N,N,N′,N′-Tetramethyl-N′′-[3-(trimethylazaniumyl)propyl]guanidinium bis(tetraphenylborate) acetone disolvate

In the title solvated salt, C11H28N42+·2C24H20B−·2C3H6O, the C—N bond lengths in the central CN3 unit of the guanidinium ion are 1.3331 (16), 1.3407 (16) and 1.3454 (16) Å, indicating partial double-bond character in each. The central C atom is bonded to the three N atoms in a nearly ideal trigonal–planar geometry [N—C—N angles = 118.96 (11), 120.51 (12) and 120.53 (11)°] 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 [1.4601 (16)–1.4649 (16) Å]. In the crystal, the guanidinium ion is connected by N—H...O and C—H...O hydrogen bonds with the acetone molecules. C—H...π interactions are present between the guanidinium H atoms and the phenyl rings of both tetraphenylborate ions. The phenyl rings form aromatic pockets, in which the guanidinium ions are embedded.

Abstract licence: CC BY

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