Oligonuclear Fe complexes (Fe, Fe4, Fe6, Fe9) derived from tritopic pyridine bis-hydrazone ligands-structural, magnetic, and Mössbauer studies.
Tri-topic pyridine bis-hydrazone ligands produce polynuclear complexes with Fe(II) and Fe(III) salts with varying nuclearity and metal ion oxidation states. Mononuclear, tetranuclear, hexanuclear, and nonanuclear examples are discussed using structural, magnetic and Mössbauer data. In one case, although X-ray data suggest a [3 × 3] Fe9 grid (space group P42/n), careful examination of the structure, in conjunction with magnetic and Mössbauer data, indicates an unusual situation where the corner and center sites are present at unit occupancy, whereas side site occupancy is ∼0.6.
Department of Chemistry, Memorial University , St. John's, Newfoundland A1B3X7, Canada.
Muhammad U
MU
Anwar
Louise N
LN
Dawe
Stewart R
SR
Parsons
Santokh S
SS
Tandon
Laurence K
LK
Thompson
Subrata K
SK
Dey
Valeriu
V
Mereacre
William M
WM
Reiff
Scott D
SD
Bunge