Crystal structure of trans-di-chlorido-(1,4,8,11-tetra-aza-undecane-?(4) N)chromium(III) perchlorate determined from synchrotron data.

ABSTRACT: The structure of the title complex, [CrCl2(2,3,2-tet)]ClO4 (2,3,2-tet is 1,4,8,11-tetra-aza-undecane, C7H20N4), has been determined from synchrotron data. The Cr(III) ion is coordinated by the four N atoms of the 1,4,8,11-tetra-aza-undecane ligand in the equatorial plane and two chloride ions in an axial arrangement, displaying a slightly distorted octa-hedral coordination environment. The two H atoms of the secondary amines are grouped on the same side of the equatorial N4 plane (meso-RS conformation). The Cr-N bond lengths range from 2.069?(2) to 2.084?(2)?Å, while the mean Cr-Cl bond length is 2.325?(2)?Å. The crystal structure is stabilized by inter-molecular hydrogen-bonding inter-actions between the primary and secondary amine groups of the 2,3,2-tet ligands, the Cl ligands and the O atoms of the perchlorate counter-anion, forming corrugated layers parallel to (010).

SUBMITTER: Moon D 

PROVIDER: S-EPMC4778838 | biostudies-other | 2016 Mar

REPOSITORIES: biostudies-other