Acta Cryst. (2008). E64, m858  [ doi:10.1107/S1600536808015791 ]

2,2'-(p-Phenylene)bis(1,4,5,6-tetrahydropyrimidinium) bis[dicyanidoargentate(I)]

Z.-Y. Jiang, H.-Z. Dong, G. Zhang and L. Cheng

Online 7 June 2008

Key indicators

• Single-crystal X-ray study
• T = 273 K
• Mean (C-C) = 0.006 Å
• R factor = 0.038
• wR factor = 0.093
• Data-to-parameter ratio = 14.9

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density ....       3.26      
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ ....          ?
PLAT062_ALERT_4_C Rescale T(min) & T(max) by .....................       0.99      
PLAT154_ALERT_1_C The su's on the Cell Angles are Equal  (x 10000)        200 Deg. 
PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd.  #          1      
              C14 H20 N4                                                       
PLAT790_ALERT_4_C Centre of Gravity not Within Unit Cell: Resd.  #          2      
              C2 Ag N2                                                         

Alert level G
FORMU01_ALERT_1_G  There is a discrepancy between the atom counts in the
            _chemical_formula_sum and _chemical_formula_moiety. This is
            usually due to the moiety formula being in the wrong format.
            Atom count from _chemical_formula_sum:   C18 H20 Ag2 N8
            Atom count from _chemical_formula_moiety:C18 H20 Ag2 N12

   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

   3 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
   0 ALERT type 3 Indicator that the structure quality may be low
   3 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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