The single line mössbauer spectrum of [Fe(NH3)6]2+
1969; Elsevier BV; Volume: 4; Issue: 5 Linguagem: Inglês
10.1016/0009-2614(69)80175-2
ISSN1873-4448
AutoresG. M. Bancroft, Avelino Martı́n, B. E. Prater,
Tópico(s)Inorganic Fluorides and Related Compounds
ResumoThe Mössbauer spectrum of the [Fe(NH3)6]2+ cation consists of a single narrow line at room temperature. This unusual effect is attributed to the existence of a dynamic Jahn-Teller distortion which inverts the t2g orbitals very rapidly such that the time-averaged qvalence is zero. The observed splitting of 1500 cm-1 in the 5Eg state in the electronics spectrum of [Fe(NH3)6]Cl2 is consistent with this explanation. The small ferrous quadrupole splittings in [FeII(CH3CN)6][FeCl4]2 and [Fe(C6H5CN)6][FeCl4]2, and the three line Mössbauer spectrum of [Fe(NH3)6]Cl2 at 80°K are also discussed.
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