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Information card for entry 7203966
Preview
| Coordinates | 7203966.cif |
|---|---|
| Original paper (by DOI) | HTML |
| External links | PubChem |
| Formula | C53.5 H35 Cl3 O8 |
|---|---|
| Calculated formula | C53.5 H35 Cl3 O8 |
| Title of publication | Cyclic oligomers of poly(ether ketone) (PEK): synthesis, extraction from polymer, fractionation, and characterisation of the cyclic trimer, tetramer and pentamer |
| Authors of publication | Ben-Haida, Abderrazak; Colquhoun, Howard M.; Hodge, Philip; Williams, David J. |
| Journal of publication | Journal of Materials Chemistry |
| Year of publication | 2000 |
| Journal volume | 10 |
| Journal issue | 9 |
| Pages of publication | 2011 |
| a | 8.7603 ± 0.0005 Å |
| b | 10.1072 ± 0.0005 Å |
| c | 14.0404 ± 0.0008 Å |
| α | 75.262 ± 0.004° |
| β | 73.004 ± 0.005° |
| γ | 80.202 ± 0.004° |
| Cell volume | 1143.57 ± 0.11 Å3 |
| Cell temperature | 293 ± 2 K |
| Ambient diffraction temperature | 293 ± 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 | 0.0815 |
| Residual factor for significantly intense reflections | 0.0609 |
| Weighted residual factors for all reflections | 0.2084 |
| Weighted residual factors for significantly intense reflections | 0.1741 |
| Goodness-of-fit parameter for all reflections | 1.07 |
| Goodness-of-fit parameter for significantly intense reflections | 1.124 |
| Diffraction radiation wavelength | 1.54178 Å |
| Diffraction radiation type | CuKα |
| Has coordinates | Yes |
| Has disorder | Yes |
| 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. |
7203966.cif |
| 176453 | 2016-02-16 | cif/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in range 7. |
7203966.cif |
| 134621 | 2015-04-02 | The 'cif_fix_values' script with an option '--fix-only-weighting-scheme' and 'cif_filter' script were run over CIF files which included an incorrect value of the data item '_refine_ls_weighting_scheme'. Read the log for more details. There were more than 18k CIF files with values to modify. Usually these incorrect values include comment with formulas, but values of this data item must be an enumerator. The script creates new data item '_refine_ls_weighting_details' to store these comments with formulas, and writes the enumerator 'calc' as a value of data item '_refine_ls_weighting_scheme'. There exists some exceptions in the script. |
7203966.cif |
| 120112 | 2014-07-12 | Adding DOIs to range 7 structures. | 7203966.cif |
| 35909 | 2012-02-26 | cif/7/: reorganising range 7 into a prefix-directory tree. | 7203966.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. |
7203966.cif |
| 3890 | 2010-12-07 | cif/7/ Adding CIFs with data extracted from New-J-Chem-2004-2000/, Org-Biomol-Chem-2004-2000/ and RSC-2004-2000/. |
7203966.cif |
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Users of the data should acknowledge the original authors of the
structural data.