Abstract: B₂[(Me₂As)Mo₄O₁₅H]and B₄[(RP)₂Mo₅O₂₁]types of compounds were first prepared by M.T.Pope in1975 and 1976_{[1].Thereafter,the preparation of polytungstates and polymolybdates with organo-phosphonates and-arsonates "handles" has been in rapid progress[2].The potential uses of such compounds as antiviral and biological agents have been noted.}