Synthesis and structure of a cerium coordination polymer templated by double-keggin-anion

A porous coordination polymer, {[Ce(dpdo)(4)(H2O)(3)](PMo12O40)(dpdo)(0.5)(H2O)(4)}(n) 1 (dpdo = 4,4'-bipyridine-NN'-dioxide), templated by double-Keggin-type polyanions was synthesized and structurally characterized. The crystal structure was determined by single-crystal Xray diffraction. The crystal is of triclinic, space group P (1) over bar with a = 13.368(4), b = 16.503(4), c = 18.506(5) angstrom, alpha = 88.831(5), beta = 82.095(5), gamma = 83.578(5)degrees, V = 4018.6(18) angstrom, Z = 2, C45H50N9O56CeMo12P, M-r = 2935.3 1, D-c = 2.426 g/m(3), mu = 2.491 mm(-1), F(000) = 2816, the final R = 0.0603 and wR = 0. 1611 for 11977 observed reflections with I > 2 sigma(I). Compound I exhibits a 3D non-interwoven framework with large cavities housing centrosymmetrically related shoulder-by-shoulder double-Keggin anions as guests.