8-Quinolyl 3-nitrobenzenesulfonate

Abstract

The structure of the two independent molecules of (I), showing 50% probability displacement ellipsoids. organic papers o1380 Nagarajan Vembu et al. C 15 H 10 N 2 O 5 S

Layer architecture in 4-nitrophenyl and 4-chlorophenyl 3-nitrobenzenesulfonate at 100 K

“…The dihedral angles between the two aromatic planes are 57.7 (7) and 51.0 (2) in (I) and (II), respectively. This is similar to the situation reported for other aromatic sulfonates (Vembu et al, 2004a,b), but is in contrast with the near coplanar orientation found in 2,4-dinitrophenyl 4-toluenesulfonate , 4-methoxyphenyl 4-toluenesulfonate (Vembu, Nallu, Garrison, Hindi & Youngs, 2003) and 8-quinolyl 3-nitrobenzenesulfonate (Vembu, Nallu, Spencer & Howard, 2003). This difference arises from the synclinal C1ÐSÐO5ÐC7 torsion angles in (I) and (II) [À62.6 (3) and 68.9 (4) , respectively], as distinct from the antiperiplanar/anticlinal arrangement, e.g.…”

4-tert-Butylphenyl 4-methylbenzenesulfonate

“…The dihedral angle between the planes of the two aromatic rings is 66.5 (1) . These rings have a non-coplanar orientation, similar to that reported for other aromatic sulfonates (Vembu et al, 2004a,b) and in contrast to the near-coplanar orientation found in 4-methoxyphenyl 4-toluenesulfonate (Vembu, Nallu, Garrison, Hindi & Youngs, 2003), 2,4-dinitrophenyl 4toluenesulfonate and 8-quinolyl 3-nitrobenzenesulfonate (Vembu, Nallu, Spencer & Howard, 2003).…”

Phenylamino (diphenyl)phosphine selenide: supramolecular aggregation via weak N-H…Se, C-H…π and π…π interactions

“…Planar configuration substituents around N atom are also found in 4-dimethylaminopyridinium. 17 The valence angle P1-N1-H1 (118(2)º) is close to the one observed in bis(2,6-diphenylphosphino)picolinamide diselenide (120(5)º), but not the symmetrical pPh 2 P(Se)NHCH 2 (C 6 H 4 ) CH 2 NHP-(Se)Ph 2 where the valence angle is significantly lower (110(3)º). The P1-C31 and P1-C21 bond lengths are 1.804(3) Å and 1.808(4) Å, respectively, and are lower than the reported for both P,P'-imino bis(diphenylselenophosphine) tetrahydrofuran solvate 7 and 1,4-butylene bis(diphenylphosphine selenide).…”

“…20 The geometric parameters agree very well with those found in benzene 1,3,5-tris(p-toluenesulfonate) (H … Cg 2.98 , C … Cg 3.728 , C-H … π 142º). 17 The supramolecular aggregation is completed by the presence the π … π weak interactions, with a Cg3-Cg2 distance of 5.506Å, stacking the layers in the crystal lattice.…”