Crystal structure of trans-di-fluoridotetra-kis(pyridine-?N)chromium(III) tri-chlorido-(pyridine-?N)zincate monohydrate from synchrotron data.

ABSTRACT: In the asymmetric unit of the title compound, [CrF2(C5H5N)4][ZnCl3(C5H5N)]·H2O, there are two independent complex cations, one tri-chlorido-(pyridine-?N)zincate anion and one solvent water mol-ecule. The cations lie on inversion centers. The Cr(III) ions are coordinated by four pyridine (py) N atoms in the equatorial plane and two F atoms in a trans axial arrangement, displaying a slightly distorted octa-hedral geometry. The Cr-N(py) bond lengths are in the range 2.0873?(14) to 2.0926?(17)?Å while the Cr-F bond lengths are 1.8609?(10) and 1.8645?(10)?Å. The [ZnCl3(C5H5N)](-) anion has a distorted tetra-hedral geometry. The Cl atoms of the anion were refined as disordered over two sets of sites in a 0.631?(9):0.369?(9) ratio. In the crystal, two anions and two water mol-ecules are linked via O-H?Cl hydrogen bonds, forming centrosymmetric aggregates. In addition, weak C-H?Cl, C-H?? and ?-? stacking inter-actions [centroid-centroid distances = 3.712?(2) and 3.780?(2)Å] link the components of the structure into a three-dimensional network.

SUBMITTER: Moon D 

PROVIDER: S-EPMC4257241 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature