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Jeyaseelan S.,St Philomenas College Autonomous | Sowmya B.R.,Tumkur University | Venkateshappa G.,Tumkur University | Raghavendra Kumar P.,Tumkur University | And 2 more authors.
Acta Crystallographica Section E: Structure Reports Online | Year: 2015

In the title compound, C16H17NO2S, the heterocyclic ring adopts a half-chair conformation and the bond-angle sum at the N atom is 354.6°. The dihedral angle between the planes of the aromatic rings is 74.15 (10)°. In the crystal, molecules are linked by weak C - H⋯O hydrogen bonds, generating C(8) and C(4) chains propagating along [100] and [010], respectively, which together generate (001) sheets.


Jeyaseelan S.,St Philomenas College Autonomous | Nagendra Babu S.L.,Tumkur University | Venkateshappa G.,Tumkur University | Raghavendra Kumar P.,Tumkur University | And 2 more authors.
Acta Crystallographica Section E: Structure Reports Online | Year: 2015

In the title compound, C10H13NO2S, the heterocyclic ring adopts a half-chair conformation and the bond-angle sum at the N atom is 347.9°. In the crystal, inversion dimers linked by pairs of C - H⋯O hydrogen bonds generate R 22(8) loops.


Jeyaseelan S.,St Philomenas College Autonomous | Asha K.V.,Tumkur University | Venkateshappa G.,Tumkur University | Raghavendrakumar P.,Tumkur University | Palakshamurthy B.S.,Tumkur University
Acta Crystallographica Section E: Structure Reports Online | Year: 2014

In the title compound, C16H17NO2S, the heterocyclic ring adopts a half-chair conformation and the bond-angle sum at the N atom is 350.2°. The dihedral angle between the planes of the aromatic rings is 47.74 (10)°. In the crystal, molecules are linked by C - H⋯O hydrogen bonds to generate [010] chains.


Anitha B.R.,University of Mysore | Gunaseelan A.T.,St Philomenas College Autonomous | Vinduvahini M.,Sri D Devaraja Urs Government First Grade College | Kavitha H.D.,Government Science College | Devarajegowda H.C.,University of Mysore
Acta Crystallographica Section E: Crystallographic Communications | Year: 2015

In the title compound, C15H14FNO3S2, the 2H-chromene ring system is close to being planar (r.m.s. deviation = 0.024Å) and the morpholine ring adopts a chair conformation. The dihedral angle between the 2H-chromene ring system and the morpholine ring (all atoms) is 88.21(11)°. In the crystal, inversion dimers linked by pairs of very weak C - H⋯F hydrogen bonds generate R 2 2(8) loops; C - H⋯O hydrogen bonds connect the dimers into [010] chains. Weak aromatic π-π stacking interactions between the pyran rings of the chromene systems [centroid-centroid distance = 3.6940(16)Å] are also observed.


Jeyaseelan S.,University of Mysore | Devarajegowda H.C.,University of Mysore | Sathishkumar R.,Indian Institute of Science | D'Souza A.S.,St Philomenas College Autonomous | D'Souza A.,St Philomenas College Autonomous
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

In the title compound, C12H11FN4S, the thiadiazine ring adopts a twist-boat conformation. The dihedral angle between the triazolothiadiazine system and the benzene ring is 10.54 (9)°. The crystal structure is characterized by C - H⋯N hydrogen bonds. The crystal packing also exhibits π-π interactions, with a centroid-centroid distance of 3.6348 (15) Å.

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