Bis(2-hy-droxy-2,3-di-hydro-1 H -inden-1-aminium) tetra-chlorido-palladate(II) hemihydrate.

A new square-planar palladium complex salt hydrate, (C 9 H 12 NO) 2 [PdCl 4 ]·0.5H 2 O, has been characterized. The asymmetric unit of the complex salt comprises two [PdCl 4 ] 2- dianions, four 2-hy-droxy-2,3-di-hydro-1 H -inden-1-aminium cations, each derived from (1 R ,2 S )-(+)-1-amino-indan-2-ol, and one water mol-ecule of crystallization. In the crystal, a two-dimensional layer parallel to (001) features a number of O-H⋯O, N-H⋯O, O-H⋯Cl and N-H⋯Cl hydrogen bonds.