The crystal structure of the title compound, 2,2-dimethyl-1,3-propanediammo
nium chromate, (C5H16N2)[CrO4], consists of layers built up from CrO42- tet
rahedra alternating with diprotonated 2,2-dimethylpropylendiamine molecules
. N-H ... O hydrogen bonds ensure the cohesion and stability of the structu
re.