1D nickel(II) coordination polymer with pyrimidine and pivalate bridges: Synthesis, structure and magnetic properties

Evstifeev, Igor S.; Кискин, М. А.; Mironov, V. S.; Bogomyakov, A. S.; Сидоров, А. А.; Новоторцев, В. М.; Еременко, И. Л.

doi:10.1016/j.inoche.2010.01.020

Cited by 18 publications

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“…Previously reported carboxylate complexes of transition metals ions formed polymeric compounds with pyrimidine [ 50 ], so the formation of the molecular complex 5 is uncommon. At the same time, the formation of the mixed valence hexanuclear fragment {Mn II 4 Mn III 2 (µ 4 -O) 2 (Piv) 10 } is similar to that in 5 and quite typical, for example, oxidation of [Mn(Piv) 2 (EtOH)] n (the same starting compound as in formation of 5 ) by air led to [Mn II 4 Mn III 2 (µ 4 -O) 2 (Piv) 10 (HPiv)(EtOH) 3 ] [ 51 ]; a similar hexanuclear Mn 6 core was found in polymeric compounds [ 40 , 52 ].…”

Section: Resultsmentioning

confidence: 99%

Versatile Reactivity of MnII Complexes in Reactions with N-Donor Heterocycles: Metamorphosis of Labile Homometallic Pivalates vs. Assembling of Endurable Heterometallic Acetates

et al. 2021

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Reaction of 2,2′-bipyridine (2,2′-bipy) or 1,10-phenantroline (phen) with [Mn(Piv)2(EtOH)]n led to the formation of binuclear complexes [Mn2(Piv)4L2] (L = 2,2′-bipy (1), phen (2); Piv- is the anion of pivalic acid). Oxidation of 1 or 2 by air oxygen resulted in the formation of tetranuclear MnII/III complexes [Mn4O2(Piv)6L2] (L = 2,2′-bipy (3), phen (4)). The hexanuclear complex [Mn6(OH)2(Piv)10(pym)4] (5) was formed in the reaction of [Mn(Piv)2(EtOH)]n with pyrimidine (pym), while oxidation of 5 produced the coordination polymer [Mn6O2(Piv)10(pym)2]n (6). Use of pyrazine (pz) instead of pyrimidine led to the 2D-coordination polymer [Mn4(OH)(Piv)7(µ2-pz)2]n (7). Interaction of [Mn(Piv)2(EtOH)]n with FeCl3 resulted in the formation of the hexanuclear complex [MnII4FeIII2O2(Piv)10(MeCN)2(HPiv)2] (8). The reactions of [MnFe2O(OAc)6(H2O)3] with 4,4′-bipyridine (4,4′-bipy) or trans-1,2-(4-pyridyl)ethylene (bpe) led to the formation of 1D-polymers [MnFe2O(OAc)6L2]n·2nDMF, where L = 4,4′-bipy (9·2DMF), bpe (10·2DMF) and [MnFe2O(OAc)6(bpe)(DMF)]n·3.5nDMF (11·3.5DMF). All complexes were characterized by single-crystal X-ray diffraction. Desolvation of 11·3.5DMF led to a collapse of the porous crystal lattice that was confirmed by PXRD and N2 sorption measurements, while alcohol adsorption led to porous structure restoration. Weak antiferromagnetic exchange was found in the case of binuclear MnII complexes (JMn-Mn = −1.03 cm−1 for 1 and 2). According to magnetic data analysis (JMn-Mn = −(2.69 ÷ 0.42) cm−1) and DFT calculations (JMn-Mn = −(6.9 ÷ 0.9) cm−1) weak antiferromagnetic coupling between MnII ions also occurred in the tetranuclear {Mn4(OH)(Piv)7} unit of the 2D polymer 7. In contrast, strong antiferromagnetic coupling was found in oxo-bridged trinuclear fragment {MnFe2O(OAc)6} in 11·3.5DMF (JFe-Fe = −57.8 cm−1, JFe-Mn = −20.12 cm−1).

