Crystal structure of diethyl 3-(3-chloro­phen­yl)-2,2-di­cyano­cyclo­propane-1,1-di­carboxyl­ate

In the racemic title compound, C(17)H(15)ClN(2)O(4), which has been synthesized and the crystal structure of the solvent-free mol­ecule determined, the angle between the planes of the benzene and cyclo­propane rings is 54.29 (10)°. The mol­ecular conformation is stabilized by two weak intra­molecular C—H⋯O(carbox­yl) inter­actions. In the crystal, C—H⋯O hydrogen bonds form centrosymmetric cyclic R (2) (2)(10) dimers which are linked into chain substructures extending along c. Further C—H⋯N(nitrile) hydrogen bonding, including a centrosymmetric cyclic R (2) (2)(14) association, link the chain substructures, forming a two-dimensional layered structure extending across the approximate ab plane. No significant π–π or halogen–halogen inter­molecular inter­actions are present in the crystal.