title: 12-Tungstophospho-ric acid-1,1'-methyl-enebis(imidazolidine-2,4-dione)-imidazolidine-2,4-dione-water (2/1/4/21.5).
abstract: In the asymmetric unit of the title organic-inorganic hybrid material, 2{H(3)[PW(12)O(40)]}·4C(3)H(4)N(2)O(2)·C(7)H(8)N(4)O(4)·21.5H(2)O, there are four crystallographically independent hydantoin mol-ecules, one dimerized hydantoin mol-ecule, viz. 1,1'-methyl-enebis(imidazolidine-2,4-dione, two independent H(3)PW(12)O(40) mol-ecules and 21.5 solvent water mol-ecules. Nine of the solvent water mol-ecules were refined as 0.5 occupancy. The tungstophosphoric acid moieties show characteristic features with respect to the bond lengths and angles.
authors.affiliation: Department of Chemistry, Ferdowsi University of Mashhad, Mashhad, 91779, Iran.
authors.forename: Mohammad Hasan
authors.initials: MH
authors.lastname: Alizadeh
authors.forename: Irandokht
authors.initials: I
authors.lastname: Mohammadi Zonoz