title: Oxymatrinium tetra-chloridoferrate(III).
abstract: The asymmetric unit of the title compound, (C(15)H(25)N(2)O(2))[FeCl(4)], contains a tetra-chloridoferrate(III) anion and a oxymatrinium cation [oxymatrine is (4R,7aS,13aR,13bR,13cS)-dodeca-hydro-1H,5H,10H-dipyrido[2,1-f:3',2',1'-ij][1,6]naphthyridin-10-one 4-oxide]. The conformation of oxymatrine is similar to that of matrine with one ring having a half-chair conformation, while the others have chair conformations. Chiral chains of cations along the c axis are formed by O-H⋯O hydrogen bonds.
authors.affiliation: School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510000,  People's Republic of China.
authors.forename: Xiong
authors.initials: X
authors.lastname: He
authors.forename: Xing Chuan
authors.initials: XC
authors.lastname: Wei
authors.forename: Yu Chang
authors.initials: YC
authors.lastname: Tian
authors.forename: Jia Xiong
authors.initials: JX
authors.lastname: Lai