Abstract
A NITROGEN isostere of pentacyclo-octacosadodecaene, namely, 2,8,14,20 tetraazapentacyclo [19,3,1,13,7,19,13,115,19] octacosa-1[25],3,5,7[28],9,ll,13[27],15,17,19[26],21, 23-dodecaene, recently prepared in these laboratories, has a structural formula as shown in Fig. 1 and has been examined by optical and X-ray diffraction methods. Crystals were grown from the mother liquid in bunches of long, thin needles, up to 1 cm in length and with a cross-section of 0.1–0.3 mm. The prism faces showed well-developed forms of {100} and {110} with all interfacial angles, constant within experimental error, of 45°. Frequently the form {110} showed the greater development, but pinacoid and pyramidal faces were not observed.
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SMITH, G. Crystal Structure of a Nitrogen Isostere of Pentacyclo-Octacosadodecaene. Nature 198, 879 (1963). https://doi.org/10.1038/198879a0
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DOI: https://doi.org/10.1038/198879a0
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