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Acta Cryst. (2013). E69, o899
[ doi:10.1107/S1600536813012786 ]

N-[3-(Benzyldimethylazaniumyl)propyl]-N',N',N'',N''-tetramethylguanidinium bis(tetraphenylborate)

I. Tiritiris

Abstract: In the crystal structure of the title salt, C17H32N42+·2C24H20B-, the C-N bond lengths in the CN3 unit of the guanidinium ion are 1.323 (4), 1.336 (5) and 1.337 (5) Å, indicating partial double-bond character in each. The C atom of this unit is bonded to the three N atoms in a nearly ideal trigonal-planar geometry [N-C-N angles = 117.7 (4), 120.9 (3) and 121.4 (3)°] and the positive charge is delocalized in the CN3 plane. The bonds between the N atoms and the terminal C-methyl groups of the guanidinium moiety all have values close to a typical single bond [1.452 (5)-1.484 (6) Å]. In the crystal, C-H...[pi] interactions are present between guanidinium H atoms and the phenyl rings of both tetraphenylborate ions. This leads to the formation of a two-dimensional supramolecular pattern along the ab plane.

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