[Open access]

[Contents scheme]

Acta Cryst. (2013). E69, o99
[ doi:10.1107/S1600536812050581 ]

rac-Ethyl 2-hydroxy-2,7,7-trimethyl-4-(4-nitrophenyl)-5-oxo-3,4,5,6,7,8-hexahydro-2H-chromene-3-carboxylate

A. M. Maharramov, A. I. Ismiev, B. A. Rashidov, R. K. Askerov and K. A. Potekhin


Key indicators

checkCIF/PLATON results

No syntax errors found




Alert level C PLAT906_ALERT_3_C Large K value in the Analysis of Variance ...... 2.386
Alert level G PLAT005_ALERT_5_G No _iucr_refine_instructions_details in the CIF ? PLAT793_ALERT_4_G The Model has Chirality at C1 (Verify) .... R PLAT793_ALERT_4_G The Model has Chirality at C2 (Verify) .... S PLAT793_ALERT_4_G The Model has Chirality at C3 (Verify) .... R PLAT912_ALERT_4_G Missing # of FCF Reflections Above STh/L= 0.600 8
0 ALERT level A = Most likely a serious problem - resolve or explain 0 ALERT level B = A potentially serious problem, consider carefully 1 ALERT level C = Check. Ensure it is not caused by an omission or oversight 5 ALERT level G = General information/check it is not something unexpected 0 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 1 ALERT type 3 Indicator that the structure quality may be low 4 ALERT type 4 Improvement, methodology, query or suggestion 1 ALERT type 5 Informative message, check

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