Abstract
Tc2(μ-O2CCH3)4Cl2 is a key starting material for further explorations of dinuclear technetium(III) chemistry and is obtained in 70% yield from readily available starting materials via hydrothermal techniques. Its single crystal X-ray structure reveals the familiar paddle-wheel motif of four bridging acetate groups spanning a short Tc–Tc bond (2.1758(3)Å), augmented by axial chlorides at a Tc–Cl separation of 2.5078(4)Å. The Tc–Tc quadruple bond length is slightly shorter than the one found in the pivalate derivative, Tc2(O2CCMe3)4Cl2 (2.192(1)Å), and slightly longer than found in [Tc2(O2CCH3)4](TcO4)2 (2.149(1)Å), the only other structurally characterized members of the small family of Tc2(O2CR)4X2 dimers.
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