Structural diversity in the first metal complexes of 2,5-dicarboxamidopyrroles and 2,5-dicarbothioamidopyrroles
MetadataShow full item record
Metal complexes of 2,5-dicarboxamidopyrroles and 2,5-dicarbothioamidopyrroles have been structurally characterised for the first time, complementing the significant amount of work that has been reported for the analogous pyridine ligands. N,N!-Bis(3,5-dinitrophenyl)-3,4-diphenyl-1H-pyrrole-2,5-dicarboxamide forms octahedral bis(tridentate) complexes with cobalt(III) and nickel(II), where the ligands are bound to the metal centres through deprotonated pyrrole and amide N atoms. N,N!-Dibutyl-3,4-diphenyl-1H-pyrrole-2,5-dicarboxthioamide and N,N!-diphenyl-3,4-diphenyl-1H-pyrrole-2,5-dicarboxthioamide also form bis(tridentate) cobalt complexes but are only deprotonated at the pyrrole N atom, the remainder of the coordination sphere comprising the thioamide S atoms. The dibutyl derivative was isolated as a Co(II) complex, whereas the diphenyl system deposited a Co(III) complex. In contrast, N,N!-dibutyl-3,4-dichloro-1H-pyrrole-2,5- dicarboxamide was found to act as a bidentate ligand, in an octahedral cobalt(II) complex comprising of two bidentate pyrrole ligands, and two aqua ligands. Synthesis of N,N-bis(pyridin-2-ylmethyl)-3,4-diphenyl-1H-pyrrole-2,5-carboxamide gave a pyrrole ligand with increased denticity. Reaction with cobalt(II) chloride resulted in the isolation of a dinuclear helicate complex. The ligand was found to have undergone addition of a methoxy group to one of the linking methylene carbons, presumably as a result of the oxidative addition of solvent methanol.
This journal is © The Royal Society of Chemistry 2008
Showing items related by title, author, creator and subject.
Further insight into the coordination of 2,5-dicarbothioamidopyrroles: the case of Cu and Co complexesKaragiannidis, L.; Gale, P.; Light, M; Massi, Massimiliano; Ogden, Mark (2011)The coordination chemistry of 2,5-dicarbothioamidopyrrole ligands, namely N2,N5-dibutyl-3,4-diphenyl-1H-pyrrole-2,5-bis(carbothioamide) and N2,N5,3,4-tetraphenyl-1H-pyrrole-2,5-10 bis(carbothioamide) has been investigated ...
A new method for the rapid analysis of 1H-Pyrrole-2,5-diones (maleimides) in environmental samples by two-dimensional gas chromatography time-of-flight mass spectrometry.Naeher, Sebastian; Lengger, S.; Grice, Kliti (2016)Maleimides (1H-Pyrrole-2,5-diones) are monopyrrolic pigment derivatives with specific alkyl side chains that can be directly linked to their tetrapyrrole precursors, most notably chlorophylls and bacteriochlorophylls. ...
X-ray crystal structures of nickel and cobalt alpha-hydroxyoxime-carboxylic acid synergist complexesBarnard, K.; McIldowie, Matthew; Nealon, Gareth; Ogden, Mark; Skelton, B. (2011)A reagent that has regularly found use in synergistic systems is LIX63, the active component of which is 5,8-diethyl-7-hydroxydodecan-6-oxime (LH). The use of LIX63 in conjunction with a carboxylic acid (RH) to synergistically ...