Supramolecular structures of 1-phenylethylammonium tartrates

The structures of six 1-phenylethylammonium tartrates have been determined and in each of them a distinctive hydrogen-bonded anion substructure can be identified. (S)-1-Phenylethylammonium ( R,R)-hydrogen tartrate [(I), P2(1), Z' = 1] contains anion sheets built from a single type of R-4(4)(22) ring with cations pendent, via three N - H ... O hydrogen bonds, from just one face of the sheet. ( S)-1-Phenylethylammonium rac-hydrogen tartrate [(II), P2(1), Z' = 2] and its enantiomorph (R)-1-phenylethylammonium rac-hydrogen tartrate [(III), P2(1), Z' = 2] contain anion sheets built from four types of ring, R-2(2)(10), R-2(2)(12), R-2(4)(14) and R-4(4)(20), and there are cations pendent from both faces of the sheet. The anion substructure in bis[(S)-1-phenylethylammonium] (R, R)-tartrate [(IV), P2(1), Z' = 1] consists of simple C( 5) chains, which are linked into sheets by the cations, while in bis(rac-1-phenylethylammonium) (R, R)-tartrate [(V), P2(1), Z' = 2] there are anion sheets containing two distinct types of R-4(4)(22) ring, with equal numbers of ( R) and ( S) cations pendent from each face of the anion sheet. Bis[(R)-1-phenylethylammonium] rac-tartrate methanol hemisolvate [(VI), P1, Z' = 4, with 14 independent components in the asymmetric unit] contains anion sheets built from two types of R-2(2)(12) ring and two types of R-6(6)(32) ring; half of the cations and half of the methanol molecules are pendent from each face of the sheet.