Acta Cryst. (2001). E57, o358-o359  [ doi:10.1107/S1600536801004755 ]

2-Amino-7,7-dimethyl-5-oxo-4-phenyl-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile

S.-J. Tu, X. Deng, Y.-Y. Fang, Y.-M. Guo, M. Du and X.-H. Liu

Key indicators

• Single-crystal X-ray study
• T = 296 K
• Mean (C-C) = 0.002 Å
• R factor = 0.038
• wR factor = 0.102
• Data-to-parameter ratio = 13.4

checkCIF results

No syntax errors found

ADDSYM reports no extra symmetry


 Alert Level C:



PLAT_371  Alert C Long   C(sp2)-C(sp1) Bond  C(8)   -   C(16)  =       1.41 Ang.


 0 Alert Level A = Potentially serious problem

 0 Alert Level B = Potential problem

 1 Alert Level C = Please check

Copyright © International Union of Crystallography
IUCr Webmaster