455905-85-8Relevant academic research and scientific papers
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
Chernyadyev,Ustynyuk,Yazev,Kataev,Reshetova,Sidorov,Aleksandrov,Ikorskii,Novotortsev,Nefedov,Eremenko,Moiseev
, p. 2445 - 2450 (2001)
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-OOCBu1)12(HOOCBu1)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.
