EPSRC National Crystallography Service
Data Collection Summary kccd2 (damien)


Summary report for Directory: home/diska/07skc0026

Report generated Apr 18, 2007; 17:12:12

Unit cell

5433 reflections with 2.91°<theta<27.48° (resolution between 7.00A and 0.77A) were used for unit cell refinement

Symmetry used
in scalepack
p2
a (Angstrom)7.1604 +/- 0.0003
b (Angstrom)12.3314 +/- 0.0006
c (Angstrom)31.3768 +/- 0.0013
alpha (°) 90.000
beta (°)92.970 +/- 0.003
gamma (°) 90.000
Volume (A**3)2766.8 +/- 0.2
Mosaicity (°)0.695 +/- 0.002

Data collection

Summary

Total number of images collected576
Total exposure time133.5 minutes
Data collection exposure time130.8 minutes
Data collection wall-clock time159.1 minutes

Experimental Conditions

Wavelength0.71073 A
Crystal to detector distance43.50 mm

Scans

TypeName# imagesTotal
Rotation
Per frame
Rotation
Exposure
per frame
Used in
scaling
data collections01f268241.2° phi0.900°13 secondsYes
data collections02f29 26.1° omega0.900°13 secondsYes
data collections03f137123.3° omega0.900°13 secondsYes
data collections04f134120.6° omega0.900°13 secondsYes
Phi/Chii01f - i08f820 seconds

Scalepack Scaling

Deleted observations

Rejected 384
Zero sigma or profile test  35
Overload or incomplete profile 828
Sigma cutoff 737
High resolution limit 576

Final Data Set

Scale factor range7.49-12.96
Number of 'full' reflections  2864
Number of 'partial' reflections 23479
Total number of integrated reflections 20241
Total number of unique reflections  6367
Data completeness  97.2%
Resolution range7.00-0.77 A
Theta range2.91°-27.48°
Average Intensity   21.3
Average Sigma(I)    1.4
Overall R-merge (linear)  0.104

Sadabs Results

Parameter refinement on 12416 reflections reduced R(int) from 0.1664 to 0.0608

Before rejection, 26049 reflections total and 6654 unique

After rejection, 21783 reflections total and 6589 unique

Runs

  Run 2-theta  R(int)  Incid. factors  Diffr. factors    K     Total I>2sig(I)
    1   21.1  0.1048   1.375 - 2.169   0.939 - 1.130   2.131   10136    4122
    2   20.5  0.1175   0.167 - 0.194   0.984 - 1.192   2.268    1171     452
    3   20.5  0.0808   0.594 - 0.730   0.939 - 1.092   1.977    4986    2419
    4   20.5  0.0777   0.783 - 0.914   0.940 - 1.072   1.985    5490    2700
Ratio of minimum to maximum apparent transmission: 0.787563

Metadata

  Group    Mike Hursthouse  
  Operator   Sam Callear  
  Sample Owner     
  Local Code   WU maleic&imdzone  
  Formula   C7H10N2O5  
  Crystal Colour    Colourless  
  Crystal Habit    Block  
  Crystal Size   0.12 x 0.04 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 2007/2 (Sheldrick, G.M., 2007)'

_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 APEX II CCD camera on \k-goniostat'
_diffrn_measurement_method          '\f & \w scans'
_diffrn_detector_area_resol_mean   '4096x4096pixels / 62x62mm'

_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. (2007). SADABS. Version 2007/2. 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/