(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2004). E60, o547-o549 [ doi:10.1107/S1600536804004969 ]

1'-Methyl-4'-phenylacenaphthene-1-spiro-2'-pyrrolidine-3'-spiro-2''-indan-2,1'',3''-trione

M. M. Govind, S. Selvanayagam, D. Velmurugan, K. Ravikumar, A. R. Sureshbabu and R. Raghunathan

Online 20 March 2004

Key indicators

Single-crystal X-ray study
T = 293 K
Mean (C-C) = 0.003 Å
R factor = 0.052
wR factor = 0.151
Data-to-parameter ratio = 14.6

checkCIF/PLATON results

No syntax errors found



Alert level A
PLAT029_ALERT_3_A _diffrn_measured_fraction_theta_full Low .......       0.91       

Alert level C
WEIGH01_ALERT_1_C  Extra text has been found in the
            _refine_ls_weighting_scheme field. This should be in the
            _refine_ls_weighting_details field.
            Weighting scheme given as calc w=1/[\s^2^(Fo^2^)+(0.0889P)^2^+0.1654P]
            Weighting scheme identified as calc
PLAT125_ALERT_4_C No _symmetry_space_group_name_Hall Given .......          ?

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

   1 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
   1 ALERT type 3 Indicator that the structure quality may be low
   1 ALERT type 4 Improvement, methodology, query or suggestion