首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Charge density study of N-acetyl-L-tyrosine ethyl ester monohydrate derived from CCD area detector data
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Charge density study of N-acetyl-L-tyrosine ethyl ester monohydrate derived from CCD area detector data

机译:N-乙酰基-L-酪氨酸乙酯一水合物的电荷密度研究,基于CCD面积检测器数据

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摘要

The crystal structure, thermal vibrations and electron density of the peptide N-acetyl-L-tyrosine ethyl ester monohydrate, C13H17NO4. H2O, have been analysed using single-crystal X-ray diffraction data collected at 110K with Mo K alpha radiation to a resolution of (sin theta/lambda)(max) = 1.1 Angstrom(-1). A CCD area detector was used to collect 98 393 data during one week. A multipolar atom density model was fitted against the 10 189 unique data with I > 2 sigma(I) [R(F) = 0.027, wR(F) = 0.020, g.o.f. = 0.65] in order to map the valence electron distribution. These deformation densities compare very well with those obtained from conventional diffractometers equipped with scintillation detectors. This work shows that area detectors permit charge density studies in a more routine way than is possible with conventional diffractometers. [References: 28]
机译:肽N-乙酰基-L-酪氨酸乙酯一水合物C13H17NO4的晶体结构,热振动和电子密度。使用在110 K下以Mo Kα辐射收集的单晶X射线衍射数据分析了H2O,其分辨率为(sin theta / lambda)(max)= 1.1埃(-1)。 CCD区域检测器在一周内收集了98393个数据。针对I> 2 sigma(I)的10 189个唯一数据拟合了多极原子密度模型[R(F)= 0.027,wR(F)= 0.020,g.o.f. = 0.65],以便绘制价电子分布图。这些变形密度与从配备有闪烁检测器的常规衍射仪获得的变形密度非常好。这项工作表明,与传统的衍射仪相比,面积检测器可以更常规的方式进行电荷密度研究。 [参考:28]

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