Pentaguanidinium monohydrogendiphosphopentamolybdate(VI) 2.5-hydrate, (CH6N3)5[HP2Mo5O 23]·-2.5H2O: Hydrogen bonding and π-stacking in guanidinium cations

Pietro Di Tondo, Robin Gavin Pritchard

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The asymmetric unit of the title compound consists of two crystallographically independent, but structurally identical, [HP 2Mo5O23]5- anions, ten guanidinium cations and five water mol-ecules. Each singly protonated diphospho-penta-molyb- date(VI) anion retains the typical geometry of a ring of five edge-sharing MoO6 octa-hedra [Mo⋯Mo = 3.3265 (8)-3.4029 (10) Å], except for one corner-sharing link [Mo⋯Mo = 3.6642 (7) and 3.6826 (8) Å]. Two capping PO4 tetra-hedra share corners with the five octa-hedra. Despite being surrounded by an extensive network of hydrogen bonds, predominantly from the guanidinium cations, short P - O - H⋯O=P contacts [O⋯O = 2.519 (7) and 2.457 (7) Å] associate the anions into infinite columns generated by the c-glide. In addition to their heavy involvement in hydrogen bonding, with all N - H donors being utilized, the guanidinium cations assemble into extensive π-stacked columns with an average inter-planar spacing of 3.53 Å. © 2012 International Union of Crystallography.
    Original languageEnglish
    Pages (from-to)50-52
    Number of pages2
    JournalActa Crystallographica Section C: Crystal Structure Communications
    Volume68
    Issue number7
    DOIs
    Publication statusPublished - Jul 2012

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