Assembling anionic Sb(V)/(III) containing polyoxostibonates stabilized by triphenyltellurium cations

作者：Srungavruksham Nagarjuna Kumar; Baskar Viswanathan^*

来源：Dalton Transactions, 2015, 44(14): 6358-6362.

DOI：10.1039/c4dt03319a

Reactions of diphenyltellurium oxide with organostibonic acid and polymeric triphenylantimony oxide have been investigated independently. Single crystal X-ray diffraction studies have revealed the formation of novel and rare mixed valent Sb(V)/(III) containing polyoxostibonates {(C6H5)(3)Te}(2){Na-2(H2O)(2)(p-Br-C6H4SbV)(10)(Sb-III)(4)[(C6H5)(2)Te](4)(O)(30)(OH)(4)} 1 and {(C6H5)(3)Te}(4){[(C6H5)(2)Sb-V](4)(Sb-III)(4)(O)(12)(OH)(4)} 2. Solution Te-125 NMR supports the solid state structures presented. Interestingly, during the assembly of these POMs several processes happen simultaneously. Rarely observed reduction from Sb(V) to Sb(III), complete dearylation of organoantimony precursors and complexation ability of a tetraorganoditelluroxane moiety stabilizing large and novel POM structures (as in 1) along with the formation of triphenyltellurium cations which not only provide charge balance but also stabilize the POM framework (as in 2) by weak interactions are reported.

• 出版日期2015