N′-[(2-n-Butyl-4-chloro-1H-imidazol-5-yl)­methyl­idene]adamantane-1-carbo­hydrazide sesquihydrate ethanol hemi­solvate

In the asymmetric unit of the title compound, C19H27ClN4O·0.5C2H6O·1.5H2O, there are two mol­ecules of the Schiff base, which has a rigid adamantyl cage at one end of the C(= O)NH–N=CH– chain and an almost planar [torsion angles = 1.3 (1) and 7.9 (2)° imidazolyl ring at the other end, three mol­ecules of water and one mol­ecule of ethanol. In both independent mol­ecules of the Schiff base, this chain displays an extended zigzag configuration. All their amino groups function as hydrogen-bond donors to water mol­ecules; these are linked to other acceptor atoms, generating a layer structure. O—H[cdots, three dots, centered]O and O—H[cdots, three dots, centered]N inter­actions involving the water mol­ecules also occur