Tellurasiloxane Cages Containing Te₆Si₄O₁₂ and Te₆Si₆O₁₅ Frameworks

Reaction of the silanetriol t-BuSi(OH)3 with (p-Me2NC6H4)2TeO in a 4:6 ratio resulted in the formation of [((p-Me2NC6H4)2Te)6(t-BuSiO3)4]·1.5 C7H8 (1·1.5C7H8). In contrast, the reaction of tetrahydroxy-1,3-disiloxane, [t-BuSi(OH)2]2O with (p-MeOC6H4)2TeO in a 3:6 ratio afforded [((p-MeOC6H4)2Te)6(t-BuSi)6O15] · 2 C7H8 (2·2C7H8). 1 possesses a tetrahedron cage structure in which the vertices of the tetrahedron are occupied by silicon atoms. Each pair of silicon atoms is connected to each other by a R2TeO2 motif. The six O−Te−O bridges occupy the edges of the tetrahedron. In contrast to 1, the structure of 2 can be described as a trigonal prismatic cage. The latter consists of two Te3Si3O6 rings that are interconnected to each other through three Si−O−Si linkages. The structure of 2 is reminiscent of a double-six-ring (D6R) secondary building unit (SBU) framework found in zeolites such as faujasite. Reaction of (p-Me2NC6H4)2TeO or (p-MeOC6H4)2TeO with the disiloxane-1,3-diol, [Ph2Si(OH)]2O in a 2:2 ratio afforded [((p-Me2NC6H4)2Te)(OPh2Si−O−SiPh2O)]2 (3) and [((p-MeOC6H4)2Te)(OPh2Si−O−SiPh2O)]2·CH3CN (4·CH3CN). In contrast to 1 and 2, the compounds 3 and 4 contain puckered 12-membered Te2Si4O6 rings.