Structural Diversity of Metallosupramolecular Assemblies from Cu(phen)²⁺ (phen = 1,10‐Phenanthroline) Building Blocks and 4,4′‐Bipyridine

Abstract

Attempts to crystal engineer metallosupramolecular complexes from Cu(phen) 2+ building blocks and the prototypical, rod-like, exo-bidentate ligand 4,4'-bipyridine (4,4'-bipy) by layering techniques are described. Reactions of Cu(phen) 2+ (phen = 1,10-phenanthroline) with 4,4'-bipy in the presence of NO 3 counterions yielded two distinct, discrete, dinuclear, C i symmetric, dumbbell-type complexes,[{Cu(NO 3 ) 2 (phen)} 2 (4,4'-bipy)](1) and [{Cu(NO 3 )(phen)(H 2 O)} 2 (4,4'-bipy)](NO 3 ) 2 (2), depending upon the mixture of solvents used for crystallization. In compound 1, a monoand a bidentate nitrato group coordinate to Cu 2+ , whereas in 2 the monodentate nitrato groups are replaced by aqua ligands, which introduce additional hydrogen-bond donor functionality to the molecule. The crystal structure of 1 was determined by single-crystal X-ray analysis at 296 and 110 K. Upon cooling, a disorder-order transition oc-

Dinuclear and mononuclear metal(II) polypyridyl complexes against drug-sensitive and drug-resistant Plasmodium falciparum and their mode of action

“…1 ). The structure of 3 is similar to those reported previously [ 33 , 34 ]. The environment about each copper(II) atom in ( 3 ) is a distorted octahedron, with Cu-N1(phen), Cu-N2(phen), Cu-N3(amino-4,4'-bipy), Cu-O1(OH 2 ), Cu-O6(ONO 2 ) and Cu-O5(ONO 2 ) bond distances of 2.028, 2.016, 1.986, 2.224, 1.994 and 2.707 Ǻ (Additional file 1 : Table S2).…”

Copper(II) Coordination Polymers Generated from 1,3‐Bis(4‐pyridyl)propane: Synthesis, Structures, and Spectroscopic Studies

“…The aim was achieved as will be seen later, and this strategy seems to be a good one to control the system dimensionality. In fact, the approach of using [Cu(N^N)] 2+ molecular corners (N^N = nitrogen bidentate chelating ligand such as 2,2'‐bipyridine or 1,10‐phenanthroline) as building blocks is already known in the literature 9,34,35. The same synthesis was carried out using Cu(NO 3 ) 2 · 3H 2 O, instead of Cu(ClO 4 ) 2 · 6H 2 O, affording a purple powder that even after recrystallization from dmso, did not produce crystals suitable for X‐ray diffraction analysis. …”

Transformations of Polymers of 4,4'-Dipyridyl and Cobalt(II) and Manganese(II) Cymantrenates in the Presence of N-Donors of Different Denticity

“…Note that if we do not take into account additional dipy molecules as a two-electron N-donor, leading to the formation of 2D-CPs [18][19][20][21][22][23][24][25], then polymers of manganese(II) and cobalt(II) with these molecules are unknown [26]. [28]; M = Cu: Q = bpy, An = η-OClO 3 ; Q = Phen, An = η-OClO 3 , ClO 4 [29]; Q = Phen, An = η-OSO 2 CF 3 [30]; Q = bpy, An = η-ONO 2 [31]; Q = bpy, L = 2H 2 O, An = NO 3 [32]; Q = bpy, An = η-OClO 3 , H 2 O(solv. ); Q = bpy, An = η-FBF 3 , H 2 O(solv) [33]; M = Co: Q = Phen, An = η-PhPO 3 [32]) were isolated.…”