6533b861fe1ef96bd12c4206

RESEARCH PRODUCT

The Nonanuclear [Mo(IV) {(CN)Fe(III)(3-ethoxy-saldptn)}8]Cl4 Complex Compound Exhibits Multiple Spin Transitions Observed by Mössbauer Spectroscopy

P. KerepFranz Renz

subject

chemistry.chemical_compoundCrystallographySchiff basechemistryAtomic electron transitionLigandMössbauer spectroscopyInorganic chemistryCluster (physics)Alkoxy groupMossbauer spectraSpin (physics)

description

The pentadentate ligand 3-EO-5LH2 = 3-ethoxy-saldptn = N,N′-bis(3-ethoxy-1-hydroxy-2-benzyliden)-1,7-diamino-4-azaheptane has been prepared by a Schiff base condensation between 1,7-diamino-4-azaheptane and the corresponding 3-ethoxy-salicyaldehyde. 3-EO-5LH2 is a sterical extention to 5LH2. Its complexation with Fe(III) gave the high-spin (S = 5/2) complex of [Fe(III)(3-EO-5L)Cl]. This precursor was combined with [Mo(CN)8]4− and a blue nonanuclear cluster [Mo(IV){(CN)Fe(III)(3-EO-5L)}8]Cl4 resulted. This starshaped nonanuclear compound is a high-spin system at room temperature. On cooling to 10 K some of the eight iron(III) centers switched to the low-spin state as proven by Mossbauer spectra, i.e. multiple electronic transitions.

yearjournalcountryeditionlanguage
2004-01-01
https://doi.org/10.1007/978-1-4020-2852-6_57