Fluorescent copper(I) complexes: structural and spectroscopic characterization of bis(p-toluidine)bis(acetonitrile)tetraiodotetracopper and bis[(p-chloroaniline)(acetonitrile)diiododicopper] tetrameric complexes of mixed-ligand character

Crystal structure of tetra-μ3-iodo-tetrakis[(nicotine)copper(I)], Cu4I4(C10H14N2)4

“…The I−Cu−Ia ngles range from 106.39(4)°to 118.59(4)°are smaller than that in the binuclear compound [Cu2I22-phBim]2.·.THF [6]. The Cu-Cu separations are 2.589(1), 2.628(1), 2.655(4) and 2.780(1) Å,w hich are those found in the similar structurally characterized of Cu4I4L4 (L = Bim) complexes [6]. In addition, the absolut configurations of C6 and N2 can be given as S (S-nicotine was used as astarting material).…”

“…The deviation from tetrahedral geometry is evidenced by the angles ∠N3−Cu1−I1 of 100.5(3)°and ∠I1−Cu1−I2 of 112.91(4)°.Itis worthy to note that Iatom function as abridging ligand connecting three adjacent Cu(I) ions with Cu1-Ib ond distances of 2.679(1) Å to 2.711(1) Å.T hese bond distance is significantly longer than that in CuI, in which, the Cu-Ib ond distance is 2.617.Å [5]. The I−Cu−Ia ngles range from 106.39(4)°to 118.59(4)°are smaller than that in the binuclear compound [Cu2I22-phBim]2.·.THF [6]. The Cu-Cu separations are 2.589(1), 2.628(1), 2.655(4) and 2.780(1) Å,w hich are those found in the similar structurally characterized of Cu4I4L4 (L = Bim) complexes [6].…”

“…Particularly interesting among these are the Cu(I) complexes, since these compounds not only show structure and topological novelty but also are often brightly luminescent even at ambient temperature and with an emissive behavior varying markedly with structure and environment [2][3][4][5]. Numerous clusters of copper(I) iodide with nitrogen donor ligands, have been investigated and structurally characterized [4][5][6][7][8][9][10][11][12]. The cluster compounds [CuIL] 4 ,d isplay ap seudocubic arrangement with metal and halide occupying alternate corners of adistorted cube, the electron-donating ligand occupying the remaining coordination sites of the approximately tetrahedrally coordinated copper atoms and thus projecting along the diagonals of the cube.…”

Copper(I) halide complexation to norbornene: (CuCl)5(norbornene)4: A complex of novel structure

“…Copper(I) halides (halide = iodide, bromide or chloride) have been observed to form neutral complexes of wide variation in structural motif and stoichiometry with Lewis base ligands which bond through donation of an unshared electron pair Stoll, 1978a,b, 1981a,b;Rath et al, 1985Rath et al, , 1986aTompkins et al, 1987;Tompkins, 1988). The solid-state structures of many of these complexes derive from a rhombohedral motif of alternating copper and iodine atoms which exist in isolation or combined by the sharing of edges or faces to form polymeric pleated sheets, chairs, or cubes (Dyason et al, 1985).…”

“…As part of a study of emitting complexes of Cu(I) halides (Rath et al, 1985(Rath et al, , 1986, we have prepared and examined crystalline complexes of CuC1 and CuBr with norbornene using single crystal X-ray diffraction techniques and found the unique complex formed with CuC1 to differ in stoichiometry and structure from the complex formed with cuprous bromide. 2…”