Open AccessDETERMINATION OF ACETYL PICRIAFELTARRAGENIN COMPOUND CRYSTAL STRUCTURE
Author(s) -
Xu Zhang-Bao,
QiTai Zheng,
Fan Hai-Fu
Publication year - 1982
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.31.1064
Subject(s) - diffractometer , molecule , crystal structure , crystal (programming language) , crystallography , physics , fourier transform , group (periodic table) , matrix (chemical analysis) , intensity (physics) , materials science , chemistry , optics , chromatography , computer science , quantum mechanics , programming language
Acetyl pieriafeltarragenin compound is an acetyl compound of picriafeltarra-genin which is one of effective component of plant Picria Fel-Tarrae Lour. The mole-cular formula is C34H48O7. Space group is D24-P21 21 21. The cell dimensions are a=22.357(10)?,b=15.277(8)?,c=9.089(4)?. Four molecules are contained in a cell (z=4).The intensity data were collected on a PW-1100 four circle diffractometer. The total number of independent reflections amounts to 2234. The crystal structure has been determined by direct method (MULTAN-78),and the structure parameters have been refined by means of full matrix Least.squares method to R=0.1099. The difference Fourier Syntheses gives out all the hydrogen positions.