[{MoVI8VIV4O 36(VVO4)(VIVO)2 }n]7n−: capped α-Keggin fragments linked to a chain

The synthesis and single-crystal X-ray structure analysis of the unusual Mo/V polyoxometalate compound Na 0.5 K 6.5 [Mo VI 8 V IV 4 O 36 (V V O 4 )(V IV O) 2 ]·12.5H 2 O which contains capped α-Keggin fragments linked to a chain is reported; this chain is an interesting object for magnetochemists and can be considered to consist of an assembly of electron storage units.