Tetra-cobalt-substiituted Dimeric Tungstoantimonate: Na10[Co4(H2O)10(B- -SbW9O33)2]�36H2O

Abstract

A new tetra-cobalt-substiituted dimeric tungstoantimonate Na 10 [Co 4 (H 2 O) 10 (B-β-SbW 9 -O 33 ) 2 ]·36H 2 O 1 was synthesized in a weakly alkaline solution. The compound was characterized by elemental analysis and IR spectroscopy. A single-crystal X-ray analysis was carried out on the crystal 1 which crystallizes in monoclinic system, space group P 21/n, with a = 12.529 Å, b = 12.778 Å, c = 29.434 Å, α = 90.000º, β = 101.158º , γ = 90.000º and Z = 2. Polyanion 1 consists of two B-β-SbW 9 units which are linked by four cobalt ions leading to a Keggin-type tetra-cobalt-substiituted dimeric structure.