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Information card for entry 7203097
Preview
| Coordinates | 7203097.cif |
|---|---|
| Original paper (by DOI) | HTML |
| External links | PubChem |
| Common name | Pyrazine-N,N'-dioxide |
|---|---|
| Chemical name | Pyrazine-N,N'-dioxide |
| Formula | C4 H4 N2 O2 |
| Calculated formula | C4 H4 N2 O2 |
| Title of publication | High Z′ polymorphs have shorter C–H⋯O interactions and O–H⋯O hydrogen bonds |
| Authors of publication | Babu, N. Jagadeesh; Nangia, Ashwini |
| Journal of publication | CrystEngComm |
| Year of publication | 2007 |
| Journal volume | 9 |
| Journal issue | 11 |
| Pages of publication | 980 |
| a | 11.8672 ± 0.0018 Å |
| b | 12.2217 ± 0.0019 Å |
| c | 6.4287 ± 0.001 Å |
| α | 90° |
| β | 90° |
| γ | 90° |
| Cell volume | 932.4 ± 0.2 Å3 |
| Cell temperature | 293 ± 2 K |
| Ambient diffraction temperature | 293 ± 2 K |
| Number of distinct elements | 4 |
| Space group number | 62 |
| Hermann-Mauguin space group symbol | P n m a |
| Hall space group symbol | -P 2ac 2n |
| Residual factor for all reflections | 0.0874 |
| Residual factor for significantly intense reflections | 0.0605 |
| Weighted residual factors for significantly intense reflections | 0.1439 |
| Weighted residual factors for all reflections included in the refinement | 0.1584 |
| Goodness-of-fit parameter for all reflections included in the refinement | 1.151 |
| Diffraction radiation wavelength | 0.71073 Å |
| Diffraction radiation type | MoKα |
| Has coordinates | Yes |
| Has disorder | No |
| Has Fobs | No |
| Revision | Date | Message | Files |
|---|---|---|---|
| 301863 (current) | 2025-08-22 | Add cross-references to PubChem compounds in COD range 7/20/ Each referenced PubChem compound corresponds to the full crystal structure. |
7203097.cif |
| 180361 | 2016-03-26 | cif/7/20/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 7/20/30. |
7203097.cif |
| 120112 | 2014-07-12 | Adding DOIs to range 7 structures. | 7203097.cif |
| 35909 | 2012-02-26 | cif/7/: reorganising range 7 into a prefix-directory tree. | 7203097.cif |
| 17004 | 2011-03-31 | cif/ Commiting CIFs, that were updated with the 'cif_fix_values' script, using options '--fix-misspelled replacement_values.lst', '--fix-temperature' and '--fix-enums' with built-in table of enum values. The following cmd was used: > (set -x; find ? -name \*.cif | sort | xargs -i sh -c 'if !( > cif_fix_values --fix-misspelled ~/../inputs/replacament_values.lst {} | > cif_filter --add-cif-header {} | > sponge {} ) 2>&1 | grep NOTE; then svn revert {}; > fi' ) & |
7203097.cif |
| 5312 | 2011-01-03 | cif/ Adding files, updated with the 'cif_fix_enum' program and the cif_core.dic dictionary. The enumerator values were fixed, mostly incorrect case, but also some values that had extra underscores, dashes or spaces. Unfortunately, 22 had non-ASCII characters with the 8-th bit set, and these got incorrectly interpreted as latin1 characters and converted to their UTF8 equivalents by Perl. To fix the structures, however, they need to be redeposited from the original files with the new CIFParser/cif_filter version. |
7203097.cif |
| 1188 | 2010-06-06 | cif/{1,7}/ Adding CIFs from Miguel-Quiros-2010_05, New-J-Chem-2007, Org-Biomol-Chem-2007 and RSC-2007 data extraction directories. |
7203097.cif |
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Users of the data should acknowledge the original authors of the
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