Crystallography Open Database

Information card for entry 2210849

Preview

Coordinates	2210849.cif
Structure factors	2210849.hkl
Original IUCr paper	HTML
External links	ChemSpider

Structure parameters

Common name	Daphnetin
Chemical name	7,8-dihydroxy-2H-chromen-2-one hemihydrate
Formula	C9 H7 O4.5
Calculated formula	C9 H7 O4.5
SMILES	O.o1c(=O)ccc2ccc(O)c(O)c12
Title of publication	Redetermination of 7,8-dihydroxy-2<i>H</i>-chromen-2-one hemihydrate
Authors of publication	Yong-Bin Lu; Qi-Tai Zheng; Yang Lu
Journal of publication	Acta Crystallographica Section E
Year of publication	2006
Journal volume	62
Journal issue	11
Pages of publication	o5315 - o5316
a	22.99 ± 0.003 Å
b	36.609 ± 0.005 Å
c	3.711 ± 0.003 Å
α	90°
β	90°
γ	90°
Cell volume	3123 ± 3 Å³
Cell temperature	298 ± 2 K
Ambient diffraction temperature	298 ± 2 K
Number of distinct elements	3
Space group number	43
Hermann-Mauguin space group symbol	F d d 2
Hall space group symbol	F 2 -2d
Residual factor for all reflections	0.0426
Residual factor for significantly intense reflections	0.0425
Weighted residual factors for significantly intense reflections	0.1103
Weighted residual factors for all reflections included in the refinement	0.1104
Goodness-of-fit parameter for all reflections included in the refinement	1.078
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Has coordinates	Yes
Has disorder	No
Has F_obs	Yes

Version history

Revision	Date	Message	Files
201974 (current)	2017-10-13	cif/2/ Marking COD entries in range 2/21 that are known to be related to ChemSpider entries using the _cod_related_entry data loop.	2210849.cif 2210849.hkl
181028	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 2/21/08.	2210849.cif 2210849.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.	2210849.cif 2210849.hkl
91933	2013-12-28	cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs.	2210849.cif 2210849.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.	2210849.cif 2210849.hkl
32112	2012-02-03	cif/: committing an update of 45+ thous files, with information appended from the originals.	2210849.cif 2210849.hkl
26848	2011-09-28	cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree.	2210849.cif 2210849.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).	2210849.cif 2210849.hkl
26025	2011-09-16	hkl/2/ Adding assigned Fobs files for the 1980-2010 IUCr data.	2210849.cif 2210849.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.	2210849.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.	2210849.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.	2210849.cif