Abstract
High-resolution 77Se solid-state NMR spectra are reported for [NMe4]2Se5 and [NMe4]2Se6. The isotropic chemical shifts for the former are similar to those observed for the Se52- ion in solution, suggesting that the conformation adopted by the anion is similar in the solid state and solution. The agreement between the chemical shifts for the Se62- anion in the solid state and solution is less good. The spectra show that the five selenium sites are distinct in [NMe4]2Se5 while the symmetry of [NMe4]2Se6 is such that there are only three crystallographically different selenium sites. Single-crystal X-ray structure determinations of [NMe4]2Se5 and [NMe4]2Se6 are reported which are consistent with this observation. Using α, β, and γ to signify the selenium atom positions relative to the ends of the chain, the shielding anisotropies for the α and β sites are large (in the range 720-1175 ppm), while those for the γ sites are lower than these (614 and 332 ppm).
| Original language | English |
|---|---|
| Pages (from-to) | 4299-4304 |
| Number of pages | 6 |
| Journal | Inorganic Chemistry |
| Volume | 34 |
| Issue number | 17 |
| Publication status | Published - 1995 |
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77Se solid-state NMR spectroscopy and structures of tetramethylammonium pentaselenide and hexaselenide complexes. / Barrie, Patrick J.; Clark, Robin J H; Chung, Duck Young; Chakrabarty, Debojit; Kanatzidis, Mercouri G.
In: Inorganic Chemistry, Vol. 34, No. 17, 1995, p. 4299-4304.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - 77Se solid-state NMR spectroscopy and structures of tetramethylammonium pentaselenide and hexaselenide complexes
AU - Barrie, Patrick J.
AU - Clark, Robin J H
AU - Chung, Duck Young
AU - Chakrabarty, Debojit
AU - Kanatzidis, Mercouri G
PY - 1995
Y1 - 1995
N2 - High-resolution 77Se solid-state NMR spectra are reported for [NMe4]2Se5 and [NMe4]2Se6. The isotropic chemical shifts for the former are similar to those observed for the Se52- ion in solution, suggesting that the conformation adopted by the anion is similar in the solid state and solution. The agreement between the chemical shifts for the Se62- anion in the solid state and solution is less good. The spectra show that the five selenium sites are distinct in [NMe4]2Se5 while the symmetry of [NMe4]2Se6 is such that there are only three crystallographically different selenium sites. Single-crystal X-ray structure determinations of [NMe4]2Se5 and [NMe4]2Se6 are reported which are consistent with this observation. Using α, β, and γ to signify the selenium atom positions relative to the ends of the chain, the shielding anisotropies for the α and β sites are large (in the range 720-1175 ppm), while those for the γ sites are lower than these (614 and 332 ppm).
AB - High-resolution 77Se solid-state NMR spectra are reported for [NMe4]2Se5 and [NMe4]2Se6. The isotropic chemical shifts for the former are similar to those observed for the Se52- ion in solution, suggesting that the conformation adopted by the anion is similar in the solid state and solution. The agreement between the chemical shifts for the Se62- anion in the solid state and solution is less good. The spectra show that the five selenium sites are distinct in [NMe4]2Se5 while the symmetry of [NMe4]2Se6 is such that there are only three crystallographically different selenium sites. Single-crystal X-ray structure determinations of [NMe4]2Se5 and [NMe4]2Se6 are reported which are consistent with this observation. Using α, β, and γ to signify the selenium atom positions relative to the ends of the chain, the shielding anisotropies for the α and β sites are large (in the range 720-1175 ppm), while those for the γ sites are lower than these (614 and 332 ppm).
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M3 - Article
AN - SCOPUS:0242272182
VL - 34
SP - 4299
EP - 4304
JO - Inorganic Chemistry
JF - Inorganic Chemistry
SN - 0020-1669
IS - 17
ER -