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Acta Cryst. (2013). E69, o1051  [ doi:10.1107/S1600536813015535 ]

2-Methyl-1,2,4-triazolo[4,3-a]pyridin-2-ium tetrafluoroborate

S. Wei, L. Wang and Q. Wang


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Alert level B Crystal system given = orthorhombic PLAT242_ALERT_2_B Check Low Ueq as Compared to Neighbors for B1
Alert level C DIFMX01_ALERT_2_C The maximum difference density is > 0.1*ZMAX*0.75 _refine_diff_density_max given = 0.736 Test value = 0.675 DIFMX02_ALERT_1_C The maximum difference density is > 0.1*ZMAX*0.75 The relevant atom site should be identified. PLAT097_ALERT_2_C Large Reported Max. (Positive) Residual Density 0.74 eA-3 PLAT431_ALERT_2_C Short Inter HL..A Contact F2 .. N1 . 2.91 Ang. PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 21 PLAT939_ALERT_3_C Large Value of Not (SHELXL) Weight Optimized S . 10.35
Alert level G PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? Do ! PLAT072_ALERT_2_G SHELXL First Parameter in WGHT Unusually Large. 0.16
0 ALERT level A = Most likely a serious problem - resolve or explain 1 ALERT level B = A potentially serious problem, consider carefully 6 ALERT level C = Check. Ensure it is not caused by an omission or oversight 2 ALERT level G = General information/check it is not something unexpected 1 ALERT type 1 CIF construction/syntax error, inconsistent or missing data 5 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 1 ALERT type 5 Informative message, check

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