Acta Cryst. (2009). E65, o765-o766  [ doi:10.1107/S1600536809006990 ]

4-Aminopyridinium hydrogen succinate

H.-K. Fun, J. John, S. R. Jebas and T. Balasubramanian

Online 14 March 2009

Key indicators

• Single-crystal X-ray study
• T = 100 K
• Mean (C-C) = 0.003 Å
• R factor = 0.062
• wR factor = 0.150
• Data-to-parameter ratio = 14.7

checkCIF/PLATON results

No syntax errors found




Alert level C
            Value of measurement temperature given =   100.000
            Value of melting point given =     0.000
PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor ....       3.71      
PLAT250_ALERT_2_C Large U3/U1 Ratio for Average U(i,j) Tensor ....       2.56      
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ ....          ?
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical .          ?
PLAT152_ALERT_1_C Supplied and Calc Volume s.u. Inconsistent .....          ?

Alert level G
PLAT720_ALERT_4_G Number of Unusual/Non-Standard Labels ..........          4      

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   5 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
   2 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
   1 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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