Palladium(II)-Containing Tungstoarsenate(V), [PdII4(As2W15O56)2]16-, and Its Catalytic Properties

Ananthu Rajan; Ali S Mougharbel; Saurav Bhattacharya; Talha Nisar; Veit Wagner; Ulrich Kortz

doi:10.1021/acs.inorgchem.0c01737

Palladium(II)-Containing Tungstoarsenate(V), [Pd^II₄(As₂W₁₅O₅₆)₂]^16-, and Its Catalytic Properties

Inorg Chem. 2020 Sep 21;59(18):13042-13049. doi: 10.1021/acs.inorgchem.0c01737. Epub 2020 Sep 1.

Authors

Ananthu Rajan¹, Ali S Mougharbel¹, Saurav Bhattacharya¹, Talha Nisar², Veit Wagner², Ulrich Kortz¹

Affiliations

¹ Department of Life Sciences and Chemistry, Jacobs University, Campus Ring 1, 28759 Bremen, Germany.
² Department of Physics and Earth Sciences, Jacobs University, Campus Ring 1, 28759 Bremen, Germany.

PMID: 32869984
DOI: 10.1021/acs.inorgchem.0c01737

Abstract

We have synthesized and structurally characterized the 4-palladium(II)-containing 30-tungsto-4-arsenate(V), [Pd₄(As₂W₁₅O₅₆)₂]^16- (1), which represents the first palladium(II)-containing tungstoarsenate(V). The title polyanion 1 was prepared by a simple one-pot procedure in aqueous medium and characterized by single-crystal X-ray diffraction (XRD), thermogravimetric analysis (TGA), cyclic voltammetry, elemental analysis, and ¹⁸³W nuclear magnetic resonance (NMR), infrared (IR), and ultraviolet-visible (UV-vis) spectroscopies. Polyanion 1 consists of four Pd²⁺ ions that are coordinated in a square-planar geometry to two trilacunary [As₂W₁₅O₅₆]^12- Wells-Dawson fragments resulting in a sandwich-type assembly. Catalytic studies on 1 revealed that it is an efficient catalyst precursor for the Suzuki-Miyaura cross-coupling reactions of various aryl halides in aqueous and nonaqueous media.