title: Bis[trans-di-fluorido-tetra-kis-(pyridine-κN)chromium(III)] sodium tetra-chlorido-zincate perchlorate from synchrotron data.
abstract: The title salt, Na[CrF2(C5H5N)4]2[ZnCl4]ClO4, consists of two cationic Cr(III) complexes, an Na(+) cation, one [ZnCl4](2-) anion and one ClO4 (-) anion. The Cr(III) atoms are coordinated by four pyridine (py) N atoms and two F atoms in a trans arrangement, displaying a distorted octa-hedral geometry. The mean Cr-N(py) and Cr-F bond lengths are 2.086 (8) and 1.864 (14) Å, respectively. The [ZnCl4](2-) anion has a distorted tetra-hedral geometry. The most notable feature of the crystal packing is the formation of weak pyridine-perchlorate C-H⋯O hydrogen bonds, resulting in supra-molecular chains along the b-axis direction. The perchlorate anion was disordered over two sets of sites in a 0.868 (3):0.132 (3) ratio.
authors.affiliation: Pohang Accelerator Laboratory, POSTECH, Pohang 790-784, Republic of Korea.
authors.forename: Dohyun
authors.initials: D
authors.lastname: Moon
authors.affiliation: Department of Chemistry, Andong National University, Andong 760-749, Republic of Korea.
authors.forename: Keon Sang
authors.initials: KS
authors.lastname: Ryoo
authors.affiliation: Department of Chemistry, Andong National University, Andong 760-749, Republic of Korea.
authors.forename: Jong-Ha
authors.initials: JH
authors.lastname: Choi
keywords: crystal structure