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elwew

木虫 (正式写手)

[求助] 编辑给的回信是这样,是不是就发不了单晶了?还有什么补救办法吗

I have reviewed your structure report and before going into any detail I would like to ask whether there is a possibility to find a better crystal? You report only 1862 observed reflections but 268 refined parameters. Since the data/parameter ratio for a properly refined structure should approximately be 10 your data set contains not enough data to refine such a number of parameters. In additon, there are no negative intensities in the data set. Have they been merged? Probably because there were too much of them due to a either very small or unsufficiently diffracting crystal?

If I additionally take into account that for a refinement with a low data/parameter ratio R values are lower due to statistic effects, your structure from my point of view does not meet the standards of Acta E.
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ylhttzj

至尊木虫 (知名作家)

【答案】应助回帖

感谢参与,应助指数 +1
测得的单晶衍射太弱了,要么是晶体质量差或者是测定过程中晶体风化了。你的晶体质量还好的话,封管测定一下(最好是低温XRD)。如果晶体质量不好的话,只能重新培养了。

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10楼2012-04-05 13:29:24
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