Acta Cryst. (2007). E63, m900-m901  [ doi:10.1107/S1600536807008392 ]

2-Methylpiperazinium bis(dihydrogenarsenate)

H. S. Wilkinson and W. T. A. Harrison

Online 28 February 2007

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (C-C) = 0.004 Å
• Disorder in main residue
• R factor = 0.029
• wR factor = 0.074
• Data-to-parameter ratio = 29.0

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for        As1     
PLAT301_ALERT_3_C Main Residue  Disorder .........................       8.00 Perc.
PLAT764_ALERT_4_C Overcomplete CIF Bond List Detected (Rep/Expd) .       1.12 Ratio

Alert level G
PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature        293 K    
PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature .        293 K    

   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
   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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