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Information card for entry 2203174
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| Coordinates | 2203174.cif |
|---|---|
| Structure factors | 2203174.hkl |
| Original IUCr paper | HTML |
| External links | ChemSpider |
| Formula | C18 H16 N6 O2 |
|---|---|
| Calculated formula | C18 H16 N6 O2 |
| SMILES | O=C(NCc1ncccc1)c1nccnc1C(=O)NCc1ncccc1 |
| Title of publication | An orthorhombic polymorph of <i>N</i>,<i>N</i>'-bis(2-pyridylmethyl)pyrazine-2,3-dicarboxamide |
| Authors of publication | Dilovan S. Cati; Helen Stoeckli-Evans |
| Journal of publication | Acta Crystallographica Section E |
| Year of publication | 2004 |
| Journal volume | 60 |
| Journal issue | 2 |
| Pages of publication | o210 - o212 |
| a | 8.5131 ± 0.0006 Å |
| b | 31.862 ± 0.002 Å |
| c | 12.1757 ± 0.0006 Å |
| α | 90° |
| β | 90° |
| γ | 90° |
| Cell volume | 3302.6 ± 0.4 Å3 |
| Cell temperature | 153 K |
| Ambient diffraction temperature | 153 K |
| Number of distinct elements | 4 |
| Space group number | 61 |
| Hermann-Mauguin space group symbol | P b c a |
| Hall space group symbol | -P 2ac 2ab |
| Residual factor for all reflections | 0.0437 |
| Residual factor for significantly intense reflections | 0.0315 |
| Weighted residual factors for significantly intense reflections | 0.0744 |
| Weighted residual factors for all reflections included in the refinement | 0.0785 |
| Goodness-of-fit parameter for all reflections included in the refinement | 1.033 |
| Diffraction radiation wavelength | 0.71073 Å |
| Diffraction radiation type | MoKα |
| Has coordinates | Yes |
| Has disorder | No |
| Has Fobs | Yes |
| Revision | Date | Message | Files |
|---|---|---|---|
| 201973 (current) | 2017-10-13 | cif/2/ Marking COD entries in range 2/20 that are known to be related to ChemSpider entries using the _cod_related_entry data loop. |
2203174.cif 2203174.hkl |
| 180951 | 2016-04-03 | hkl/2/20/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/20/31. |
2203174.cif 2203174.hkl |
| 176774 | 2016-02-20 | cif/2/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/20. |
2203174.cif 2203174.hkl |
| 91933 | 2013-12-28 | cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs. |
2203174.cif 2203174.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. | 2203174.cif 2203174.hkl |
| 32112 | 2012-02-03 | cif/: committing an update of 45+ thous files, with information appended from the originals. | 2203174.cif 2203174.hkl |
| 26848 | 2011-09-28 | cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree. |
2203174.cif 2203174.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). |
2203174.cif 2203174.hkl |
| 26025 | 2011-09-16 | hkl/2/ Adding assigned Fobs files for the 1980-2010 IUCr data. |
2203174.cif 2203174.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. |
2203174.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. |
2203174.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. |
2203174.cif |
| 321 | 2008-03-30 | Changing the COD CIF files header (comments) in all files that were recently deposited from the IUCr autodownloaded sources to the text agreed with IUCr. |
2203174.cif |
| 30 | 2008-01-27 | Adding the reprocessed files from my first COD deposition. Reprocessing with the new cif-tools scripts removed missing tags and added Acta Cryst. Coeditor codes into those files where the corresponding CIF tag was present. Not all reprocessed files were changed. Alsin two entries, cif/8/8000061.cif and cif/8/8000065.cif, were removed manually, both from the CIF file directory and from the cif2cod.txt file, since these two files were detected to be duplicates. |
2203174.cif |
| 14 | 2008-01-14 | Appending a header with SVN keywords, COD URL and copying policy to all COD CIF files. |
2203174.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. |
2203174.cif |
| 5 | 2008-01-03 | Adding 507 CIF files deposited into COD today, on 2008.01.03. |
2203174.cif |
All data in the COD and the database itself are dedicated to the
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Users of the data should acknowledge the original authors of the
structural data.