Abstract
The reaction of pyrrole-2,5-dicarbaldehyde (1) with o-phenylenediamine (2) in anhydrous EtOH afforded a [1+1]-condensation product, viz., Schiff"s base. The structure of the latter was established by NMR spectroscopy and X-ray diffraction analysis. The reaction of this product or a mixture of 1 and 2 with Ni9(μn-OOCBut)12(HOOCBut)4(μ4-OH)3(μ3-OH)3 in MeCN in the presence of AcOH gave rise to an antiferromagnetic binuclear complex. According to the X-ray diffraction data, the macrocycle in the latter complex is a [2+2]-condensation product of compounds 1 and 2, μeff ranging from 0.569 to 2.614 μB (2—301 K), –2J = 360 cm–1. The Ni2(OAc)2 fragment is located in the central cavity of the macrocycle. The structures of the condensation products are discussed based on the results of DFT quantum-chemical calculations.
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Chernyadyev, A.Y., Ustynyuk, Y.A., Yazev, O.V. et al. Binuclear and polynuclear transition metal complexes with macrocyclic ligands 1. Synthesis and the structure of an antiferromagnetic binuclear nickel complex prepared by the reaction of o-phenylenediamine with pyrrole-2,5-dicarbaldehyde and nickel pivalate. Russian Chemical Bulletin 50, 2445–2450 (2001). https://doi.org/10.1023/A:1015012302947
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DOI: https://doi.org/10.1023/A:1015012302947