The crystal structures of mixed-ligand copper(II) complexes. I. Bis(3-aminopropyl)amine(di-2-pyridylamine)copper(II) nitrate and bis(3-aminopropyl)amine(2,2'-bipyridyl)copper(II) nitrate

Abstract

3224THE CRYSTAL AND MOLECULAR STRUCTURE OF C35H4sO 5 clustered, the trend of a decreasing C-O bond length with decreasing bridge angle is clearly evident.A packing diagram is shown in Fig. 6. In general the long direction of the molecules lies perpendicular to the b axis with the longest dimension of the molecules lying along the diagonal of the ac plane. No unusual intermolecular contacts were observed. The

catena-Acetato(di-2-pyridylamine)-μ-perchlorato-copper(II) monohydrate

“…The Cu atom lies above this plane, 0.056 A towards 0(3) and the tetrahedral twist results in non-linear angles at Cu" N(1)-Cu-O(1) 165.3 ° and N(2)-Cu-O(2) 161.8 ° . There are no unusual bond lengths or angles in the dpyam ligand (Ray & Hathaway, 1978). The separate pyridine rings are planar (Table 3) and inclined to each other at an angle of 12.8 ° .…”

Cation distortion isomerism in three five-co-ordinate diethylenetriamine(di-2-pyridylamine)copper(II) complexes

“…In (l), (2), and (3) there are significant differences in the angular distortion of the N(1)-Cu-N(3)(a3) and N( 2)-Cu-N(4) (a4) angles of the CuN, chromophore, the former decreases l59.0(5), 151.9(1), and 137.2(1)" and the latter increases, 162. 6(5), 167.8(1), and 170.7(1 The angle of twist between pyridine rings of bipyam, bipy, and phen ligands, the N(4)-N(5) bite distances, and Cu-N(5)…”

“…The dien ligand 2o in (1) and ( 2) bonds with a symmetrical k'k' conformation, but unsymmetrically in (3), Figure 3. The individual pyridine rings of the bipyam ligands are reasonably planar, Table 4, however the pairs of rings are not coplanar, but inclined at angles of 10.5, 14.7, and 12.6" in ( l ) , (2) and (3) respectively, Table 5. The CuN, chromophores involve four almost equivalent in-plane Cu-N distances, mean 2.00 A, and a slightly longer Cu-N(5) bond distance, 2.125(13) A in (l), 2.142(5) A in (3), and 2.169(5) A in ( Z ) , out-of-plane distances, which are comparable, Table 5, 20) A.…”

“…(1) the CuN, chromophore stereochemistry is the most regular square pyramidal, while in ( 2) and (3) there is an increasing angular distortion towards a trigonal-bipyramidal stereochemistry, with the N( 2 The forms of the Berry twist from a squarewhich can account for the observed differences in the a, values of (1), (2), and (3).…”

“…This term can be extended to apply to cation or anion distortion isomers and the present paper reports the crystal structure of three cation distortion isomers of the [Cu(dien) (bipyam)12+ cation [dien = diethylenetriamine or bis(2-aminoethy1)amirie and bipyam = di-2-pyridylamine] as its C1,* 2H,O, [ClO,],*H,O, and [NO,], salts, along with their electronic and magnetic properties. Crystal Data.-The crystal and refinement data for ( l ) , (2), and (3) are summarised in Table 1 ; for all three complexes the preliminary unit-cell data were determined from precession photographs and for (2) and (3) refined on a Philips PW 1 100 four-circle diffractometer. The intensities for (1) were collected photographically by the equiinclination Weissenberg technique using five-film packs and estimated by the S.R.C.…”