EPSRC National Crystallography Service
Data Collection Summary kccd2 (damien)


Summary report for Directory: home/diska/04src0845

Report generated Oct 06, 2004; 13:06:02

Unit cell

4247 reflections with 2.91°<theta<27.48° (resolution between 7.00A and 0.77A) were used for unit cell refinement

Symmetry used
in scalepack
p1
a (Angstrom)6.7423 +/- 0.0002
b (Angstrom)11.8006 +/- 0.0004
c (Angstrom)11.9563 +/- 0.0004
alpha (°)87.720 +/- 0.002
beta (°)86.640 +/- 0.002
gamma (°)81.468 +/- 0.002
Volume (A**3)938.67 +/- 0.05
Mosaicity (°)0.716 +/- 0.002

Data collection

Summary

Total number of images collected354
Total exposure time177.0 minutes
Data collection exposure time174.3 minutes
Data collection wall-clock time203.2 minutes

Experimental Conditions

Wavelength0.71073 A
Crystal to detector distance32.00 mm

Scans

TypeName# imagesTotal
Rotation
Per frame
Rotation
Exposure
per frame
Used in
scaling
data collections01f181362.0° phi2.000°30 secondsYes
data collections02f56112.0° omega2.000°30 secondsYes
data collections03f55110.0° omega2.000°30 secondsYes
data collections04f54108.0° omega2.000°30 secondsYes
Phi/Chii01f - i08f820 seconds

Scalepack Scaling

Deleted observations

Rejected  86
Overload or incomplete profile 792
Sigma cutoff  26
High resolution limit 141

Final Data Set

Scale factor range3.96-11.65
Number of 'full' reflections 11240
Number of 'partial' reflections 11124
Total number of integrated reflections 21407
Total number of unique reflections  4297
Data completeness 100.0%
Resolution range7.00-0.77 A
Theta range2.91°-27.48°
Average Intensity   74.7
Average Sigma(I)    3.0
Overall R-merge (linear)  0.072

Sadabs Results

Parameter refinement on 15867 reflections reduced R(int) from 0.2303 to 0.0531

Before rejection, 21424 reflections total and 4354 unique

After rejection, 21131 reflections total and 4354 unique

Runs

  Run 2-theta  R(int)  Incid. factors  Diffr. factors    K     Total I>2sig(I)
    1    9.3  0.0657   0.589 - 2.173   0.922 - 1.204   1.409   10987    8531
    2   -8.7  0.0623   0.843 - 1.180   0.913 - 1.108   1.423    3463    2699
    3   -8.7  0.0604   0.814 - 1.541   0.920 - 1.095   1.391    3373    2568
    4   -8.7  0.0607   0.452 - 0.668   0.913 - 1.215   1.369    3308    2591
Ratio of minimum to maximum apparent transmission: 0.751461

Metadata

  Group    Service  
  Operator   Peter Horton  
  Sample Owner   Dr. I. R. Butler  
  Local Code   Yellow 1  
  Formula   C20 H18 N1 O2 Br1 Si1  
  Crystal Colour    White  
  Crystal Habit    Needle  
  Crystal Size   0.2 x 0.06 x 0.02 (mm3) 
  Temperature   120(K) 
  Generator   50 (kV)   85 (mA) 
  Primary Solvent     
  Other Solvents     

File Explanations

SampleCode.zip
      SampleCode.hkl - data corrected using  SADABS
      SampleCode_merge_none.hkl - equivalents and friedels kept separate  (See "Final Data Set" table in this report)
      SampleCode.p4p - skeleton p4p file for use with XPREP
      SampleCode.htm - this summary file


Southampton CIF entry fields

_exptl_absorpt_process_details       'SADABS V2.10 (Sheldrick, G.M., 2003)'

_diffrn_ambient_temperature           120(2)
_diffrn_radiation_wavelength           0.71073
_diffrn_radiation_type                      MoK\a
_diffrn_radiation_source                  'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_monochromator    '10cm confocal mirrors'
_diffrn_measurement_device_type  'Bruker-Nonius 95mm CCD camera on \k-goniostat'
_diffrn_measurement_method          '\f & \w scans'
_diffrn_detector_area_resol_mean   9.091

_computing_data_collection        
'COLLECT (Hooft, R.W.W., 1998)'
_computing_cell_refinement        
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
#Although determined using DirAx, the cell is refined in the HKL
#package during data reduction
_computing_data_reduction         
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)' 

Software References

Unit Cell Determination using DirAx:
Duisenberg AJM. Indexing in Single-Crystal Diffractometry with an Obstinate List of Reflections. Journal of Applied Crystallography 1992; 25: 92-96.
Duisenberg AJM, Hooft RWW, Schreurs AMM, Kroon J. Accurate cells from area-detector images. Journal of Applied Crystallography 2000; 33: 893-898.

Diffractometer control and strategy calculation using COLLECT:
Hooft RWW. COLLECT data collection software, Nonius B.V., 1998.

Standard Data Reduction using HKL(Denzo & Scalepack):
Otwinowski Z, Minor W. Processing of X-ray diffraction data collected in oscillation mode. Macromolecular Crystallography, Pt A. 1997; 276: 307-326.

Absorption Correction
Sheldrick, G. M. (2003). SADABS. Version 2.10. Bruker AXS Inc., Madison, Wisconsin, USA.

Non-Standard Data Reduction using EvalCCD:
Duisenberg AJM, Kroon-Batenburg LMJ, Schreurs AMM. An intensity evaluation method: EVAL-14. Journal of Applied Crystallography 2003; 36: 220-229.

For more information visit the service web site at: http://www.soton.ac.uk/~xservice/