结构化学
結構化學
결구화학
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
2001年
3期
187-190
,共4页
迟国臣%陈如玉%王宏根%姚心侃
遲國臣%陳如玉%王宏根%姚心侃
지국신%진여옥%왕굉근%요심간
nucleosides%ketonucleosides%semi-ketal%conformation
The title compound, C23H42N2OsSi2, Mr=530.77, crystallizes in the monoclinic system, space group P21, with a=10.577(5), b=10.528(2), c=13.374(5)A, β=100.63(3)°,V=1461 (2)A3, Z=2, Dx=1.207g/cm3, λ(MoKa)=0.71073A,μ=1.590mm-1, T=299+1K, F(000)=572,R=0.070 and Rw=0.075 for 1232 observed reflections with Ⅰ≥3σ(Ⅰ). The analysis result indicates that the configuration of the title compound at C(2') is S. In the crystal state the molecule has anticonformation about glycosidic bond with the torsion angle -126.96°. The sugar ring is puckered with C3'-endo-C4'-exo, and the conformation of the C(4')-C(5') bond is +sc.
