(IUCr) Crystallography Journals Online checkcif report

[Contents scheme]

Acta Cryst. (2005). E61, o2175-o2176 [ doi:10.1107/S1600536805018349 ]

syn-exo-4,7-Bis(trimethylsilyl)-4,7-dihydro[2.2]paracyclophane

P. G. Jones, P. Bubenitschek, H. Hopf and R. Savinsky

Online 17 June 2005

Key indicators

Single-crystal X-ray study
T = 173 K
Mean (C-C) = 0.005 Å
R factor = 0.055
wR factor = 0.164
Data-to-parameter ratio = 17.3

checkCIF/PLATON results

No syntax errors found




Alert level C
PLAT063_ALERT_3_C Crystal Probably too Large for Beam Size .......       0.70 mm    
PLAT125_ALERT_4_C No _symmetry_space_group_name_Hall Given .......          ?
PLAT220_ALERT_2_C Large Non-Solvent    C     Ueq(max)/Ueq(min) ...       2.90 Ratio 
PLAT242_ALERT_2_C Check Low       Ueq as Compared to Neighbors for       Si2'     
PLAT340_ALERT_3_C Low Bond Precision on C-C bonds (x 1000) Ang ...          5       
PLAT720_ALERT_4_C Number of Unusual/Non-Standard Label(s) ........          6       

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

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