH3OH)]BPh4 (TMPA = tris­(pyridin-2-yl­meth­yl)amine, Ac = acetate, BPh4 = tetra­phenyl­borate) has been determined. The structure reveals a seven-coordinate MnII center with distorted, penta­gonal bipyramidal geometry.

Cited by 2 publications

References 26 publications

Geometrical variations of two manganese(II) complexes with closely related quinoline-based tripodal ligands

Geometrical variations of two manganese(II) complexes with closely related quinoline-based tripodal ligands

Heteronuclear d–d and d–f Ru(ii)/M complexes [M = Gd(iii), Yb(iii), Nd(iii), Zn(ii) or Mn(ii)] of ligands combining phenanthroline and aminocarboxylate binding sites: combined relaxivity, cell imaging and photophysical studies

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Abstract: The crystal structure of [Mn(TMPA)(Ac)(CH3OH)]BPh4 (TMPA = tris(pyridin-2-ylmethyl)amine, Ac = acetate, BPh4 = tetraphenylborate) has been determined. The structure reveals a seven-coordinate MnII center with distorted, pentagonal bipyramidal geometry.