EPSRC National Crystallography Service
Data Collection Summary kccd1 (dellboy)


Summary report for Directory: diska/2007src0325

Report generated Mar 15, 2007; 08:23:00

Unit cell

3121 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)11.0751 +/- 0.0002
b (Angstrom)4.94400 +/- 0.00010
c (Angstrom)22.8469 +/- 0.0005
alpha (°) 90.000
beta (°)97.5562 +/- 0.0011
gamma (°) 90.000
Volume (A**3)1240.13 +/- 0.04
Mosaicity (°)0.3460 +/- 0.0010

Data collection

Summary

Total number of images collected447
Total exposure time9.8 hours
Data collection exposure time9.8 hours
Data collection wall-clock time10.4 hours

Experimental Conditions

Wavelength0.71073 A
Crystal to detector distance30.00 mm

Scans

TypeName# imagesTotal
Rotation
Per frame
Rotation
Exposure
per frame
Used in
scaling
data collections01f226226.0° phi1.000°80 secondsYes
data collections02f33 33.0° omega1.000°80 secondsYes
data collections03f70 70.0° omega1.000°80 secondsYes
data collections04f110110.0° omega1.000°80 secondsYes
Phi/Chii01f - i08f820 seconds

Scalepack Scaling

Deleted observations

Rejected  57
Zero sigma or profile test   2
Overload or incomplete profile 528
Sigma cutoff  52
High resolution limit  16

Final Data Set

Scale factor range10.00-14.47
Number of 'full' reflections 10384
Number of 'partial' reflections 10041
Total number of integrated reflections 19218
Total number of unique reflections  3184
Data completeness  99.8%
Resolution range7.00-0.77 A
Theta range2.91°-27.48°
Average Intensity   58.3
Average Sigma(I)    2.0
Overall R-merge (linear)  0.058

Sadabs Results

Parameter refinement on 12247 reflections reduced R(int) from 0.0941 to 0.0457

Before rejection, 19793 reflections total and 3193 unique

After rejection, 19578 reflections total and 3191 unique

Runs

  Run 2-theta  R(int)  Incid. factors  Diffr. factors    K     Total I>2sig(I)
    1    7.4  0.0601   0.838 - 1.012   0.923 - 1.319   1.191   10040    6632
    2   -6.8  0.0572   0.672 - 0.748   0.981 - 1.243   1.152    1431     992
    3   -6.8  0.0575   0.603 - 0.793   0.902 - 1.281   1.121    3091    2148
    4    4.8  0.0506   0.847 - 1.230   0.894 - 1.212   1.183    5016    3432
Ratio of minimum to maximum apparent transmission: 0.677578

Metadata

  Group    Service  
  Operator   Simon Coles  
  Sample Owner   Blagden  
  Local Code   DbSN11  
  Formula   C6H6N2O  
  Crystal Colour    Colourless  
  Crystal Habit    Blade  
  Crystal Size   0.45 x 0.03 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    'graphite'
_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/