Synthesis, structural characterizations, spectroscopic and magnetic properties of Mnup>IIup> and Mnup>IIIup> complexes with an unprecedented bridging coordination mode of 2-salicylichydrazono-1,3-dithiolane ligand

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• 作者：Chahra Bouchameniup>aup> ; Chahrazed Beghidjaup>aup>up> ; up>up>c.beghidja@yahoo.fr"" rel=""nofollowup> ; Adel Beghidjaup>aup> ; Pierre Rabuup>bup> ; Richard Welterup>cup>up> ; up>up>welter@chimie.u-strasbg.fr"" rel=""nofollowup>up> ; up>up>welter@unistra.fr"" rel=""nofollowup>
• 关键词：Mn complexes ; Crystal structure ; 2-Salicylichydrazono-1 ; 3-dithiolane ; Molecular magnetism ; H-bond ; EPR
• 刊名：Polyhedron
• 出版年：2011
• 出版时间：21 June 2011
• 年：2011
• 卷：30
• 期：11
• 页码：1774-1778
• 全文大小：854 K

文摘

Two new complexes [Mnup>IIIup>(HL)ub>2ub>(acac)] and [Mnup>IIup>(HL)ub>2ub>]ub>nub> have been obtained by reacting manganese(III) acetylacetonate monohydrate or manganese(II) chloride monohydrate with 2-salicylichydrazono-1,3-dithiolane ligand (Hub>2ub>L). Both compounds have been fully characterized by spectroscopic methods and single crystal X-ray diffraction. In the solid state, the molecular packing are described and discussed in term of weak H-bonds and short contacts. The unprecedented bridging coordination mode of this ligand lead to the first 2-salicylichydrazono-1,3-dithiolane-bridged coordination polymer [Mnup>IIup>(HL)ub>2ub>]ub>nub>. The EPR spectrum of this compound was obtained with g ≈ 2.07, corresponding to a manganese ion (+II) in octahedral high-spin coordination sphere. The Mnup>IIup> complex exhibit paramagnetic behavior corresponding to quasi-isolated metal centers.