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Acta Cryst. (2012). E68, o223  [ doi:10.1107/S1600536811054535 ]

Ethane-1,2-diaminium (R)-2-[4-(1-carboxylatoethoxy)phenoxy]acetate

C.-Y. Ren, G.-F. Hou, Y.-H. Yu and J.-S. Gao

Online 23 December 2011

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Alert level C PLAT042_ALERT_1_C Calc. and Reported MoietyFormula Strings Differ ? PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds ............... 0.0061 Ang PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 3
Alert level G REFLT03_ALERT_4_G ALERT: MoKa measured Friedel data cannot be used to determine absolute structure in a light-atom study EXCEPT under VERY special conditions. It is preferred that Friedel data is merged in such cases. From the CIF: _diffrn_reflns_theta_max 27.48 From the CIF: _reflns_number_total 3288 Count of symmetry unique reflns 1847 Completeness (_total/calc) 178.02% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 1441 Fraction of Friedel pairs measured 0.780 Are heavy atom types Z>Si present no PLAT002_ALERT_2_G Number of Distance or Angle Restraints on AtSite 8 PLAT005_ALERT_5_G No _iucr_refine_instructions_details in CIF .... ? PLAT063_ALERT_4_G Crystal Size Likely too Large for Beam Size .... 0.62 mm PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature 293 K PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature 293 K PLAT791_ALERT_4_G Note: The Model has Chirality at C7 (Verify) R PLAT860_ALERT_3_G Note: Number of Least-Squares Restraints ....... 7
0 ALERT level A = Most likely a serious problem - resolve or explain 0 ALERT level B = A potentially serious problem, consider carefully 3 ALERT level C = Check. Ensure it is not caused by an omission or oversight 8 ALERT level G = General information/check it is not something unexpected 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 3 ALERT type 3 Indicator that the structure quality may be low 3 ALERT type 4 Improvement, methodology, query or suggestion 1 ALERT type 5 Informative message, check

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