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Information card for entry 2212677
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| Coordinates | 2212677.cif |
|---|---|
| Structure factors | 2212677.hkl |
| Original IUCr paper | HTML |
| External links | PubChem |
| Common name | 4,4-bipyridinium oxalate |
|---|---|
| Chemical name | 4,4'-bipyridyl–oxalic acid (1/1) |
| Formula | C12 H10 N2 O4 |
| Calculated formula | C12 H10 N2 O4 |
| SMILES | n1ccc(cc1)c1ccncc1.OC(=O)C(=O)O |
| Title of publication | Short N···O hydrogen bonds in the 1:1 adduct of 4,4'-bipyridyl and oxalic acid |
| Authors of publication | Cowan, John A.; Howard, Judith A. K.; Puschmann, Horst; Williams, Ian D. |
| Journal of publication | Acta Crystallographica Section E |
| Year of publication | 2007 |
| Journal volume | 63 |
| Journal issue | 3 |
| Pages of publication | o1240 - o1242 |
| a | 8.7365 ± 0.0018 Å |
| b | 9.9154 ± 0.0019 Å |
| c | 10.38 ± 0.002 Å |
| α | 100.253 ± 0.01° |
| β | 105.349 ± 0.011° |
| γ | 107.569 ± 0.01° |
| Cell volume | 793.5 ± 0.3 Å3 |
| Cell temperature | 100 ± 2 K |
| Ambient diffraction temperature | 100 ± 2 K |
| Number of distinct elements | 4 |
| Space group number | 2 |
| Hermann-Mauguin space group symbol | P -1 |
| Hall space group symbol | -P 1 |
| Residual factor for all reflections | 0.106 |
| Residual factor for significantly intense reflections | 0.0699 |
| Weighted residual factors for significantly intense reflections | 0.1722 |
| Weighted residual factors for all reflections included in the refinement | 0.193 |
| Goodness-of-fit parameter for all reflections included in the refinement | 1.085 |
| Diffraction radiation wavelength | 0.71073 Å |
| Diffraction radiation type | MoKα |
| Has coordinates | Yes |
| Has disorder | No |
| Has Fobs | Yes |
| Revision | Date | Message | Files |
|---|---|---|---|
| 301804 (current) | 2025-08-19 | Add cross-references to PubChem compounds in COD range 2/21 Each referenced PubChem compound corresponds to the full crystal structure. |
2212677.cif 2212677.hkl |
| 181046 | 2016-04-03 | hkl/2/21/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/21/26. |
2212677.cif 2212677.hkl |
| 176787 | 2016-02-20 | cif/2/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/21. |
2212677.cif 2212677.hkl |
| 91933 | 2013-12-28 | cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs. |
2212677.cif 2212677.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. | 2212677.cif 2212677.hkl |
| 32112 | 2012-02-03 | cif/: committing an update of 45+ thous files, with information appended from the originals. | 2212677.cif 2212677.hkl |
| 31986 | 2012-01-04 | cif/ Changing more tags to match the dictionary specifications: -_diffrn_standards_interval_count none -_diffrn_standards_interval_time none -_diffrn_standards_number none +_diffrn_standards_interval_count 0 +_diffrn_standards_interval_time . +_diffrn_standards_number 0 |
2212677.cif 2212677.hkl |
| 26848 | 2011-09-28 | cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree. |
2212677.cif 2212677.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). |
2212677.cif 2212677.hkl |
| 26025 | 2011-09-16 | hkl/2/ Adding assigned Fobs files for the 1980-2010 IUCr data. |
2212677.cif 2212677.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. |
2212677.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. |
2212677.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. |
2212677.cif |
| 326 | 2008-04-03 | Adding all Acta Cryst. B, C, and E missing retrospective CIF files up to 2008 February, generated from the files that were automatically downloaded from the IUCr site. |
2212677.cif |
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