ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The crystal and molecular structure of the thermodynamically more stable isomer of 24,25-dibromolanost-8-en-3β-yl acetate, the ‘A’ form, has been solved by the heavy-atom method and refined by full-matrix least-squares methods to a finalR-value of 0.153 for 2354 reflections. The crystals are orthorhombic:P212121,a = 40.889,b = 9.990,c = 7.839Å,Z = 4. Some difficulties were encountered owing to both radiation damage and the unusual positions of the bromine atoms. The analysis shows the configuration at C(24) to be 24S, and the rest of the structure does not reveal any unexpected features.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01209534
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