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Acta Cryst. (2012). E68, o67-o68  [ doi:10.1107/S1600536811052433 ]

2,2'-[2,4-Bis(naphthalen-1-yl)cyclobutane-1,3-diyl]bis(1-methylpyridinium) diiodide: thermal-induced [2 + 2] cycloaddition reaction of a heterostilbene

S. Chantrapromma, K. Chanawanno, N. Boonnak and H.-K. Fun

Online 10 December 2011


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Alert level C PLAT094_ALERT_2_C Ratio of Maximum / Minimum Residual Density .... 2.24 PLAT410_ALERT_2_C Short Intra H...H Contact H9A .. H12 .. 1.99 Ang. PLAT910_ALERT_3_C Missing # of FCF Reflections Below Th(Min) ..... 1 PLAT912_ALERT_4_C Missing # of FCF Reflections Above STh/L= 0.600 3
Alert level G PLAT005_ALERT_5_G No _iucr_refine_instructions_details in CIF .... ? PLAT164_ALERT_4_G Nr. of Refined C-H H-Atoms in Heavy-Atom Struct. 2 PLAT793_ALERT_4_G The Model has Chirality at C11 (Verify) .... R
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 3 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 1 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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