Coordination polymers based on trinuclear and mononuclear copper-pyrazolate building moieties connected by fumarate or 2-methylfumarate ions
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- 作者：Corrado Di Nicola ; Enrico Forlin ; Federica Garau ; Arianna Lanza ; Marta Maria Natile ; Fabrizio Nestola ; Luciano P ; olfo ; Claudio Pettinari
- 关键词：Coordination polymers ; Copper(II) complexes ; Pyrazole ; Bicarboxylates ; Isomorphous structures
- 刊名：Journal of Organometallic Chemistry
- 出版年：2012
- 出版时间：1 September, 2012
- 年：2012
- 卷：714
- 期：Complete
- 页码：74-80
- 全文大小：828 K
文摘
By reacting water solutions of pyrazole (Hpz) with copper(II) fumarate or 2-methylfumarate in solvothermal conditions two almost identical trinuclear triangular complexes, [Cu3(¦Ì3-OH)(¦Ì-pz)3{R(COO)2}(Hpz)], [R?=?CHCH, C(CH3)CH], have been obtained. The two carboxylate groups of both fumarate and 2-methylfumarate show different arrangements, one acting as monotopic ligand while the other one has a ditopic behavior. Thus, in both cases, wavy 2D isomorphous Coordination Polymers (CPs), that further self-assemble through strong H-bonds into two 3D networks, have been obtained. When copper(II) 2-methylfumarate was reacted with pyrazole at r.t. the mononuclear [Cu(Hpz)2(H2O)(2-methylfumarate)¡¤H2O] complex was, in addition, obtained. In this case the bridging dianions produce instead monodimensional CPs that self-assemble into supramolecular tapes mediated by H-bond interactions, involving coordinated and crystallization water molecules. The mononuclear and trinuclear species were preliminary tested as catalysts for the oxidation of styrene by H2O2.