In:
Bulletin of the Chemical Society of Japan, Oxford University Press (OUP), Vol. 74, No. 12 ( 2001-12-01), p. 2361-2368
Abstract:
Binuclear iron(III) spin-crossover complexes with salten ligand [Fe2(salten)2(L)](BPh4)2 were synthesized and characterized by single-crystal X-ray diffraction, Mössbauer spectra, magnetic susceptibilities and electronic spectra, where H2salten is a pentadentate ligand derived from salicylaldehyde and 3,3′-diaminodipropylamine and L is a didentate axial ligand (az = azobis(4-pyridine) and cc = 4,4′-vinylenebis(pyridine)). The structures of [Fe2(salten)2(az)] (BPh4)2 (1) and [Fe2(salten)2(cc)](BPh4)2 (2) were determined at both 100 K and 298 K. Crystal data for 1 at 100 K: C98H94O4N10B2Fe2, monoclinic, space group P21/c, Z = 2, a = 15.986(2) Å, b = 15.825(2) Å, c = 16.441(2) Å, β = 107.902(2)°, V = 3957.8(8) Å3. Crystal data for 2 at 100 K: C100H96O4N8B2Fe2, monoclinic, space group P21/a, Z = 2, a = 16.4296(8) Å, b = 15.747(1) Å, c = 16.637(1) Å, β = 109.2375(9)° and Z = 2. The complexes 1 and 2 exhibited the spin-crossover behavior depending on temperature within the temperature range of 200 to 350 K, and rapid spin equilibrium behavior was observed by means of Mössbauer spectroscopy at 293 K. The complexes 1 and 2 also exhibited a pressure-induced spin transition between the rapid spin equilibrium state and low-spin state at 300 K. Such a pressure-induced spin transition has not been reported earlier.
Type of Medium:
Online Resource
ISSN:
0009-2673
,
1348-0634
DOI:
10.1246/bcsj.74.2361
Language:
English
Publisher:
Oxford University Press (OUP)
Publication Date:
2001
detail.hit.zdb_id:
2041163-7
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