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Acta Cryst. (2009). E65, o2448  [ doi:10.1107/S1600536809035922 ]

7-Bromo-4-(7-bromo-3,3-dimethyl-1-oxo-2,3,4,9-tetrahydro-1H-xanthen-9-yl)-3,3-dimethyl-2,3-dihydroxanthen-1(4H)-one ethanol solvate

C. Lian, P. Lu and Y. Zhu

Online 12 September 2009

Key indicators

checkCIF/PLATON results

No syntax errors found

Alert level C PLAT244_ALERT_4_C Low 'Solvent' Ueq as Compared to Neighbors of C32
Alert level G REFLT03_ALERT_4_G Please check that the estimate of the number of Friedel pairs is correct. If it is not, please give the correct count in the _publ_section_exptl_refinement section of the submitted CIF. From the CIF: _diffrn_reflns_theta_max 25.50 From the CIF: _reflns_number_total 5155 Count of symmetry unique reflns 2776 Completeness (_total/calc) 185.70% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 2379 Fraction of Friedel pairs measured 0.857 Are heavy atom types Z>Si present yes PLAT033_ALERT_4_G Flack x Parameter Value Deviates from Zero ..... 0.02
0 ALERT level A = In general: serious problem 0 ALERT level B = Potentially serious problem 1 ALERT level C = Check and explain 2 ALERT level G = General alerts; check 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 0 ALERT type 3 Indicator that the structure quality may be low 3 ALERT type 4 Improvement, methodology, query or suggestion 0 ALERT type 5 Informative message, check

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