Caesium bis(5-bromosalicylaldehyde thiosemicarbazonato-κ3O,N,S)ferrate(III): supramolecular arrangement of low-spin FeIII complex anions mediated by Cs+ cations.
The synthesis and crystal structure determination (at 293 K) of the title complex, Cs[Fe(C(8)H(6)BrN(3)OS)(2)], are reported. The compound is composed of two dianionic O,N,S-tridentate 5-bromosalicylaldehyde thiosemicarbazonate(2-) ligands coordinated to an Fe(III) cation, displaying a distorted octahedral geometry. The ligands are orientated in two perpendicular planes, with the O- and S-donor atoms in cis positions and the N-donor atoms in trans positions. The complex displays intermolecular N-H...O and N-H...Br hydrogen bonds, creating R4(4)(18) rings, which link the Fe(III) units in the a and b directions. The Fe(III) cation is in the low-spin state at 293 K.
School of Engineering and Applied Sciences, Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham B4 7ET, England.
Robyn Elizabeth
RE
Powell
School of Life and Health Sciences, Aston University, Aston Triangle, Birmingham B4 7ET, England.
Carl H
CH
Schwalbe
National Crystallography Service, Department of Chemistry, University of Southampton, Southampton SO17 1BJ, England.
Graham J
GJ
Tizzard
School of Engineering and Applied Sciences, Chemical Engineering and Applied Chemistry, Aston University, Aston Triangle, Birmingham B4 7ET, England.
Petra J van
PJ
Koningsbruggen
FeIII coordination compound; caesium salt; crystal structure; low-spin state FeIII; salicylaldehyde thiosemicarbazone; spin-crossover behaviour