The structure of cyclopropane-1,1-dicarboxamide

Usha, R. ; Venkatesan, K. (1979) The structure of cyclopropane-1,1-dicarboxamide Acta Crystallographica - Section B: Structural Crystallography & Crystal Chemistry, 35 (11). pp. 2730-2732. ISSN 0567-7408

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C5H8N2O2, Mr=128, monoclinic, Cc or C2/c, a=10.236 (2), b=6.432 (2), c=9.444 (2) Å, β=104.62 (2)°, V=601.6 Å3, Z=4, Dm=1.42, Dx=1.413 Mg m-3, μ(Mo Kα, λ=0.7107 Å)=0.12 mm-1, F(000)=272. The structure, which was solved by direct methods in the space group C2/c, has been refined to an R value of 5.2% using 464 intensity measurements. The C=O and C-N bonds of the amide groups show unusual bond lengths. A rotational-disorder mechanism which would account for both the bond-length anomaly and the space-group ambiguity, has been proposed.

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