Co-ordination chemistry of 3S-aminopyrrolidine and 3S-(methylamino)pyrrolidine: crystallisation of the two diastereomers of dichloro[3S-(R,S-methylamino)pyrrolidine]palladium(II)

Crystal structure of rac-3-ammoniopyrrolidinium perchlorate,C4H12Cl2N2O8

“…Their protonation products can serve as donors in hydrogen bonds and are therefore interesting building blocks for supramolecular structures [2], The metal complexing properties of 3-aminopyrrolidine have recently been described [3], however, a crystal structure determination of this ligand, its protonated form or its metal complexes has not been reported to the best of our knowledge. The structure of the title compound can be described in terms of layers, formed by cations of the same chirality together with one …”

Palladium(ii)-based cis,trans-1,3,5-triaminocyclohexane complexes demonstrating a variety of coordination modes and architectures

“…The Pd-N and Pd-X bonds lie within expected ranges for square-planar cisdiamino-dichloro, and -dibromo palladium() complexes. [23][24][25][26] Geometrically, the position of the Pd() ions in complexes 1 and 2 differ in their orientation with respect to the cyclohexane ring resulting in a more compressed structure for 1. Contrary to this, the Pd() coordination in complex 2 results in a distorted chair conformation for the six-membered metallacycle, placing the Pd() towards the edge of the cyclohexane ring.…”

trans-Bis[(S)-(−)-2-aminomethyl-1-ethylpyrrolidine-κ2N]palladium(II) dichloride methanol trisolvate

“…Attempts to synthesize Pd-based catalysts have used [PdCl 2 (PhCN) 2 ] as the Pd precursor, in which the weakly bound benzonitrile ligands could easily be displaced by diamines (denoted NÐN) in the presence of a suitable solvent (e.g. CH 2 Cl 2 ) to form the neutral catalytic species [PdCl 2 (NÐ N)] (Sauthier et al, 2000;Newman et al, 1999;Satake et al, 1999). Surprisingly, when the chiral diamine ligand (S)-(À)-2aminomethyl-1-ethylpyrrolidine (amepd) was used (see Scheme), it displaced not only the PhCN species but also the Cl ligands, forming a [Pd(amepd) 2 ] 2+ cationic palladium complex as its solvated chloride salt, (I), the crystal structure of which we report here.…”