A Nonanuclear Organostiboxane Cage

The first example of a nonanuclear organostiboxane cage, [(Ph2Sb)(2)(PhSb)(7)(mu-O)(II)(mu(3)-O)(3)(mu-OH)(2)(mu-cycPO(2))(2)(cyc-PO2)(2)(H2O)(2)]center dot 2CH(3)CN center dot H2O, containing Sb(V) has been assembled by a mild hydrolysis and Sb-C bond cleavage reaction of [(Ph3Sb)(2)(mu-O)(mu-cycPO(2))(2)] (cycPO(2) = 1,1,2,3,3-pentamethyltrimethylene phosphinate).