Tetranuclear manganese(II) complexes of hydrazone and carbohydrazone ligands: Synthesis, crystal structures, magnetic properties, Hirshfeld surface analysis and DFT calculations

Abedi, Marjan; Yeşılel, Okan Zafer; Mahmoudi, Ghodrat; Bauzá, Antonio; Lofland, S. E.; Yerli, Yusuf; Kaminsky, Werner; Garczarek, Piotr; Zarȩba, Jan K.; Ienco, Andrea; Gargari, Masoumeh Servati

doi:10.1016/j.ica.2015.12.012

Cited by 26 publications

(14 citation statements)

References 47 publications

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“…The deprotonated ligand (L − ) has two potentially bridging functional groups (µ-O, µ-N-N) and, because of the free rotation around the N-N single bond, can exist in two different coordination conformers, both of which can in principle form spin-coupled dinuclear and polynuclear metal complexes with quite different magnetic properties. We decided to work with this ligand because its published coordination chemistry has been limited [14][15][16][17][18][19][20][21]. Since no Co(II) and Ni(II) complexes of L − have been reported, we first targeted compounds with these metal ions.…”

Section: Introductionmentioning

confidence: 99%

Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-Pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters

et al. 2019

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Syntheses, crystal structures and characterization are reported for four new complexes [Cu4Br2(L)4]Br2 (1), [Ni4(NO3)2(L)4(H2O)](NO3)2 (2), [Co2(L)3](ClO4)3 (3) and [Co(L)2](ClO4) (4), where L− is the monoanion of the ditopic ligand N′-(1-(pyridin-2-yl)ethylidene)pyridine-2-carbohydrazide (LH) built on a picolinoyl hydrazone core fragment, and possessing a bidentate and a tridentate coordination pocket. The tetranuclear cation of 1·0.8H2O·MeOH is a strictly planar, rectangular [2 × 2] grid. Two 2.21011 L− ligands bridge adjacent CuII atoms on the short sides of the rectangle through their alkoxide oxygen atoms, and two 2.11111 ligands bridge adjacent CuII atoms on the long sides of the rectangle through their diazine groups; two metal ions are 5-coordinate and two are 6-coordinate. The tetranuclear cation of 2·0.2H2O·3EtOH is a square [2 × 2] grid. The two 6-coordinate NiII atoms of each side of the square are bridged by the alkoxide O atom of one 2.21011 L− ligand. The dinuclear cation of 3·0.8H2O·1.3MeOH contains two low-spin octahedral CoIII ions bridged by three 2.01111 L− ligands forming a pseudo triple helicate. In the mononuclear cation [Co(L)2]+ of complex 4, the low-spin octahedral CoIII center is coordinated by two tridentate chelating, meridional 1.10011 ligands. The crystal structures of the complexes are stabilized by a variety of π–π stacking and/or H-bonding interactions. Compounds 2, 3 and 4 are the first structurally characterized nickel and cobalt complexes of any form (neutral or anionic) of LH. The 2.01111 and 1.10011 coordination modes of L−, observed in the structures of complexes 3 and 4, have been crystallographically established for the first time in coordination complexes containing this anionic ligand. Variable-temperature, solid-state dc magnetic susceptibility and variable-field magnetization studies at 1.8 K were carried out on complexes 1 and 2. Antiferromagnetic metal ion···metal ion exchange interactions are present in both complexes. The study reveals that the cation of 1 can be considered as a practically isolated pair of strongly antiferromagnetically coupled (through the diazine group of L−) dinulear units. The susceptibility data for 2 were fit to a single-J model for an S = 1 cyclic tetramer. The values of the J parameters have been rationalized in terms of known magnetostructural correlations. Spectral data (infrared (IR), ultraviolet/visible (UV/VIS), 1H nuclear magnetic resonance (NMR) for the diamagnetic complexes) are also discussed in the light of the structural features of 1–4 and the coordination modes of the organic and inorganic ligands that are present in the complexes. The combined work demonstrates the ligating flexibility of L−, and its usefulness in the synthesis of complexes with interesting structures and properties.

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Section: Introductionmentioning

confidence: 99%

Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-Pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters

et al. 2019

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“…In recent years, transition metal complexes with Schiff base ligands have been extensively studied [4][5][6], and these compounds are an important class of compounds because of their applications in many fields. For example, optical and magnetic materials [7,8], photophysical properties materials [9], supramolecular architectures [10][11][12][13][14] etc.…”

Section: Discussionmentioning

confidence: 99%

Synthesis and crystal structure of tetrakis(μ₂-methanolato)-dimethanol-bis(μ₂-2-acetyl-1,3-bis(3,5-dibromo-2-oxidophenyl)propane-1,3-bis(olato)-κ⁵ O ¹,O ²,O ³:O ³,O ⁴,O ⁵)tetramanganese(III), C₄₀H₄₀Br₈Mn₄
Zhao
¹
,
Zhao
²
,
Li
³

et al. 2017
Zeitschrift Für Kristallographie - New Crystal Structures
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“…These compounds can be used as potential chelating agents and excellent coordination abilities with many metals [4][5][6][7][8][9]. Oxime-type compounds and their complexes could be applied in many fields, such as magnetic materials [10][11][12], optical materials [13][14][15] etc. Herein we report on a new Mn(III) complexes, which may be related to literature known manganese complexes [16][17][18][19].…”

Section: Discussionmentioning

confidence: 99%

Synthesis and crystal structure tetrakis(μ₂-methanolato)-dimethanol-bis(μ₂-2-acetyl-1,3-bis(3,5-dichloro-2-oxidophenyl)propane-1,3-bis(olato)-κ⁵ O ¹,O ²,O ³:O ³,O ⁴,O ⁵), tetramanganese(III), C₄₀H₄₀Cl₈Mn₄
Zhao
¹
,
Zhao
²
,
Li
³

et al. 2017
Zeitschrift Für Kristallographie - New Crystal Structures
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0
0
0
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Tetranuclear manganese(II) complexes of hydrazone and carbohydrazone ligands: Synthesis, crystal structures, magnetic properties, Hirshfeld surface analysis and DFT calculations

Cited by 26 publications

References 47 publications

Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-Pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters

Diversity of Coordination Modes in a Flexible Ditopic Ligand Containing 2-Pyridyl, Carbonyl and Hydrazone Functionalities: Mononuclear and Dinuclear Cobalt(III) Complexes, and Tetranuclear Copper(II) and Nickel(II) Clusters

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