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Information card for entry 2011780
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| Coordinates | 2011780.cif |
|---|---|
| Structure factors | 2011780.hkl |
| Original IUCr paper | HTML |
| External links | ChemSpider |
| Chemical name | 6,7-dicyano-2,3-di(2-pyridyl) pyrazine |
|---|---|
| Formula | C16 H8 N6 |
| Calculated formula | C16 H8 N6 |
| SMILES | N#Cc1nc(c(nc1C#N)c1ncccc1)c1ncccc1 |
| Title of publication | 5,6-Bis(2-pyridyl)-2,3-pyrazinedicarbonitrile |
| Authors of publication | Du, Miao; Bu, Xian-He; Liu, He; Leng, Xue-Bing |
| Journal of publication | Acta Crystallographica Section C |
| Year of publication | 2001 |
| Journal volume | 57 |
| Journal issue | 2 |
| Pages of publication | 201 - 202 |
| a | 16.996 ± 0.002 Å |
| b | 8.1356 ± 0.0011 Å |
| c | 20.66 ± 0.003 Å |
| α | 90° |
| β | 90° |
| γ | 90° |
| Cell volume | 2856.7 ± 0.7 Å3 |
| Cell temperature | 298 ± 2 K |
| Number of distinct elements | 3 |
| Space group number | 33 |
| Hermann-Mauguin space group symbol | P n a 21 |
| Hall space group symbol | P 2c -2n |
| Residual factor for significantly intense reflections | 0.0367 |
| Weighted residual factors for all reflections included in the refinement | 0.1013 |
| Goodness-of-fit parameter for all reflections included in the refinement | 0.983 |
| Diffraction radiation wavelength | 0.71073 Å |
| Diffraction radiation type | MoKα |
| Has coordinates | Yes |
| Has disorder | No |
| Has Fobs | Yes |
| Revision | Date | Message | Files |
|---|---|---|---|
| 201957 (current) | 2017-10-13 | cif/2/ Marking COD entries in range 2/01 that are known to be related to ChemSpider entries using the _cod_related_entry data loop. |
2011780.cif 2011780.hkl |
| 180786 | 2016-04-02 | cif/2/01/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/01/17. |
2011780.cif 2011780.hkl |
| 176760 | 2016-02-20 | cif/2/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/01. |
2011780.cif 2011780.hkl |
| 130086 | 2015-01-23 | cod/ (robertas@burundukas) The 'cif_fix_values' program was applied to CIFs that have generated the validation messages containing tag '_exptl_crystal_density_meas'. 16946 CIFs had a values that were perceived as 'not measured' and they were changed to '?'. The total of 17089 CIFs was changed. Those that were not corrected by 'cif_fix_values' were reformatted by the parser (e.g. a doi tag was moved to another place). The processing command was: mysql -u cod_reader -h www.crystallography.net cod -e \ 'select distinct codid from validation \ where message like \ "%tag%_exptl_crystal_density_meas'\''%"' -NB \ | xargs -i sh -c 'cif_fix_values {} \ | cif_filter --add-cif-header {} \ | sponge {}' |
2011780.cif 2011780.hkl |
| 91933 | 2013-12-28 | cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs. |
2011780.cif 2011780.hkl |
| 88064 | 2013-08-29 | Adding _cod_database_fobs_code data item to all COD CIFs that have Fobs deposited and did not have this data item yet. | 2011780.cif 2011780.hkl |
| 32112 | 2012-02-03 | cif/: committing an update of 45+ thous files, with information appended from the originals. | 2011780.cif 2011780.hkl |
| 26848 | 2011-09-28 | cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree. |
2011780.cif 2011780.hkl |
| 26029 | 2011-09-17 | cif/2/ Reverting changes of revision 25271: ( cd cif/2/; svn merge -r25271:25270 . ) The problem was that the reprocessed files from IUCr, although were more complete, "resurrected" data errors that were corrected in the previous recisions. The additional data that have been extracted during the reprocessing will have to be merged without overwriting the existing values in COD files, except some explicit and controlled cases (such as publication titles and chemical names). |
2011780.cif 2011780.hkl |
| 26025 | 2011-09-16 | hkl/2/ Adding assigned Fobs files for the 1980-2010 IUCr data. |
2011780.cif 2011780.hkl |
| 25271 | 2011-09-10 | cif/2/ Adding reporocessed IUCr CIFs for the years 1980-2010. The CIFs now contain more complete bibliography, substance names, correctly unfolded text fields (using the CIF line unfolding protocol), explicitely set cell angles, and _cod_data_source_block fields. |
2011780.cif |
| 5310 | 2011-01-02 | cif/ Running cif_fix_enum with the core CIF dictionary on COD ranges 2, 8 and 9. Range 9 remained unchanged, and in ranges 2 and 8 there were 17309 modified files, most changes were fixes enumerator case. |
2011780.cif |
| 966 | 2010-01-30 | cif/ Adding _cod_database_code tags to all COD entries. Adding tag description to the cif_cod.dic dictionary so that COD entries can be validated. |
2011780.cif |
| 19 | 2008-01-26 | Changing all end-of-line codes from DOS style to UNIX style in all COD CIF files, for more convenient processing: In the cod/cif/ directory: ff \*.cif | xargs perl -i -pe 's/\r\n/\n/' |
2011780.cif |
| 14 | 2008-01-14 | Appending a header with SVN keywords, COD URL and copying policy to all COD CIF files. |
2011780.cif |
| 13 | 2008-01-13 | Setting the svn:keywords property to "Author Date Revision URL Id" for all CIF files in the cod/cif directory. |
2011780.cif |
| 1 | 2007-11-30 | Adding all .cif files from the COD, downloaded in a Cod.zip file on 2007.02.07 (and the same Cod.zip is downloadable today, on 2007.11.29) |
2011780.cif |
All data in the COD and the database itself are dedicated to the
public domain and licensed under the
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Users of the data should acknowledge the original authors of the
structural data.