The nitrosobenzene complex of hemoglobin is a violet pigment which is associated with nitrobenzene poisoning. Filehne (1) reported in 1878 that “nitrobenzol” (nitrobenzene) exerts its toxic effect by making blood unable to transport oxygen. This took place because nitrobenzene apparently underwent a reduction to form a hemoglobin complex with a characteristic spectroscopic absorption which did ...

In the title compound, C(2)H(7)N(4)O(+)·BF(4) (-), inter-molecular N-H⋯O hydrogen bonds connect the cations into chains parallel to the c axis, with graph-set motif C(4). These chains are in turn connected into a three-dimensional network by inter-molecular N-H⋯F hydrogen bonds. The B-F distances distances in the anion are not equal.