Crystal structures and magnetic properties of triple helical binuclear complexes with bis(bidentate) diazine ligands

Yan Feng Yue; En Qing Gao; Chen Jie Fang; Zheng He; Shi Qiang Bai; Chun Hua Yan

doi:10.1016/j.poly.2006.04.008

Crystal structures and magnetic properties of triple helical binuclear complexes with bis(bidentate) diazine ligands

Yan Feng Yue
, En Qing Gao
, Chen Jie Fang
, Zheng He
, Shi Qiang Bai
, Chun Hua Yan^*

^*Corresponding author for this work

School of Chemistry and Molecular Engineering

Peking University

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

Three triple helical binuclear complexes [Ni₂(L¹)₃] · (ClO₄)₄ · (H₂O)₃ (1) (L¹ = 1,4-bis(2-pyridyl)-1-amino-4-methyl-2,3-diaza-1,3-butadiene), [Ni₂(L²)₃] · (ClO₄)₄ · (H₂O)₃ (2) (L² = 2,5-bis(2-pyridyl)-3,4-diaza-2,4-hexadiene) and [Mn₂(L¹)₃] · (ClO₄)₄ · (H₂O)₃ (3) have been studied, where the Lⁱ ligand possesses a rotationally flexible single N-N bond. In complexes 1-3, the three bis(bidentate) diazine ligands wrap around two metal cations with a spiral conformation, leading to a triple helicate with C₃ symmetry. Magnetic investigations revealed that antiferromagnetic interactions are operative between the two metal ions linked by the triple diazine bridges, with J = -2.97 and -5.40 cm^-1 for 1 and 2, respectively. Variable temperature magnetic data for 3 indicates a weak ferromagnetic interaction between the two manganese(II) centers with J = 1.24 cm^-1. The X-ray powder diffraction of 3 is also discussed.

Original language	English
Pages (from-to)	2778-2784
Number of pages	7
Journal	Polyhedron
Volume	25
Issue number	14
DOIs	https://doi.org/10.1016/j.poly.2006.04.008
State	Published - 23 Oct 2006

Keywords

Binuclear helicate
Bis(bidentate) diazine ligands
Crystal structures
Magnetism
Supramolecular self-assembly

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10.1016/j.poly.2006.04.008

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@article{d99808f63c594a338a7448cf3133a23d,

title = "Crystal structures and magnetic properties of triple helical binuclear complexes with bis(bidentate) diazine ligands",

abstract = "Three triple helical binuclear complexes [Ni2(L1)3] · (ClO4)4 · (H2O)3 (1) (L1 = 1,4-bis(2-pyridyl)-1-amino-4-methyl-2,3-diaza-1,3-butadiene), [Ni2(L2)3] · (ClO4)4 · (H2O)3 (2) (L2 = 2,5-bis(2-pyridyl)-3,4-diaza-2,4-hexadiene) and [Mn2(L1)3] · (ClO4)4 · (H2O)3 (3) have been studied, where the Li ligand possesses a rotationally flexible single N-N bond. In complexes 1-3, the three bis(bidentate) diazine ligands wrap around two metal cations with a spiral conformation, leading to a triple helicate with C3 symmetry. Magnetic investigations revealed that antiferromagnetic interactions are operative between the two metal ions linked by the triple diazine bridges, with J = -2.97 and -5.40 cm-1 for 1 and 2, respectively. Variable temperature magnetic data for 3 indicates a weak ferromagnetic interaction between the two manganese(II) centers with J = 1.24 cm-1. The X-ray powder diffraction of 3 is also discussed.",

keywords = "Binuclear helicate, Bis(bidentate) diazine ligands, Crystal structures, Magnetism, Supramolecular self-assembly",

author = "Yue, \{Yan Feng\} and Gao, \{En Qing\} and Fang, \{Chen Jie\} and Zheng He and Bai, \{Shi Qiang\} and Yan, \{Chun Hua\}",

year = "2006",

month = oct,

day = "23",

doi = "10.1016/j.poly.2006.04.008",

language = "英语",

volume = "25",

pages = "2778--2784",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Ltd",

number = "14",

}

TY - JOUR

T1 - Crystal structures and magnetic properties of triple helical binuclear complexes with bis(bidentate) diazine ligands

AU - Yue, Yan Feng

AU - Gao, En Qing

AU - Fang, Chen Jie

AU - He, Zheng

AU - Bai, Shi Qiang

AU - Yan, Chun Hua

PY - 2006/10/23

Y1 - 2006/10/23

N2 - Three triple helical binuclear complexes [Ni2(L1)3] · (ClO4)4 · (H2O)3 (1) (L1 = 1,4-bis(2-pyridyl)-1-amino-4-methyl-2,3-diaza-1,3-butadiene), [Ni2(L2)3] · (ClO4)4 · (H2O)3 (2) (L2 = 2,5-bis(2-pyridyl)-3,4-diaza-2,4-hexadiene) and [Mn2(L1)3] · (ClO4)4 · (H2O)3 (3) have been studied, where the Li ligand possesses a rotationally flexible single N-N bond. In complexes 1-3, the three bis(bidentate) diazine ligands wrap around two metal cations with a spiral conformation, leading to a triple helicate with C3 symmetry. Magnetic investigations revealed that antiferromagnetic interactions are operative between the two metal ions linked by the triple diazine bridges, with J = -2.97 and -5.40 cm-1 for 1 and 2, respectively. Variable temperature magnetic data for 3 indicates a weak ferromagnetic interaction between the two manganese(II) centers with J = 1.24 cm-1. The X-ray powder diffraction of 3 is also discussed.

AB - Three triple helical binuclear complexes [Ni2(L1)3] · (ClO4)4 · (H2O)3 (1) (L1 = 1,4-bis(2-pyridyl)-1-amino-4-methyl-2,3-diaza-1,3-butadiene), [Ni2(L2)3] · (ClO4)4 · (H2O)3 (2) (L2 = 2,5-bis(2-pyridyl)-3,4-diaza-2,4-hexadiene) and [Mn2(L1)3] · (ClO4)4 · (H2O)3 (3) have been studied, where the Li ligand possesses a rotationally flexible single N-N bond. In complexes 1-3, the three bis(bidentate) diazine ligands wrap around two metal cations with a spiral conformation, leading to a triple helicate with C3 symmetry. Magnetic investigations revealed that antiferromagnetic interactions are operative between the two metal ions linked by the triple diazine bridges, with J = -2.97 and -5.40 cm-1 for 1 and 2, respectively. Variable temperature magnetic data for 3 indicates a weak ferromagnetic interaction between the two manganese(II) centers with J = 1.24 cm-1. The X-ray powder diffraction of 3 is also discussed.

KW - Binuclear helicate

KW - Bis(bidentate) diazine ligands

KW - Crystal structures

KW - Magnetism

KW - Supramolecular self-assembly

UR - https://www.scopus.com/pages/publications/33748454482

U2 - 10.1016/j.poly.2006.04.008

DO - 10.1016/j.poly.2006.04.008

M3 - 文章

AN - SCOPUS:33748454482

SN - 0277-5387

VL - 25

SP - 2778

EP - 2784

JO - Polyhedron

JF - Polyhedron

IS - 14

ER -

Crystal structures and magnetic properties of triple helical binuclear complexes with bis(bidentate) diazine ligands

Abstract

Keywords

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