title: Bis[2-(pyrimidin-2-ylamino)pyrimidin-ium] hexa-molybdate.
abstract: The title compound, (C(8)H(8)N(5))(2)[Mo(6)O(19)], was prepared by reaction of Mo(CO)(6) and dipyrimidylamine in refluxing toluene. The hexa-nuclear polyoxomolybdate anions lie on centres of inversion. Each 2-(pyrimidin-2-ylamino)pyrimidinium cation forms an intra-molecular N-H⋯N hydrogen bond and the cations are linked through self-complementary pairs of N-H⋯N hydrogen bonds into dimers across centres of inversion. The cations and anions are inter-linked through C-H⋯O contacts.
authors.affiliation: Department of Chemistry, Chung-Yuan Christian University, Chung-Li 320, Taiwan.
authors.forename: Chun-Wei
authors.initials: CW
authors.lastname: Yeh
authors.forename: Chia-Her
authors.initials: CH
authors.lastname: Lin
authors.forename: Jhy-Der
authors.initials: JD
authors.lastname: Chen