Double Hydrogen Bond- and π−π-Stacking-Assembled Two-Dimensional Copper(I) Complex of 2-Hydroxyquinoxaline

Structurally Characterized Coinage‐Metal–Ethylene Complexes

“…Munakata et al also described the synthesis of a cationic copper-ethylene complex obtained by using 2-hydroxyquinoxaline as the supporting ligand. [113] [Cu(Hhq) 2 -(C 2 H 4 )]ClO 4 ( Figure 12) aggregates in the solid state as a result of intermolecular hydrogen bonds and π-π stacking. Suenaga and Munakata et al [114] have isolated a fairly simple, cationic copper-ethylene complex by using tetraethylenediamine.…”

Thermally Stable Gold(I) Ethylene Adducts: [(HB{3,5‐(CF3)2Pz}3)Au(CH2CH2)] and [(HB{3‐(CF3),5‐(Ph)Pz}3)Au(CH2CH2)]

“…For example, Thompson et al in 1983 [7] and our group in 1997 [8] reported the first crystal-structural data on the ethylene adducts of copper(I) and silver(I), respectively. Since then, several copper(I) ethylene complexes [9][10][11][12][13][14][15][16][17][18] and a few well authenticated silver(I) ethylene adducts [19][20][21][22][23] have been described. However with gold(I), even complexes of substituted olefins are quite limited, and structurally characterized ethylene adducts are unknown.…”

Novel CuI Ethylene Complexes with 6,6′‐Diphenyl‐4,4′‐bipyrimidine Three‐Dimensionally Self‐Assembled by an Intermolecular π‐π Stacking Interaction and a C–H···N Contact

“…In alkene or alkyne π-bonded Cu I complexes, in-plane coordination of a C=C or CϵC bond to trigonal planar Cu I centers often leads to planar molecular conformations. [5,6,9,44,45] For instance, the infinite π-π stacking columns are confirmed in 2,2Ј-bipyridine complex [Cu(2,2Ј-bpy)(CH 2 = CH 2 )]ClO 4 [6] and 1,10-phenanthroline complex [Cu(1,10-phen)(CHϵCCO 2 Et)]ClO 4 [45] with the nearest carbon-tocarbon distances of 3.31 and 3.37 Å, respectively, while dimer formation through π-π stacking interaction can be seen in a Cu I -alkyne complex [Cu(1,10-phen)(CHϵCH)]-ClO 4 [45] (the nearest carbon-to-carbon distances being 3.42 Å).…”