Copper(II) adducts with N,N,N′,N′-tetramethylethane-1,2-diamine and attempts to prepare trinuclear derivatives

catena-Poly[[dianilinedichloridocopper(II)]-μ2-2,5-bis(4-pyridyl)-1,3,4-oxadiazole]

“…1, each Cu coordinates with four N atoms from two anilines and two 2,5-bis(4-pyridyl)-1,3,4-oxadiazole ligands, and two Cl atoms lying above and below the plane formed by the N atoms around Cu interact with Cu atom to form an octahedral geometry. The Cu-Cl bonds (2.7870 (7) Å) are longer than normal value (Handley et al, 2001). 2,5-Bis(4-pyridyl)-1,3,4-oxadiazoles act as bridging ligands to connect adjacent two Cu atoms to construct a (Table 1).…”

“…Unsymmetric organic bridging ligands can play different roles in the construction of metal-organic frameworks, see: Du et al (2004); Dong et al (2005). For Cu-Cl distances, see: Handley et al (2001).…”

The First Open‐Paddlewheel Structures in Diruthenium Chemistry: Examples of Intermediate Magnetic Behaviour between Low and High Spin in Ru25+ Species

“…[18] The distances Cu À F in those examples are very long (2.502(5)-2.693(2) ) and, therefore, the BF 4 À groups are considered as semicoordinated. However, in complex 4·THF the RuÀF bond lengths are very short (2.069(11) and 2.099 (12) ) and comparable to the length found in several ruthenium complexes in which the fluoride is a terminal ligand: 2.069(2) in [RuF(CO)A C H T U N G T R E N N U N G (dppp) 2 ]PF 6 , 2.069(3) and 2.056(3) in [Ru 2 F 2 A C H T U N G T R E N N U N G (dppp) 2 ] (dppp = 1,3-bis(diphenylphosphino)propane), [19] or 2.065 (1) …”

Metal backbone polymers [M(isn-κNpy)4(μ-SiF6-κF,F′)]n (M=Cu, Co, Ni; isn=isonicotinamide) containing an unusual hexafluoridosilicato bridge

“…On the other hand while halides (Cl À , Br À , I À ) [6][7][8] alkoxides [9], cyanides [10] and azide [11] are commonly used as small bridging ligands for building up poly-nuclear compounds, coordination complexes with F À as bridge are much more rare [12][13][14][15]. A few examples were reported such as, [Cu 2 F 2 (mppzH) 4 ](BF 4 ) 2 [12] and [Cu 2 F 2 (tmpz) 6 ](BF 4 ) 2 [13] (mmpzH = 2-methyl-5-phenyalpyrazole, tmpz = 3,4,5-trimethylpyrazole) where two Cu(mppzH) 2 or Cu(tmpz) 3 units are connected by bis-l-F bridges.…”