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Acta Cryst. (2012). E68, o158-o159  [ doi:10.1107/S1600536811053220 ]

3,3'-Bis(quinolin-8-yl)-1,1'-[4,4'-methylenebis(4,1-phenylene)]diurea

A. Pramanik, T. H. Russ, D. R. Powell and M. A. Hossain

Online 17 December 2011


Key indicators

checkCIF/PLATON results

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Alert level C PLAT089_ALERT_3_C Poor Data / Parameter Ratio (Zmax .LT. 18) ..... 7.48 PLAT340_ALERT_3_C Low Bond Precision on C-C Bonds ............... 0.0050 Ang PLAT352_ALERT_3_C Short N-H Bond (0.87A) N11A - H11A ... 0.74 Ang. PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 1
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 26.00 From the CIF: _reflns_number_total 5737 Count of symmetry unique reflns 5738 Completeness (_total/calc) 99.98% TEST3: Check Friedels for noncentro structure Estimate of Friedel pairs measured 0 Fraction of Friedel pairs measured 0.000 Are heavy atom types Z>Si present no PLAT005_ALERT_5_G No _iucr_refine_instructions_details in CIF .... ?
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 2 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 4 ALERT type 3 Indicator that the structure quality may be low 1 ALERT type 4 Improvement, methodology, query or suggestion 1 ALERT type 5 Informative message, check

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