EPSRC National Crystallography Service
Data Collection Summary kccd2 (damien)


Summary report for Directory: home/diska/06skc0010

Report generated Mar 17, 2006; 08:20:39

Unit cell

1597 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)13.005 +/- 0.004
b (Angstrom)3.8094 +/- 0.0012
c (Angstrom)14.397 +/- 0.003
alpha (°) 90.000
beta (°) 90.037
gamma (°) 90.000
Volume (A**3)713.2 +/- 0.3
Mosaicity (°)1.978 +/- 0.010

Data collection

Summary

Total number of images collected252
Total exposure time8.3 hours
Data collection exposure time8.1 hours
Data collection wall-clock time8.4 hours

Experimental Conditions

Wavelength0.71073 A
Crystal to detector distance33.00 mm

Scans

TypeName# imagesTotal
Rotation
Per frame
Rotation
Exposure
per frame
Used in
scaling
data collections01f178356.0° phi2.000°120 secondsYes
data collections02f16 32.0° omega2.000°120 secondsYes
data collections03f25 50.0° omega2.000°120 secondsYes
data collections04f25 50.0° omega2.000°120 secondsYes
Phi/Chii01f - i08f860 seconds

Scalepack Scaling

Deleted observations

Rejected 316
Zero sigma or profile test4539
Overload or incomplete profile1320
Sigma cutoff2227
High resolution limit 773

Final Data Set

Scale factor range1.94-10.02
Number of 'full' reflections    11
Number of 'partial' reflections 10529
Total number of integrated reflections  8461
Total number of unique reflections  1816
Data completeness  89.0%
Resolution range7.00-0.77 A
Theta range2.91°-27.48°
Average Intensity   10.1
Average Sigma(I)    2.2
Overall R-merge (linear)  0.343

Sadabs Results

Parameter refinement on 2671 reflections reduced R(int) from 0.1936 to 0.0886

Before rejection, 8937 reflections total and 1881 unique

After rejection, 8430 reflections total and 1871 unique

Runs

  Run 2-theta  R(int)  Incid. factors  Diffr. factors    K     Total I>2sig(I)
    1   10.1  0.2485   0.728 - 0.971   0.731 - 2.315   1.399    7184    2731
    2   -9.6  0.3271   0.631 - 0.716   0.823 - 1.860   1.487     554     203
    3   -9.6  1.0471   2.207 - 3.313   0.623 - 9.622   1.540     307      31
    4   -9.6  0.8915   1.155 - 2.386   0.658 - 3.928   1.648     385      19
Ratio of minimum to maximum apparent transmission: 0.064763

Metadata

  Group    Mike Hursthouse  
  Operator   Sam Callear  
  Sample Owner     
  Local Code   2Me3NO2an meoh50sol  
  Formula   C7H8N2O2  
  Crystal Colour    Yellow  
  Crystal Habit    Plate  
  Crystal Size   0.09 x 0.08 x 0.01 (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/