Acta Cryst. (2005). E61, o2635-o2637  [ doi:10.1107/S1600536805022737 ]

N,N'-Dimethylpiperazinium(2+) bis[methylenehydrogendiphosphonate(1-)]

Z. Yuan and W. Clegg

Online 20 July 2005

Key indicators

• Single-crystal X-ray study
• T = 120 K
• Mean (C-C) = 0.002 Å
• R factor = 0.028
• wR factor = 0.075
• Data-to-parameter ratio = 15.4

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT022_ALERT_3_C Ratio Unique / Expected Reflections too Low ....       0.94       
PLAT029_ALERT_3_C _diffrn_measured_fraction_theta_full Low .......       0.96       
PLAT042_ALERT_1_C Calc. and Rep. MoietyFormula Strings Differ ....          ?

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

   1 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
   2 ALERT type 3 Indicator that the structure quality may be low
   0 ALERT type 4 Improvement, methodology, query or suggestion

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