Magnetic Studies of Mixed Ligand Complexes of Iron(II)

Pressure effect studies in molecular magnetism

“…Above 95 K, the sample shows signals with large isomer shift [d ¼ 1.23(1) mm s À1 ] and quadrupole splitting [DE Q ¼ 3. 26(1) mm s À1 ] indicative of HS Fe II ions. Below 95 K, the spectra become more complex due to magnetic splitting.…”

“…We shall illustrate the effect of pressure on the following examples of different SCO behaviours: an abrupt spin transition, a gradual one and a pressure-induced spin transition in a paramagnetic compound. We have chosen the SCO systems [Fe(phen) 2 (NCS) 2 ] (phen ¼ 1,10-phenanthroline) (1) [26], [Fe(PM-Aza) 2 (NCS) 2 ] (PM-Aza ¼ (N-(2 0 -pyridylmethylen)-4-azophenylaniline) (2) [7a] and [Fe(abpt) 2 (NCS) 2 ] (abpt ¼ 4-amino-3, 5-bis(pyridin-2-yl)-1,2,4-triazole (3) [27] (Fig. 2).…”

cis-Dichlorobis(1,10-phenanthroline)iron(II)

“…The title compound, cis-[Fe(phen) 2 Cl 2 ], (I) (phen is 1,10phenanthroline), was previously reported by Baker & Bobonich (1963), and its magnetic behavior has been studied (Kö nig et al, 1967). However, its crystal structure has not yet been reported.…”

Measurement of wavefront distortions by the method of aperture sounding with spatially separated channels

“…In this section we illustrate the effect of pressure on the following examples of different SCO behaviours: an abrupt spin transition, a gradual one and a pressure induced spin transition in a paramagnetic compound. For this purpose, we have chosen the following systems: [Fe(phen) 2 (NCS) 2 ] (phen: 1,10-phenanthroline) (1) [25], [Fe(PM-Aza) 2 (NCS) 2 ] (PM-Aza: (N-(2 -piridylmethylen)-4-azophenyl aniline)) (2) [26] and [Fe(abpt) 2 (NCS) 2 ] (abpt: 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole) (3) [27] (figure 1). The two former compounds reveal an abrupt and a gradual spin transitions, respectively, at ambient pressure, whereas the third one is in the HS state over the whole range of temperatures under study.…”