Acta Cryst. (2010). E66, o1245  [ doi:10.1107/S1600536810015643 ]

4-Nitrobenzoic acid-2,2'-biimidazole (2/1)

X. Liu and W. Zhu

Online 8 May 2010

Key indicators

• Single-crystal X-ray study
• T = 296 K
• Mean (C-C) = 0.003 Å
• R factor = 0.045
• wR factor = 0.134
• Data-to-parameter ratio = 11.7

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for         N3     
PLAT031_ALERT_4_C Refined Extinction Parameter within Range ......       3.25 Sigma
PLAT153_ALERT_1_C The su's on the Cell Axes   are Equal (x 100000)        100 Ang. 

Alert level G
PLAT860_ALERT_3_G Note: Number of Least-Squares Restraints .......          1      

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   3 ALERT level C = Check and explain
   1 ALERT level G = General alerts; check

   1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   1 ALERT type 2 Indicator that the structure model may be wrong or deficient
   1 ALERT type 3 Indicator that the structure quality may be low
   1 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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