[Open access]

[Contents scheme]

Acta Cryst. (2013). E69, o1542
[ doi:10.1107/S1600536813025026 ]

9-[(E)-2-(4-Chlorophenyl)ethenyl]-3,3,6,6-tetramethyl-2,3,4,5,6,7,8,9-octahydro-1H-xanthene-1,8-dione

B.-Y. Yu, J. K. Lee, Y. S. Cho, S.-J. Min and J. C. Woo


Key indicators

checkCIF/PLATON results

No syntax errors found




Alert level C PLAT230_ALERT_2_C Hirshfeld Test Diff for C5 -- C22 .. 6.0 su PLAT242_ALERT_2_C Check Low Ueq as Compared to Neighbors for C5 PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 5.964 PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 5
Alert level G PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? Do ! PLAT128_ALERT_4_G Note: Alternate Setting of Space-group P21/c . P21/n PLAT793_ALERT_4_G The Model has Chirality at C1 (Verify) .... R PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L= 0.600 22
0 ALERT level A = Most likely a serious problem - resolve or explain 0 ALERT level B = A potentially serious problem, consider carefully 4 ALERT level C = Check. Ensure it is not caused by an omission or oversight 4 ALERT level G = General information/check it is not something unexpected 0 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 2 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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