A new ring-shaped Cr-containing tungstophosphate based on [H 2 P 2 W 12 O 48 ] 12−

Abstract A new Cr-containing tungstophosphate [(Cr(H 2 O) 2 ) 3 (H 2 P 2 W 12 O 48 ) 3 ] 27 − ( 1a ) was prepared via simple, one-pot reaction method, which was isolated as hydrated potassium salt, K 4 [H 23 (Cr(H 2 O) 2 ) 3 (H 2 P 2 W 12 O 48 ) 3 ]·34H 2 O ( 1 ). Compound 1 was characterized by single-crystal X-ray diffraction, FT-IR, UV-vis, elemental analyses, thermal analysis, electrochemistry and electrospray ionization mass spectrometry. Polyoxoanion 1a is composed of three {P 2 W 12 } subunits linked by three {Cr(H 2 O) 2 } bridges alternately, forming a ring in a corner-sharing mode. Moreover, variable temperature magnetic susceptibility indicates that 1 shows antiferromagnetic behavior.