Abstract
The asymmetric unit of the title salt, C10H20N3O2 +·C24H20B−, contains two cations and two tetraphenylborate ions. The C—N bond lengths in the central CN3 unit of the guanidinium ions range between 1.323 (2) and 1.381 (2) Å, indicating partial double-bond character. The central C atoms are bonded to the three N atoms in a nearly ideal trigonal–planar geometry and the positive charge is delocalized in the CN3 plane. The cationic six-membered rings are nonplanar, the dihedral angles between the N/C/N and C/C/C planes ranging from 45.8 (1) to 53.6 (1)°. In the crystal, C—H⋯π interactions are present between the guanidinium H atoms and the phenyl rings of the tetraphenylborate ions. The phenyl rings form aromatic pockets, in which the guanidinium ions are embedded.
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