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2,5-Bis{N-(2,6-diisopropylphenyl)iminomethyl}pyrrolyl Complexes of the Divalent Lanthanides: Synthesis and Structures

“…Recently we and other groups were attracted by 2,5-bis( N -aryliminomethyl)pyrrolyls, which can serve as unique monoanionic nitrogen ligands in coordination chemistry. Some actinide complexes in which the 2,5-bis( N -aryliminomethyl)pyrrole structural motif was part of a larger oligodentate macrocyclic ligand were published as the first examples in this area. − Later some macrocyclic multinuclear nickel compounds were reported. , The first transition-metal complexes with the tridentate 2,5-bis( N -aryliminomethyl)pyrrolyl ligands were reported by Bochmann et al Today alkali-metal, , aluminum, group 4, iron, chromium, copper, and rare-earth-metal complexes − ligated by 2,5-bis( N -aryliminomethyl)pyrrolyls are known. The coordination mode of the resulting complexes depends on the steric bulk of the aryl substituents of the ligand, the number of ligands coordinated, the ionic radius of the metal center, and the bulkiness of additional ligands coordinated to the metal atom.…”

“…[1][2][3] Later some macrocyclic multinuclear nickel compounds were reported. 4,5 The first transition-metal complexes with the tridentate 2,5-bis(N-aryliminomethyl)pyrrolyl ligands were reported by Bochmann et al 6 Today alkali-metal, 7,8 aluminum, 9 group 4, 6 iron, 6 chromium, 8 copper, 10 and rare-earth-metal…”

Dimeric complexes of lithium and sodium forming a tetrametallacyclobuta[1,2:1,4:2,3:3,4]tetracyclopentane structure

“…[1][2][3] Later, some macrocyclic multinuclear nickel compounds were reported. 4,5 In 2000, Bochmann et al 6 introduced the tridentate 2,5-bis(aryliminomethyl)pyrrolyl ligand in transition metal chemistry. Today aluminium, 7 group 4, 6 iron, 6 chromium, 8 copper, 9 and rare earth metal complexes [10][11][12] are known.…”

Exploring the influence of steric hindrance and electronic nature of substituents in the supramolecular arrangements of 5-(substituted phenyl)-2-formylpyrroles

“…30 While planning the preparation of a new set of 5-IJsubstituted phenyl)-2-formyl-1H-pyrroles, in which the phenyl group has different electronic and steric features (Scheme 1, D), we performed a specific search for this type of compound in the CCDC but no results were retrieved. The closest examples reported in the literature included 3-IJmorpholin-4yl)-5-phenyl-2-formylpyrrole 31 or, considering any kind of substituent at position 5 of the pyrrole ring, 5-IJ(2-aminophenyl)iminomethyl)-2-formylpyrrole 32 and 5-IJpyrrol-2-ylmethyl)-2formylpyrrole, 33 all presenting the typical dimerisation pattern.…”