Synthesis, Structure and Magnetic Property of a Terephthalato-bridged Nickel(Ⅱ) Tetraazamacrocyclic Complex

Chem. J. Chinese Universities

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Synthesis, Structure and Magnetic Property of a Terephthalato-bridged Nickel(Ⅱ) Tetraazamacrocyclic Complex

JI Cong-Min, ZHANG Bing, CUI Ai-Li*, KOU Hui-Zhong

Department of Chemistry, Tsinghua University, Beijing 100084, China

Received:2008-01-28 Revised:1900-01-01 Online:2008-06-10 Published:2008-06-10
Contact: CUI Ai-Li

Abstract

Abstract: A new terephthalato-bridged nickel(Ⅱ) complex with a teraazamacrocyclic ligand, [Ni(L)tp]_∞(L=5-benzyl-4,6-bimethyl-1,3,7,10-tetraaza-cyclotetradecane) was synthesized and characterized. On the basis of the X-ray crystallographic study, each Ni(Ⅱ) ion lies in a distorted octahedral environment, and the terephthalato ligand bridges two Ni(Ⅱ) ions in a trans fashion. The [Ni(L)]²⁺ and the tp^2- groups are alternatively arranged yielding a one-dimensional coordination polymer. Magnetic measurements show that the decrease of χ_mT below 25 K gave a Weiss constant of θ=-0.49 K. This behavior may be due to a very weak intrachain magnetic superexchange through the tp2- bridge, a weak interchain exchange interaction and the zero-field splitting(ZFS) of octahedral Ni(Ⅱ) ions.

Key words: Coordination compound, Terephthalato-bridge, Magnetic property, Nickel(Ⅱ), Teraazamacrocycle

CLC Number:

O614

TrendMD:

JI Cong-Min, ZHANG Bing, CUI Ai-Li*, KOU Hui-Zhong
. Synthesis, Structure and Magnetic Property of a Terephthalato-bridged Nickel(Ⅱ) Tetraazamacrocyclic Complex[J]. Chem. J. Chinese Universities, doi: .

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Synthesis, Structure and Magnetic Property of a Terephthalato-bridged Nickel(Ⅱ) Tetraazamacrocyclic Complex

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