Two new azido bridging Mn(II) 1D systems: Synthesis and characterization of trans-[Mn(N<sub>3sub>)<sub>2sub>(2-aminopyridine)<sub>2sub>]<sub>nsub> and trans-[Mn(N<sub>3sub>)<sub>2sub>(4-azidopyridine)<sub>2sub>]<sub>nsub>

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• 作者：Franz A. Mautner ; Andreas Egger ; Beate Sodin ; Mohamed A.S. Goher ; Morsy A.M. Abu-Youssef ; Alshima’ ; a Massoud ; Albert Escuer ; Ramon Vicente
• 关键词：Pyridine derivative ligands ; Manganese(II) ; Azido bridging ; Spectra ; Crystal structure ; Magnetic properties
• 刊名：Journal of Molecular Structure
• 出版年：2010
• 出版时间：22 April 2010
• 年：2010
• 卷：969
• 期：1-3
• 页码：192-196
• 全文大小：622 K

文摘

Two new manganese(II) azido complexes [Mn(L)<sub>2sub>(N<sub>3sub>)<sub>2sub>]<sub>nsub> with L = 2-aminopyridine (1) and 4-azidopyridine (2) have been synthesized and structurally characterized by spectroscopic and crystallographic methods. Both complexes 1 and 2 crystallize in the triclinic system, space group P-1, and their structures are featuring six-coordinate manganese centres, chains of [Mn(N<sub>3sub>)<sub>2sub>]<sub>nsub>, and two trans 2-aminopyridine or 4-azidopyridine ligands giving 1D systems. In the [Mn(N<sub>3sub>)<sub>2sub>]<sub>nsub>-chains of 1 each manganese atom is connected by double di end-on (EO) azido bridges forming cyclic Mn<sub>2sub>N<sub>2sub> units, whereas in 2, the metal centers are alternatively bridged by double di-end-to-end (EE) and double di end-on (EO) azido ligands. The intra-chain Mn…Mn distances are 3.5350(12) in 1, and 3.3701(18) and 5.032(3) Å, in 2, respectively. In 1 the polymeric chains of polyhedra are connected by hydrogen bonds of type N–H…N to generate a 2D supramolecular network. Magnetic susceptibility measurements were performed only for complex 1 which shows weak ferromagnetic interactions with a J value of 1.2 cm<sup>−1sup>.