A Unique μ‐dichloro‐Bridged Butterfly‐shaped Dimer: Synthesis and Crystal Structure of [Cu(bpmh)Cl2]2 (bpmh=2,2′‐bipyridyl‐3‐carbomethoxy‐3′‐formylhydrazine), Roles of π–π Interaction and Steric Hindrance Effect in Crystal Packing

Autor: Pei-Kun Chen, Ben-Lai Wu, Hong-Yan Mao, Yu Zhu, Ming‐xing Yao, Hong-Quan Zhang, Xiao-Qing Shen, Hongwei Hou, Hong-Yun Zhang
Rok vydání: 2005
Předmět:
Zdroj: Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry. 35:423-428
ISSN: 1553-3182
1553-3174
DOI: 10.1081/sim-200059235
Popis: The title complex, [Cu(bpmh)Cl2]2, was formed from Cu(II) with 2,2′‐bipyridyl‐3‐ carbomethoxy‐3′‐formyhydrazine (bpmh), by‐product of the reaction of 2,2′‐bipyridyl‐3,3′‐dicarbomethoxy (bpdc) with hydrazine hydrate, during the preparation of the copper(II) complex of bpdh (bpdh=2,2′‐bipyridyl‐3,3′‐diformylhydrazine) in acetone. The structure of [Cu(bpmh)Cl2]2 has been determined by X‐ray diffraction analysis as a μ‐dichloro‐bridged, butterfly‐shaped dimer. The dimer unit, [Cu(bpmh)Cl2]2, crystallizes in the monoclinic space group C2/c. The geometry of the copper centers is tetragonal‐pyramidal with two chlorine atoms and two pyridine nitrogen atoms in the base and one bridged chlorine atom at the apex. The values of the bridging angle, out‐of‐plane Cu(1B)‐Cl(2A) distance, and Cu(1)‐Cu(1A) separation are 87.7°, 2.881 A and 3.584 A, respectively. The crystal packing pattern of [Cu(bpmh)Cl2]2 is influenced by π−π interaction and steric hindrance.
Databáze: OpenAIRE
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