Synthesis and crystal structures of six thiocyanato-connected transition metal complexes of 2,2′-biimidazole

Copper thiocyanato complexes and cocaine – a case of ‘black cocaine’

“…Concerning the coordination polyhedron, both square planar and tetrahedral coordination is reported . From the latter group some exhibit marked contortion, which can be understood as Jahn‐Teller distortion .…”

“…[30] Concerning the coordination polyhedron, both square planar [22,23,[31][32][33][34][35] and tetrahedral coordination is reported. [36][37][38][39][40] From the latter group some exhibit marked contortion, which can be understood as Jahn-Teller distortion. [39,40] Interestingly, in heteroleptic complex units Cu II and thiocyanates can adopt also further coordination possibilities, tetrahedral (N ∧ N)CuNS in [Cu(4-bpy)(SCN)(NCS)] n (bpy = 4,4'-bipyridine) [41] vs. square planar (N ∧ N)CuNN coordination in [Cu(2-bpy)(NCS) 2 ] (2-bpy = 2,2'-bipyridine) [42] or Jahn-Teller distorted octahedral CuS 2 N 2 (N 2 ) in [Cu(NCS)(SCN)(pyrimidine) 2 ] n .…”

Hydrogen-bonded networks based on [M(H2biim)3]2+ anion receptors with chiral recognition guests [M(H2biim)2phen]2+ (H2biim=2,2′-biimidazole, phen=1,10-phenanthroline)

“…Considering our experience metal-H 2 biim complexes [39,51], we want to investigate the role of metal atoms and co-ligands in synthesizing different transition complexes of 2,2 0 -biimidazole, and discuss the influence of the diverse hydrogen bonds in the molecular recognition. So in this work, we design a receptor with H 2 biim using Co(II)/Ni(II)/Zn(II) as a metal glue and 2+ recognize the chirality of the host by H-bonding in complexes 1-3.…”

Structural versatility of six transition metal complexes based on M(II)(2,2′-biimidazole) building blocks and co-ligands

“…In our previous works, we investigated the role of metal atoms in synthesizing different transition complexes of H 2 biim with thiocyanate anion and discuss the role of metal atoms, solvent, counter anion in the crystal-structure formation [12,13]. We focus our attention on metal-H 2 biim complexes with novel structures, aiming to gain insight into the interplay between the counter ions' or ligand's characteristics and the structural diversity observed.…”