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Electron Density and Charge Distribution around the Metal Atom in [Cp*Fe(η 5 ‐As 5 )]
Author(s) -
Herber Rolfe H.,
Scherer Otto J.
Publication year - 2000
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200012)2000:12<2451::aid-ejic2451>3.0.co;2-s
Subject(s) - chemistry , charge density , mössbauer spectroscopy , hyperfine structure , atom (system on chip) , quadrupole , crystallography , metal , mössbauer effect , nickel , spectroscopy , ferrocene , ring (chemistry) , atomic physics , electrochemistry , organic chemistry , electrode , physics , quantum mechanics , computer science , embedded system
57 Fe Mössbauer effect spectroscopy has been used to study the charge density, charge distribution, and lattice dynamics in the ferrocene‐related compound [Cp*Fe(η 5 ‐As 5 )]. The isomer shift (at 90 K) is significantly more positive than that observed for the related η 5 ‐P 5 homologue reported earlier, while the quadrupole hyperfine interaction is essentially the same in both compounds, but only about a quarter of that observed in related ferrocenes with only carbon atoms in the ring structure. The temperature dependence of the recoil‐free fraction evidences a discontinuity centered at about 213 K, which is also observed in the DSC data. These data are compared to related results acquired for homologous ferrocenes with variable ring substitution.