The electronic properties of monohalogenobisbipyridyl copper(II) complexes

The structures of bis(2,2'-bipyridyl)monoiodocopper(II) perchlorate and bis(2,2'-bipyridyl)monobromocopper(II) tetrafluoroborate

“…(I) was prepared as previously reported (Harris, Lockyer & Waterman, 1961;Elliott, Hathaway & Slade, 1966) …”

“…Owing to the presence of the heavy I atom and the use of visually estimated data the final R (0.09) was relatively high and the Cu-N distances, 1.96-2.10 A, were not considered significantly different. As the electronic spectra of a series of [Cu-(bpy)2X] cations, where X --CI-, Br-and I- (Elliott, Hathaway & Slade, 1966), show splittings from 0.0-3.8 × 103 cm -1 the crystal structures of [Cu(bpy)2I]-C10 4 (I) and [Cu(bpy)2Br]BF 4 (II) have been determined to establish a correlation between the electronic spectra and the structural distortions of the [Cu-(bpy) 2 X ] + cation.…”

The structures of bis(2,2'-bipyridyl)mononitritocopper(II) tetrafluoroborate and bis(2,2'-bipyridyl)mononitritozinc(II) nitrate

“…3a) can take the two alternative routes (A) and (B), related by the mechanistic pathway of the Berry (1960) twist, both of which result in a square-pyramidal distortion but with elongation in two different directions, due to the presence of non-equivalent ligands, namely, the Cu-L and Cu-N(4) directions. These differences have been illustrated for a series of cation distortion isomers (Ray, Hulett, Sheahan & Hathaway, 1978), where L = C1 (EUiott, Hathaway & Slade, 1966;Kennedy, Ray, Sheahan, Power & Hathaway, 1980) and L = H20 (Harrison, Hathaway & Kennedy, 1979;. Comparable modes of distortion of the [Cu(bpy)2(OXO)] Y system can also be suggested (Fig.…”

The crystal structure determinations of 2,2'bipyridylamine and three copper (II) complexes with 2,2'bipyridylamine

“….8573 (12) .1409 (11) .4997 (7) S (2) .8698 (8) .6889 (6) • 3319 (4) 0 (1) .53 82 (21) • 3669 (19) • 3527 (13) 7.4 (6) 0 (2) • 3671 (21) .3886 (17) • 3698 (12) 7.0 (6) 0(3) .4501 (26) .4637 (22) .2803 (18) 11.4 (9) 0(4) .4789 (25) • 5075 (24) • 3978 (16) 11.0 (9) N(l) .4349 (18) .0408 (16) • 4048 (11) 3.4 (5) N (2) .4740 (18) .1958 (15) .4288(12) 3.3 (5) N(3) .4504 (17) • 1234 (15) .5346(11) 3.0(5) N(4) .6707 (22) .0663 (19) .4671 (14) 6.0 (7) N(5) .0271 (16) .3774 (14) .2709(10) 2.3 (4) N (6) .8857 (17) .3 553 (15) .1793(11) 2.8 (5) N (7) .8289 (17) .2879 (14) .2821 (12) 3.1 …”