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Section: Resultsmentioning

confidence: 99%

Versatile Reactivity of MnII Complexes in Reactions with N-Donor Heterocycles: Metamorphosis of Labile Homometallic Pivalates vs. Assembling of Endurable Heterometallic Acetates

et al. 2021

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“…23 Magnetic behavior of these compounds is very sensitive to the molecular and electronic structure of metal centers and organic ligands. 24 …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Structural Characterization of a Binuclear Mixed‐Ligand (Salicylate and N,N‐diethylnicotinamide) Nickel(II) Complex, Its Magnetic Properties. [Ni₂(µ‐Sal)₄(Dena)₂]H₂O

Köse

Akkurt

Şahın

et al. 2014

J Chinese Chemical Soc

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16 , has been synthesized and explained as structure using some elemental analyses. FT-IR spectra, UV-Vis reflectance, magnetic measurements, thermal analysis and x-ray diffraction methods. The results showed that the unit cell of complex includes two molecules Ni II cation, four molecules salicylates as bridge and two molecules N,N-diethylnicotinamide ligands, also there is one molecule hydrated aqua. The compound crystallizes in the monoclinic space group P2 1 /c with the following unit-cell parameters: a = 13.6776(6) Å, b = 10.5238(3) Å, c = 21.8165(9), a = 90.00º, b = 126.546(3)º, g = 90.00º and Z = 2. The compound [Ni 2 (m-Sal) 4 (Dena) 2 ]H 2 O is a typical paddle-wheel complex structure. Two Ni II ions are bridged by four salicylate ligands (O2, O2 i , O3, O3 i , O5, O5 i , O6 and O6 i ) using a m-COOcoordination mode [symmetry code: (i) 1-x, 1-y, 1-z]. Each Ni II also coordinates to one nitrogen atom (N1 and N1 i ) from one N,N-diethylnicotinamide ligand molecule in the axial position. The complex has strong paramagnetic properties.

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“…Electron transfer parameters are derived by projection of 3d-rich molecular orbitals of the Ni-Ni pair onto pure 3d atomic orbitals of two metal atoms, as described in [22]. The Ni↔Ni charge-transfer energy is set to 65000 cm −1 (8 eV); this approach has been recently used to analyze magnetic properties of a polymeric Ni (II) compound [23]. Thus we obtain the set of exchange parameters in the Ni 11 (1) atom are especially small, 2J 12 = −0.59 and 2J 15 = +0.02 cm −1 .…”

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Synthesis, structure, and magnetic properties of new pyridonate–pivalate nickel(II) complex, [Ni11(OH)2(mhp)8(Piv)10(HCO2)2(H2O)2(Hmhp)2(HPiv)2] (mhp = 6-methyl-2-pyridonate), containing formate bridges

Никифорова

Кискин

Bogomyakov

et al. 2011

Inorganic Chemistry Communications

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1D nickel(II) coordination polymer with pyrimidine and pivalate bridges: Synthesis, structure and magnetic properties

Cited by 18 publications

References 23 publications

Versatile Reactivity of MnII Complexes in Reactions with N-Donor Heterocycles: Metamorphosis of Labile Homometallic Pivalates vs. Assembling of Endurable Heterometallic Acetates

Versatile Reactivity of MnII Complexes in Reactions with N-Donor Heterocycles: Metamorphosis of Labile Homometallic Pivalates vs. Assembling of Endurable Heterometallic Acetates

Synthesis and Structural Characterization of a Binuclear Mixed‐Ligand (Salicylate and N,N‐diethylnicotinamide) Nickel(II) Complex, Its Magnetic Properties. [Ni₂(µ‐Sal)₄(Dena)₂]H₂O

Synthesis, structure, and magnetic properties of new pyridonate–pivalate nickel(II) complex, [Ni11(OH)2(mhp)8(Piv)10(HCO2)2(H2O)2(Hmhp)2(HPiv)2] (mhp = 6-methyl-2-pyridonate), containing formate bridges

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1D nickel(II) coordination polymer with pyrimidine and pivalate bridges: Synthesis, structure and magnetic properties

Cited by 18 publications

References 23 publications

Versatile Reactivity of MnII Complexes in Reactions with N-Donor Heterocycles: Metamorphosis of Labile Homometallic Pivalates vs. Assembling of Endurable Heterometallic Acetates

Versatile Reactivity of MnII Complexes in Reactions with N-Donor Heterocycles: Metamorphosis of Labile Homometallic Pivalates vs. Assembling of Endurable Heterometallic Acetates

Synthesis and Structural Characterization of a Binuclear Mixed‐Ligand (Salicylate and N,N‐diethylnicotinamide) Nickel(II) Complex, Its Magnetic Properties. [Ni2(µ‐Sal)4(Dena)2]H2O

Synthesis, structure, and magnetic properties of new pyridonate–pivalate nickel(II) complex, [Ni11(OH)2(mhp)8(Piv)10(HCO2)2(H2O)2(Hmhp)2(HPiv)2] (mhp = 6-methyl-2-pyridonate), containing formate bridges

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Synthesis and Structural Characterization of a Binuclear Mixed‐Ligand (Salicylate and N,N‐diethylnicotinamide) Nickel(II) Complex, Its Magnetic Properties. [Ni₂(µ‐Sal)₄(Dena)₂]H₂O