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Crystallographic studies in the pyrrole series. Part II. Crystal and molecular structure of 5,5′-diethoxycarbonyl-3,3′,4,4′- tetraethyldipyrrol-2-ylmethane

Bonnett, R; Hursthouse, MB; Neidle, S; (1972) Crystallographic studies in the pyrrole series. Part II. Crystal and molecular structure of 5,5′-diethoxycarbonyl-3,3′,4,4′- tetraethyldipyrrol-2-ylmethane. Journal of the Chemical Society, Perkin Transactions 2 (10) pp. 1335-1340.

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Abstract

Crystals of the title compound (III) are monoclinic, space group P2 1/c, with cell dimensions a = 8.655(2), b = 17.781 (4), c = 15.465(4) Å and β = 102.70(2)°. The structure was solved by direct methods and refined by block-matrix least-squares techniques to R 0.0713 for 2711 observed reflections. The pyrrole rings are distorted from the C2v symmetry of pyrrole, but the distortion is much less marked than that found earlier with 3-acetyl-5-ethoxycarbonyl-4-ethyl-2-methylpyrrole (I). The two carbonyl groups of (III) are arranged in different orientations with respect to the N ⋯ H vectors, one syn and the other anti. The molecules are arranged in the crystal lattice as hydrogen-bonded, centrosymmetrically related dimers.

Type: Article
Title: Crystallographic studies in the pyrrole series. Part II. Crystal and molecular structure of 5,5′-diethoxycarbonyl-3,3′,4,4′- tetraethyldipyrrol-2-ylmethane
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > UCL School of Pharmacy
URI: http://discovery.ucl.ac.uk/id/eprint/1378814
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