title: Crystal structure of (2S,4S)-5,5-dimethyl-2-(pyridin-2-yl)-1,3-thia-zolidine-4-carb-oxy-lic acid.
abstract: In the title compound, C11H14N2O2S, the thia-zolidine ring has an envelope conformation with the C atom bonded to the carb-oxy-lic acid group at the flap. Two C atoms of the thia-zolidine ring adopt S conformations. In the crystal, O-H⋯N hydrogen bonds between the amine and carb-oxy-lic acid groups construct a helical chain structure along the a-axis direction. The chains are further connected via weak C-H⋯π contacts, forming a layer parallel to the ac plane.
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Payel
authors.initials: P
authors.lastname: Laskar
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Naoto
authors.initials: N
authors.lastname: Kuwamura
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Nobuto
authors.initials: N
authors.lastname: Yoshinari
authors.affiliation: Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan ; CREST, Japan Science and Technology Agency, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Konno
keywords: C—H⋯π contacts; crystal structure; hydrogen bonding; thia­zolidine