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Crystal structure and absolute configuration of guan‐fu G base methyliodide
Author(s) -
ShiZhi Chen,
XingQi Ma,
YaoPing Wang
Publication year - 1984
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19840020102
Subject(s) - diffractometer , chemistry , orthorhombic crystal system , absolute configuration , crystallography , guan , crystal structure , base (topology) , fourier transform , atom (system on chip) , stereochemistry , mathematics , mathematical analysis , humanities , computer science , embedded system , philosophy
Guan‐fu base G is a new alkaloid isolated from root tuber of Aconitum coreanum Le'vl Raipaics. Guan‐fu base G methyliodide crystallizes in orthorhombic system, space group D 4/2‐ P 2 1 2 1 2 1 , with dimensions: a = 16.87Å, b = 16.93Å, c = 10.09Å; Z = 4. The three dimensional data were collected on a Phillips PW‐1100 four‐circle diffractometer with Mo K a radiation. The structure was solved by heavy‐atom method and subsequently successive Fourier syntheses. The structure was refined by block‐diagonal matrix least squares methods to R = 0.0578 for 2848 reflexions. The absolute configuration was determined by computation of the R factor for the two possible configurations using anomalous scattering of iodine.
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