Acta Cryst. (2010). E66, o2668  [ doi:10.1107/S1600536810038006 ]

1,1',2,2'-Tetramethyl-3,3'-(p-phenylenedimethylene)diimidazol-1-ium bis[bis(trifluoromethylsulfonyl)imide]

M. S. Abdul Rahim, Y. Alias and S. W. Ng

Online 30 September 2010

Key indicators

• Single-crystal X-ray study
• T = 100 K
• Mean (C-C) = 0.003 Å
• R factor = 0.034
• wR factor = 0.092
• Data-to-parameter ratio = 15.8

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L=  0.600         25      
PLAT042_ALERT_1_C Calc. and Reported MoietyFormula Strings  Differ          ?
PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L=  0.600         32      

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:   C22 H24 F12 N6 O8 S4
            Atom count from _chemical_formula_moiety:C20 H24 F12 N6 O8 S4
PLAT128_ALERT_4_G Alternate Setting of Space-group P21/c   .......      P21/n      

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

   2 ALERT type 1 CIF construction/syntax error, inconsistent or missing data
   0 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
   2 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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