π-Stacking motifs in the crystal structures of bis(phosphine) copper(I) η2-tetrahydroborate complexes

Synthesis and crystal structure of a novel prochiral ketoimine: (E)-acetophenoneO-diphenylphosphoryl oxime

“…The molecular packing of (I) is such that phosphoryl atom O2 is on the same side of the molecule as the imine N atom, with an N1-O1-P1-O2 torsion angle of 63.26 (10) . This -stacking is characterized by a centroid-to-centroid distance of 3.9530 (10) Å , a plane-to-centroid distance of 3.9471 (6) Å , and a ring offset or ring-slippage distance of 0.216 (3) Å (Hunter & Saunders, 1990;Lueckheide et al, 2013). Phosphoryl atom O2 forms two weak long C-HÁ Á ÁO interactions (Table 2 and Fig.…”

“…The molecules pack together in the solid state with few strong intermolecular interactions, such that the packing is likely driven to best fit the molecular shape of the molecule. There also exist edge-to-face -stacking interactions (Nishio et al, 2009;Lueckheide et al, 2013) of each of the parallel -stacked rings with the other diphenylphosphoryl ring on the neighboring molecule at (Àx + 2, Ày + 1, Àz + 1), characterized by centroid-to-centroid distances of 4.8226 (11) Å (Fig. 2) running parallel to the crystallograhpic b axis, and there are several aromatic -stacking interactions.…”

Structural studies of diaminocyclohexane-containing aza-crown ether macrocycles and their Zn(II) complexes

“…Crystals of the complex (R)-2:ZnCl 2 were obtained by slow evaporation from d 4 -methanol and characterized by X-ray crystallography. The asymmetric unit contains two crystallographically independent molecules of (R)-2:ZnCl 2 that pack into the crystal through off-set intermolecular face-to-face π-stacking between phenylene rings [44] (plane-to-plane angles 8.03 (9) ion, which provides an explanation for the large 1 H NMR shift observed upon coordination. Fig.…”

Crystal structure of 4-chloro-2-iodoaniline

“…For the crystal structures of related monohalogenated anilines, see: Trotter et al (1966); Parkin et al (2005) and of dihalogenated anilines, see: Xu et al (2008). For halogen-halogen interactions, see: Pedireddi et al (1994) and for -stacking, see: Lueckheide et al (2013). For van der Waals radii, see: Bondi (1964 Hydrogen-bond geometry (Å , ).…”

“…The parallel planes of neigboring aromatic molecules reveal a highly offset face-to-face π-stacking (Fig. 3) characterized by a ring centroidto-centroid distance of 4.154 (1) Å, centroid-to-plane distance of 3.553 (3) Å, and ring-offset slippage parameter of 2.151 (6) Å (Lueckheide et al, 2013).…”