TY - JOUR
T1 - Pressure-stabilized low-spin state for binuclear iron(III) spin-crossover compounds
AU - Hayami, Shinya
AU - Hosokoshi, Yuko
AU - Inoue, Katsuya
AU - Einaga, Yasuaki
AU - Sato, Osamu
AU - Maeda, Yonezo
PY - 2001/12
Y1 - 2001/12
N2 - Binuclear iron(III) spin-crossover complexes with salten ligand [Fe 2(salten) 2(L)](BPh 4) 2 were synthesized and characterized by single-crystal X-ray diffraction, M6ssbauer spectra, magnetic susceptibilities and electronic spectra, where H 2salten 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 [Fe 2(salten) 2(az)](BPh 4) 2 (1) and [Fe 2(salten) 2(cc)](BPh 4) 2 (2) were determined at both 100 K and 298 K. Crystal data for 1 at 100 K: C 98H 94 O 4N 10B 2Fe 2, monoclinic, space group P2 1/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) Å 3. Crystal data for 2 at 100 K: C 100H 96 O 4N 8B 2Fe 2, monoclinic, space group P2 1/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 M6ssbauer 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.
AB - Binuclear iron(III) spin-crossover complexes with salten ligand [Fe 2(salten) 2(L)](BPh 4) 2 were synthesized and characterized by single-crystal X-ray diffraction, M6ssbauer spectra, magnetic susceptibilities and electronic spectra, where H 2salten 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 [Fe 2(salten) 2(az)](BPh 4) 2 (1) and [Fe 2(salten) 2(cc)](BPh 4) 2 (2) were determined at both 100 K and 298 K. Crystal data for 1 at 100 K: C 98H 94 O 4N 10B 2Fe 2, monoclinic, space group P2 1/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) Å 3. Crystal data for 2 at 100 K: C 100H 96 O 4N 8B 2Fe 2, monoclinic, space group P2 1/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 M6ssbauer 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.
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U2 - 10.1246/bcsj.74.2361
DO - 10.1246/bcsj.74.2361
M3 - Article
AN - SCOPUS:0035696272
SN - 0009-2673
VL - 74
SP - 2361
EP - 2368
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 12
ER -