Complexes of copper(II) dihalide with 2,2′-dipyridylamine. X-ray diffraction structures of the [dibromo-bis(dipyam)copper(II)]–water (1:2) and di[chloro-bis(dipyam)copper(II)]diiodide–acetonitrile (1:2) complexes

Synthesis and characterization of copper(II) chelate with a new substituted bis(2-pyridyl)-amine derivative

“…One more water molecule per complex fulfils the formed unit cell. The bond distances and the band angle of Ipdpam as well as the rest coordination distances and angles are similar to those found at other analogous copper complexes [11][12][13][14][15][16][17][18][19][20][21][22][23][24]33]. Figure 1, presents the clinographic projection of title compound with displacement ellipsoids drawn at the 50% probability level, produced with the CAMERON program [34].…”

“…The bis(chelate)copper(II) complexes formulated as Cu(chelate) n XY where n = 1,2 with chelate being 2,2 -bipyridyl (bipy) and/or 1,10-phenanthroline (phen) and X, Y various counter anions, coordinated or not, are known to display a large variation of non-regular stereochemistry [1,2], presenting a large number of investigated structural data [3][4][5][6][7][8][9][10]. When the coordinated ligand is the more flexible bis(2-pyridyl)amine (dpam), structural data are more limited [11][12][13][14][15][16][17][18][19][20][21][22][23]. In the case where X and Y together represent a divalent oxyanion like CO 3 2− or SO 4 2− five classes of local molecular structures are involved: the monomeric distorted square pyramid with unidentate oxyanions, the monomeric distorted square pyramid with bidentate oxyanions, the dimeric distorted square pyramid with double bridges of tridentate oxyanions, the polymeric distorted octahedron with bidentate bridging oxyanions and the polymeric distorted square pyramid with tridentate bridging oxyanions [24][25][26][27][28][29].…”

Stabilization of CuII–I Bonds Using 2‐Benzoylpyridine Thiosemicarbazones – Synthesis, Structure, Spectroscopy, Fluo­rescence, and Cyclic Voltammetry

“…[10] A N 3 Cu II -I 2 core with one terminal and one bridging iodido ligand was also stabilized by 1,10-phenanthroline. [11] Likewise, other metal cores such as N 3 ClCu II -I (five-coordinate), N 3 Cu II -I (four-coordinate), and N 3 CCu II -I (five-coordinate) have been stabilized by 2,4,6-tri(2-pyridyl)-1,3,5-triazine, [12] bis(2-pyridylcarbonyl)-amine, [12] and tris(2-pyridylthio)methyl ligands, [13] respectively.…”

“…[14,15] Furthermore, the solvent also played an important role in changing the stoichiometry of the resulting complexes. In a typical reaction, copper(I) iodide with HL 1 in an acetonitrile/chloroform mixture (2:1 v/v) in the presence of PPh 3 (1 or 2 mol) formed the iodido-bridged dimeric complex [Cu 2 (μ-I) 2 2 ], [16] unlike the mononuclear complex [Cu I I(HL 1 )(PPh 3 ) 2 ] formed in acetonitrile. [14] Similarly, the mononuclear complex [ 4 ]} n formed in an acetonitrile/chloroform mixture.…”

Coordination geometry in bis(di-2-pyridylamine)copper(II) complexes. Crystal structures and spectroscopic properties of [Cu(L)2(NCS)2][Cu(L)2(NCS)]X, X= , I−

“…The complexes Cu(chelate) 2 X 2 or Cu(chelate) 2 XY (chelate ¼ 2,2 0 -bipyridyl (bpy) or 1,10-phenanthroline (phen); X, Y ¼ various anions, coordinated or not) exemplify this [1,2] and much structural data are available [3][4][5][6][7][8]; structural data are more limited for corresponding complexes containing the more flexible ligand di-2-pyridylamine (dpyam) [5,[9][10][11][12][13][14][15][16][17]. The coordination geometry in the five-coordinate complexes [Cu(chelate) 2 X]Y (chelate ¼ bpy or phen) tends to be nearly regular trigonal bipyramidal with slight distortion towards square pyramidal ( > 0.5), e.g., [Cu(bpy) 2 (NCS)](NO 3 ) ( ¼ 0.89) [18], [Cu(bpy) 2 (NCS)](NCS) ( ¼ 0.65) [19], [Cu(bpy) 2 (NCS)](BF 4 ) ( ¼ 0.61) [20], [Cu(bpy) 2 (NH 3 )](BF 4 ) 2 ( ¼ 0.77) [21] and [Cu(phen) 2 (NCS)](ClO 4 ) ( ¼ 0.81) [7].…”