title: Crystal structure of morpholin-4-ium cinnamate.
abstract: In the anhydrous salt formed from the reaction of morpholine with cinnamic acid, C4H10NO(+)·C9H7O2 (-), the acid side chain in the trans-cinnamate anion is significantly rotated out of the benzene plane [C-C-C- C torsion angle = 158.54 (17)°]. In the crystal, one of the the aminium H atoms is involved in an asymmetric three-centre cation-anion N-H⋯(O,O') R 1 (2)(4) hydrogen-bonding inter-action with the two carboxyl-ate O-atom acceptors of the anion. The second aminium-H atom forms an inter-species N-H⋯Ocarboxyl-ate hydrogen bond. The result of the hydrogen bonding is the formation of a chain structure extending along [100]. Chains are linked by C-H⋯O inter-actions, forming a supra-molecular layer parallel to (01-1).
authors.affiliation: Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.
authors.forename: Graham
authors.initials: G
authors.lastname: Smith
keywords: cinnamate; crystal structure; hydrogen bonding; morpholinium; salt