Cluster based copper(II)-azide polymer: Synthesis, structure and magnetic study

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• 作者：S ; ip Saha ; Debabrata Biswas ; Partha Pratim Chakrabarty ; Atish Dipankar Jana ; Athanassios K. Boudalis ; Saikat Kumar Seth ; Tanusree Kar
• 关键词：Ethylene diamine ; Azides ; Copper(II) ; 1D coordination polymers ; Crystal structure ; Magnetic properties
• 刊名：Polyhedron
• 出版年：2010
• 出版时间：7 December 2010
• 年：2010
• 卷：29
• 期：18
• 页码：3342-3348
• 全文大小：947 K

文摘

The reaction of ethylene diamine with Cu(NO₃)₂·3H₂O and an excess of NaN₃ (1:2:4 molar ratio) lead to the formation of copper-azido based polymer [Cu₄(N₃)₈(en)₂]_n (1), which has been successfully characterized by elemental analyses, IR spectroscopy, single-crystal X-ray diffraction and variable temperature magnetic study. X-ray crystal structure determination of 1 reveals that the structure consists of 1D chains of a centrosymmetric tetranuclear copper(II)-azido cluster, connected through double azido end-to-end bridges. Variable-temperature magnetic studies (between 2 and 300 K) suggest dominant antiferromagnetic interactions in this complex, although ferromagnetic interactions have been observed in all other copper-azido based polymers produced with ethylene diamine reported so far.