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(UO2)2(¦Ì2-OH)(¦Ì3-OH)(his)(CH3CO2) (his=histidine) (1)Éó¸åÈËÒâ¼û²»»á´¦Àí
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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2Â¥: Originally posted by lich666 at 2014-09-27 12:23:17
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3Â¥: Originally posted by tzeshyang at 2014-09-27 13:18:02
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