Acta Cryst. (2010). E66, o178-o179  [ doi:10.1107/S1600536809053343 ]

N'-[(E)-2,6-Dichlorobenzylidene]pyrazine-2-carbohydrazide

R. A. Howie, M. V. N. de Souza, S. M. S. V. Wardell, J. L. Wardell and E. R. T. Tiekink

Online 16 December 2009

Key indicators

• Single-crystal X-ray study
• T = 120 K
• Mean (C-C) = 0.005 Å
• R factor = 0.052
• wR factor = 0.112
• Data-to-parameter ratio = 12.3

checkCIF/PLATON results

No syntax errors found




Alert level C
SHFSU01_ALERT_2_C  Test not performed. _refine_ls_shift/su_max and
            _refine_ls_shift/esd_max not present.
            Absolute value of the parameter shift to su ratio given   0.001
PLAT340_ALERT_3_C Low Bond Precision on  C-C Bonds (x 1000) Ang ..          5      
PLAT431_ALERT_2_C Short Inter HL..A Contact  Cl2    ..  N2      ..       3.00 Ang. 
PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) .....          1      
PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L=  0.595         14      
PLAT913_ALERT_3_C Missing # of Very Strong Reflections in FCF ....          1      

Alert level G
PLAT128_ALERT_4_G Non-standard setting of Space-group P21/c   ....      P21/n      

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

   0 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   2 ALERT type 2 Indicator that the structure model may be wrong or deficient
   4 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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