Acta Cryst. (2008). E64, o1056  [ doi:10.1107/S1600536808013366 ]

1-Phenyl-6,7,8,9-hexahydro-1H,5H-cyclohepta[1',2':2,3]pyrido[6,5-c]pyrazol-4-amine: a new tacrine analogue

L. Zhang, D. Shi, J. Li, L. Zhang and Y. Fan

Online 10 May 2008

Key indicators

• Single-crystal X-ray study
• T = 293 K
• Mean (C-C) = 0.004 Å
• R factor = 0.064
• wR factor = 0.163
• Data-to-parameter ratio = 13.6

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT414_ALERT_2_C Short Intra D-H..H-X       H1A    ..  H17B    ..       1.96 Ang. 
PLAT420_ALERT_2_C D-H Without Acceptor       N1     -   H1A    ...          ?      
PLAT066_ALERT_1_C Predicted and Reported Transmissions Identical .          ?
PLAT128_ALERT_4_C Non-standard setting of Space-group P21/c   ....      P21/a      

Alert level G
PLAT199_ALERT_1_G Check the Reported _cell_measurement_temperature        293 K    
PLAT200_ALERT_1_G Check the Reported _diffrn_ambient_temperature .        293 K    

   0 ALERT level A = In general: serious problem
   0 ALERT level B = Potentially serious problem
   4 ALERT level C = Check and explain
   2 ALERT level G = General alerts; check

   3 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
   0 ALERT type 3 Indicator that the structure quality may be low
   1 ALERT type 4 Improvement, methodology, query or suggestion
   0 ALERT type 5 Informative message, check

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