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[审稿意见] 晶体数据审稿意见-限制需给出理由

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审稿意见:
it wouldbe helpful if additional information on the crystal structure processing wasprovided in the supplementary information. For example, that two of thestructures were pseudomerohedral twins, plus any constraints and restraintsreported.
类似的还有:
The reasons for using the restraints andconstraints should be given.
这些审稿意见主要就是让作者把晶体结构解析和精修过程中的特殊情况(如孪晶等)、添加的约束和限制等进行说明解释,并以文字的形式写入CIF中适当位置或者论文的适当位置(通常在支持信息部分)。
案例来源:Nat. Commun. 2023, 14, 2968.
DOI10.1038/s41467-023-38606-2
以下内容摘自支持信息(右侧中文部分为编者根据自身理解添加)
  
For compound 5:
  
Alert  level B
  
PLAT090_ALERT_3_B  Poor Data / Parameter Ratio (Zmax > 18) ........ 5.54 Note
  
Response:  A large number of parameters are increased due to large number of disordered  groups in the structure, resulting in a decrease in the data/parameter ratio.
  
B级警报PLAT090的解释说明
Refinement of 2: All  the fluorine atoms of CF3 groups on  tetra(3,5-trifluoromethylphenyl)boron anion were refined as disorder on two  sites with occupancies of 0.437:0.563 (F1~F2:F1A~F3A), 0.681:0.319  (F4~F6:F4A~F6A), 0.256:0.744 (F7~F9:F7A~F9A), 0.167:0.833  (F10~F12:F10A~F12A), 0.822:0.178 (F13~F15:F13A~F15A), 0.604:0.396  (F16~F18:F16A~F18A), 0.876:0.124 (F19~F21:F19A~F21A), 0.682:0.318 (F22~F24:F22A~F24A),  respectively. Some C-F bond lengths and F···F distances in same CF3 group  were restrained to be equal with an effective standard deviation 0.02 by  applying the following SHELXL SADI instruction:
(3,5-三氟甲基苯基)硼阴离子上的三氟甲基的所有氟原子均精修为二组分无序,F···F距离在0.02的标准偏差范围内限制为相同
SADI  0.02 F5 C43 F5A C43
  
SADI  0.02 F4 C43 F4A C43
  
SADI  0.02 F6 C43 F6A C43
  
SADI  0.02 F14A F13A F15A F13A F15A F14A
  
SADI  0.02 F18A F16A F17A F16A F18A F17A
具体采用的F···F距离限制指令
All  the fluorine atoms closer than 3.8 Å were restrained with effective standard  deviation 0.01 to have the same Uij  components by applying the following SHELXL SIMU instruction:
相距3.8 Å内的所有氟原子用SIMU指令限制使其在0.01标准偏差范围内具有相同的Uij分量
SIMU  0.01 0.02 3.8 $F
具体添加的SIMU指令
Some  fluorine atoms were restrained with effective standard deviation 0.005 so  that their Uij  components approximate to isotropic behavior by applying the following SHELXL  ISOR instruction:
一些氟原子使用ISOR指令限制使其Uij分量在0.005标准偏差范围内近似各向同性
ISOR  0.005 0.01 F24A F24 F23A F23 F22A F22
具体添加的ISOR指令
The  above SHELXL restraints were applied to make the refinement stable and the  geometry of CF3 groups chemically reasonable.
以上所有SHELXL限制的应用是为了使精修稳定以及使三氟甲基化学上合理
论文中其他数据的描述类似,感兴趣可以查看原论文。
另外也可以将其作为一个大体的模板参考。

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