[Open access]

[Contents scheme]

Acta Cryst. (2013). E69, o754
[ doi:10.1107/S1600536813010210 ]

3,4-Dihydro-1H-benzo[c]chromene-1,6(2H)-dione

L.-Y. Cui, Y. He and X.-S. Fan


Key indicators

checkCIF/PLATON results

No syntax errors found




Alert level B PLAT930_ALERT_2_B Check Twin Law ( 0 0 1)[ 1 0 5] Estimated BASF 0.25 PLAT934_ALERT_3_B Number of (Iobs-Icalc)/SigmaW .gt. 10 Outliers . 2
Alert level C PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds ............... 0.0060 Ang PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 16.374 PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 2.110 PLAT911_ALERT_3_C Missing # FCF Refl Between THmin & STh/L= 0.600 5
Alert level G PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? PLAT870_ALERT_4_G ALERTS Related to Twinning Effects Suppressed .. ! PLAT870_ALERT_4_G ALERTS Related to Twinning Effects Suppressed .. ! PLAT931_ALERT_5_G Check Twin Law ( 0 0 1)[ ] Estimated BASF 0.25
0 ALERT level A = Most likely a serious problem - resolve or explain 2 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 1 ALERT type 2 Indicator that the structure model may be wrong or deficient 5 ALERT type 3 Indicator that the structure quality may be low 2 ALERT type 4 Improvement, methodology, query or suggestion 2 ALERT type 5 Informative message, check

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