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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Structure of beta-trimyristin and beta-tristearin from high-resolution X-ray powder diffraction data
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Structure of beta-trimyristin and beta-tristearin from high-resolution X-ray powder diffraction data

机译:高分辨率X射线粉末衍射数据显示的β-三豆蔻精和β-豆蔻精的结构

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摘要

The crystal structures of beta -1,2,3-tritetradecanoylglycerol (beta -trimyristin or beta -MMM) and beta -1,2,3-trioctadecanoylglycerol (beta -tristearin or beta -SSS) have been determined from high-resolution synchrotron X-ray powder diffraction data. Grid search and Rietveld refinement have been used to determine and refine the structure, respectively. Both substances crystallize in space group P (1) over bar with Z = 2. The unit-cell parameters for beta -MMM are a = 12.0626 (6), b = 41.714 (1), c = 5.4588 (3) Angstrom, alpha = 73.388 (4), beta = 100.408 (5) and gamma = 118.274 (4)degrees. For beta -SSS the unit-cell parameters are a = 12.0053 (7), b = 51.902 (2), c = 5.4450 (3) Angstrom, alpha = 73.752 (5), beta = 100.256 (6) and gamma = 117.691 (5)degrees. Soft-distance restraints have been applied to the molecules during refinement. For beta -MMM the final R-p value obtained is 0.053 and for beta -SSS the final R-p value is 0.041. [References: 25]
机译:已从高分辨率同步加速器X确定了β-1,2,3-三十四烷酰甘油(β-trimyristin或beta -MMM)和β-1,2,3-三十八烷酰甘油(beta -tristearin或beta -SSS)的晶体结构。 -射线粉末衍射数据。网格搜索和Rietveld细化已分别用于确定和细化结构。两种物质均在Z = 2的棒上的空间群P(1)中结晶。β-MMM的晶胞参数为a = 12.0626(6),b = 41.714(1),c = 5.4588(3)埃,α = 73.388(4),beta = 100.408(5)和gamma = 118.274(4)度。对于beta -SSS,晶胞参数为a = 12.0053(7),b = 51.902(2),c = 5.4450(3)埃,alpha = 73.752(5),beta = 100.256(6)和gamma = 117.691( 5)度。在精炼过程中,对分子施加了软距离约束。对于β-MMM,获得的最终R-p值为0.053,对于β-SSS,最终R-p值为0.041。 [参考:25]

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