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北京石油化工学院2026年研究生招生接收调剂公告
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韦小妹

金虫 (小有名气)

[求助] 求助 急 已有2人参与

(UO2)2(μ2-OH)(μ3-OH)(his)(CH3CO2) (his=histidine) (1)审稿人意见不会处理
In the previous report there was the comment:-

  “1.4  We see from the CIF that there are 12 Uiso/Uij restrained atom sites and 102 least-squares restraints  used in the refinement.  So that the reader can be  fully aware of what was done to generate the reported models,  we should be told - at least in the "_refine_special_details" section of the CIF or in an ESI text  - exactly what these restraints were and why they were necessary.  [An easy way to show what restraints were employed(but not why they were needed) is to include the relevant lines from the SHELXL.ins file in the  "_refine_special_details" section of the CIF.  This should now be done.]

The authors have replied to this with the text:-
  “1.4  We have refined the structure of complex 1 carefully again, and
    the “_refine_special_details” section was added.”

Inspection of the submitted CIF shows that there are now 2 Uiso/Uij restrained atom sites and 12 least-squares restraints  used in the refinement - but no details in the explanatory details in the CIF. This should be corrected.
In this revised version, geometry calculations show that N2 is only 2.80(3)  Å  from O1 at (3/2-x, 3/2-y, 1-z).  
As a 2.80(3) Å separation could be consistent with an N-H•••O hydrogen bond, could it be that the  H3A atom shown as being bonded to N3 is only present with half-occupancy and is shared with N2?  Again a careful examination of a difference map in the plane of N2,C7,N3,C8,C6 might settle this perceived problem.
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tzeshyang

铁杆木虫 (小有名气)

引用回帖:
3楼: Originally posted by tzeshyang at 2014-09-27 13:18:02
为什么N3和N2以0.5的占有率共享H3A?因为NH和OH的距离太接近?...

抱歉。。。搞错了。请无视之前我的问题。。。
4楼2014-09-27 13:26:16
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匿名

用户注销 (知名作家)

精修问题可私信


感谢参与,应助指数 +1
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2楼2014-09-27 12:23:17
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tzeshyang

铁杆木虫 (小有名气)

【答案】应助回帖

感谢参与,应助指数 +1
引用回帖:
2楼: Originally posted by lich666 at 2014-09-27 12:23:17
从字面上看,审稿人说你在精修过程中用了很多限制,你需要解释一下你这些限制是什么和为什么使用这些限制。限制的细节需要放在CIF中_refine_special_details项下。(个人建议你拿xl2013修一下,自动生成限制的细节。 ...

为什么N3和N2以0.5的占有率共享H3A?因为NH和OH的距离太接近?
3楼2014-09-27 13:18:02
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