نتایج جستجو برای: n 24
تعداد نتایج: 1267884 فیلتر نتایج به سال:
The structure of the title compound, C(19)H(28)O(2), has been redermined at 295 (2) K, with much improved precision. The structure and mol-ecular packing of the title compound was first reported by Coiro et al. [Acta Cryst. (1973). B29, 1404-1409] by means of potential-energy calculations. The cell parameters in this study differ considerably in space group C2. It is a derivative of testosteron...
The title mol-ecule, C(17)H(25)N(3)O(3), is built up from fused six- and five-membered rings linked to a -C(10)H(21) chain. The fused-ring system is essentially planar, the largest deviation from the mean plane being 0.009 (2) Å. The chain is roughly perpendic-ular to this plane, making a dihedral angle of 79.5 (2)°. In the crystal, N-H⋯O hydrogen bonds build infinite chains along [010]. There ...
Body centered structures are used as seeds for a variety of structures of rank 3 and higher. Propellane based structures are introduced and their design and topological properties are detailed.
The title compound, C26H42ClNO2, is a 3β-chloro steroid with a Weinreb amide at the C-24 position. The two cyclo-hexane and the cyclo-hexene rings adopt chair and boat conformations, respectively. The cyclo-pentane ring has an envelope conformation.
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