(NH 4 ) 2 [Tc 2 O 2 (S 2 O 7 ) 4 ]: An Unexpected Technetium(V)‐Sulfate From the Reaction of (NH 4 )(TcO 4 ) With SO 3
Year: 2025
Type: article
Abstract: ABSTRACT The reaction of ammonium pertechnetate, (NH 4 )(TcO 4 ), with SO 3 leads to crystals of (NH 4 ) 2 [Tc 2 O 2 (S 2 O 7 ) 4 ] (monoclinic, P 2 1 / c , Z = 2, a = 775.67(5), b = 1339.55(8), c = 1233.32(8) pm, β = 100.566(2)°). The compound contains the dimeric [Tc 2 O 2 (S 2 O 7 ) 4 ] 2− anion with the Tc atom connected by disulfate anions. It is astonishing that even under the oxidizing reaction conditions, reduction of the Tc(VII) starting material occurs. Contrastingly, an analogous reaction of (NH 4 )(ReO 4 ) with SO 3 gives the Re(VII) sulfate (NH 4 )[ReO 2 (S 2 O 7 ) 2 ] (orthorhombic, Pca 2 1 , Z = 8, a = 1842.7(1), b = 847.03(5), c = 1663.8(1) pm). The compounds have been further studied by vibrational spectroscopy and quantum mechanical calculations.
Source: Chemistry - A European Journal
Institutions: University of Cologne, Technische Universität Berlin
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,640
OpenAlex ID: W4416825937