title: Crystal structure of ethyl 4-(2-chloro-phen-yl)-2-methyl-4H-pyrimido[2,1-b][1,3]benzo-thia-zole-3-carboxyl-ate.
abstract: In the title compound, C20H17ClN2O2S, the dihedral angle between the planes of the benzo-thia-zole fused ring system (r.m.s. deviation = 0.024 Å) and the chloro-benzene ring is 89.62 (12)°. The ester C-O-C-C side chain has an anti orientation [torsion angle = -155.2 (3)°]. In the crystal, weak aromatic π-π stacking inter-actions are observed between the phenyl and pyrimidine rings [centroid-centroid seperation = 3.666 (2) Å].
authors.affiliation: Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Balbir
authors.initials: B
authors.lastname: Kumar
authors.affiliation: Department of Chemistry, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Manmeet
authors.initials: M
authors.lastname: Kour
authors.affiliation: Department of Chemistry, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Satya
authors.initials: S
authors.lastname: Paul
authors.affiliation: Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Rajni
authors.initials: R
authors.lastname: Kant
authors.affiliation: Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180 006, India.
authors.forename: Vivek K
authors.initials: VK
authors.lastname: Gupta
keywords: biological activity; crystal structure; ester; pyrimido[2,1-b][1,3]benzo­thia­zole