Structural design and magnetic properties study on two nitronyl nitroxide radicals–MnII complexes with hetero chain or mononuclear tri-spin structures

Zhou, Na; Wang, Yali; Wang, Haili; Li, Wenjiao; Guo, Zhilin; Ma, Yue; Li, Licun; Wang, Qing‐Lun; Cheng, Peng; Liao, Dan

doi:10.1016/j.poly.2014.12.032

Cited by 5 publications

(1 citation statement)

References 33 publications

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“…If we assume that the acceptor ability of the manganese atom in Pz-NN−{Mn} is not sufficient to bind one more ligand, then the formation of a cyclic dimer with pairwise coordination bonds becomes preferable and therefore leads to precipitation of 4. Incidentally, the reasons may be the same for the frequent formation of such dimers during the interaction of [Mn(hfac) 2 ] with hetaryl-substituted nitronyl nitroxides [38,[42][43][44][45][46]. The structure of the two remaining complexes, 2 and 3, is unprecedented.…”

Section: Synthesis and Crystal Structures Of Manganese-nitroxide Comp...mentioning

confidence: 99%

An Influence of Fluorinated Alkyl Substituents on Structure and Magnetic Properties of Mn(II) Complexes with Pyrazolyl-Substituted Nitronyl Nitroxides

Kudryavtseva,

Serykh,

Ugrak

et al. 2023

Crystals

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New complexes of manganese(II) hexafluoroacetylacetonate [Mn(hfac)2] with 2-(1-R-3-pyrazol-4-yl)-4,4,5,5-tetramethyl-2-imidazoline-3-oxide-1-oxyl (R = CHF2, CH2CH2F, CH2CHF2 or CH2CF3) were synthesised and characterised structurally and magnetically. All complexes were prepared under similar conditions. Nonetheless, their crystal structures were considerably different. Depending on the structure of fluorinated alkyl substituent R, the complexation reaction led to complexes of three types: chain-polymeric complexes with the head-to-head or head-to-tail motif and complexes of molecular structure. All complexes show strong antiferromagnetic behaviour in a high-temperature region (150–300 K) and weak ferro- or antiferromagnetic exchange interactions at low temperatures. The stronger antiferromagnetic exchange, −101.7 ± 1.5 or −136 ± 10 cm−1, −82.3 ± 1.3 cm−1 and −87.4 ± 1.3 cm−1, was attributed to the magnetic interaction in three- or two-spin clusters: {>N∸O–Mn2+–O∸N<} or {>N∸O–Mn2+}, respectively. The weaker antiferromagnetic interaction, −0.005, between three-spin clusters or ferromagnetic interactions, 0.18–0.81 cm−1, between two-spin clusters are realised through the pyrazole ring or intermolecular contacts.

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Section: Synthesis and Crystal Structures Of Manganese-nitroxide Comp...mentioning

confidence: 99%

An Influence of Fluorinated Alkyl Substituents on Structure and Magnetic Properties of Mn(II) Complexes with Pyrazolyl-Substituted Nitronyl Nitroxides

Kudryavtseva,

Serykh,

Ugrak

et al. 2023

Crystals

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Relationship between phase transition temperature and accessible volume for substituent in Cu(hfac)2 chain-polymer complexes with pyridine-based nitroxides

Толстиков

Smirnova²,

Колесников³

et al. 2023

Polyhedron

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A loop chain and a three-dimensional network assembled from a multi-dentate nitronyl nitroxide radical and M(hfac)₂ (M = Co^II, Cu^II)

et al. 2018

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Structural design and magnetic properties study on two nitronyl nitroxide radicals–MnII complexes with hetero chain or mononuclear tri-spin structures

Cited by 5 publications

References 33 publications

An Influence of Fluorinated Alkyl Substituents on Structure and Magnetic Properties of Mn(II) Complexes with Pyrazolyl-Substituted Nitronyl Nitroxides

An Influence of Fluorinated Alkyl Substituents on Structure and Magnetic Properties of Mn(II) Complexes with Pyrazolyl-Substituted Nitronyl Nitroxides

Relationship between phase transition temperature and accessible volume for substituent in Cu(hfac)2 chain-polymer complexes with pyridine-based nitroxides

A loop chain and a three-dimensional network assembled from a multi-dentate nitronyl nitroxide radical and M(hfac)₂ (M = Co^II, Cu^II)

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Structural design and magnetic properties study on two nitronyl nitroxide radicals–MnII complexes with hetero chain or mononuclear tri-spin structures

Cited by 5 publications

References 33 publications

An Influence of Fluorinated Alkyl Substituents on Structure and Magnetic Properties of Mn(II) Complexes with Pyrazolyl-Substituted Nitronyl Nitroxides

An Influence of Fluorinated Alkyl Substituents on Structure and Magnetic Properties of Mn(II) Complexes with Pyrazolyl-Substituted Nitronyl Nitroxides

Relationship between phase transition temperature and accessible volume for substituent in Cu(hfac)2 chain-polymer complexes with pyridine-based nitroxides

A loop chain and a three-dimensional network assembled from a multi-dentate nitronyl nitroxide radical and M(hfac)2 (M = CoII, CuII)

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A loop chain and a three-dimensional network assembled from a multi-dentate nitronyl nitroxide radical and M(hfac)₂ (M = Co^II, Cu^II)