cqvip:The crystal structure of N-(1-adamantyl)urea (tricyclo[3,3,1,13,7]decan-1-urea, C11H18N2O) has been determined by X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/c with a = 13.070(2), b = 8.942(1), c = 9.390(1) ’, β = 109.819(8)°, V = 1032.5(2) ’3, Mr = 194.27, Z = 4, Dc = 1.250 g/cm3, μ = 0.081 mm-1, F(000) = 424, R = 0.0427 and wR = 0.1076 for 1105 observed reflections with I > 2σ(I). The structure of the title compound consists of an adamantly cage which is a stable tricyclo structure with chair conformation and the substituted urea forms the interlayer-type crystal structure via hydrogen bonds between the molecules.
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