title: trans-Di-fluorido-tetra-kis-(pyridine-κN)chromium(III) perchlorate from synchrotron radiation.
abstract: The are two independent complex cations in the title salt, [CrF2(C5H5N)4]ClO4, each located on a centre of inversion, as well as an independent perchlorate counter-ion. The complex cations adopt slightly distorted octa-hedral coordination environments around the Cr(III) ion, defined by four pyridine (py) N atoms in the equatorial plane and two F(-) ligands in the axial positions; intra-molecular C-H⋯F contacts are noted. The mean Cr-N(py) and Cr-F bond lengths are 2.088 (6) and 1.8559 (10) Å, respectively. The three-dimensional architecture is sustained by hydrogen bonds involving the pyridine C-H groups as donors, and F and O atoms as acceptors.
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: Jong-Ha
authors.initials: JH
authors.lastname: Choi