Crystallography Open Database

Information card for entry 2016603

2016602 << 2016603 >> 2016604

Preview

Coordinates	2016603.cif
Structure factors	2016603.hkl
Original IUCr paper	HTML

Structure parameters

Common name	20-Desmethyl-β-carotene
Chemical name	20-nor-β,β-carotene
Formula	C39 H54
Calculated formula	C39 H54
SMILES	CC(=C\C=C\C=C\C=C\C=C(\C=C\C1=C(C)CCCC1(C)C)C)/C=C/C=C(/C=C/C1=C(C)CCCC1(C)C)C
Title of publication	Two polymorphs of 20-desmethyl-β-carotene
Authors of publication	Helliwell, Madeleine; Liaaen-Jensen, Synnøve; Wilkinson, James
Journal of publication	Acta Crystallographica Section C
Year of publication	2008
Journal volume	64
Journal issue	5
Pages of publication	o252 - o256
a	8.5717 ± 0.0013 Å
b	14.089 ± 0.002 Å
c	15.638 ± 0.002 Å
α	111.776 ± 0.002°
β	99.304 ± 0.003°
γ	99.084 ± 0.003°
Cell volume	1681.1 ± 0.4 Å³
Cell temperature	100 ± 2 K
Ambient diffraction temperature	100 ± 2 K
Number of distinct elements	2
Space group number	2
Hermann-Mauguin space group symbol	P -1
Hall space group symbol	-P 1
Residual factor for all reflections	0.0863
Residual factor for significantly intense reflections	0.0521
Weighted residual factors for significantly intense reflections	0.1259
Weighted residual factors for all reflections included in the refinement	0.1419
Goodness-of-fit parameter for all reflections included in the refinement	1.023
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Has coordinates	Yes
Has disorder	Yes
Has F_obs	Yes

Version history

Revision	Date	Message	Files
180835 (current)	2016-04-02	cif/2/01/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/01/66.	2016603.cif 2016603.hkl
176432	2016-02-14	cif/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries.	2016603.cif 2016603.hkl
91933	2013-12-28	cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs.	2016603.cif 2016603.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.	2016603.cif 2016603.hkl
32112	2012-02-03	cif/: committing an update of 45+ thous files, with information appended from the originals.	2016603.cif 2016603.hkl
26848	2011-09-28	cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree.	2016603.cif 2016603.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).	2016603.cif 2016603.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.	2016603.cif 2016603.hkl
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.	2016603.cif 2016603.hkl
903	2009-11-23	cif/ Setting svn:keywords property on those CIFs that did not have them.	2016603.cif 2016603.hkl
697	2009-05-05	Adding 1667 more Fobs files, ones that have cell constans differenig not more than 0.1% from the cell constants in the coordinate file. The symmetry operators must also match in both files.	2016603.cif 2016603.hkl
457	2008-10-13	Depositing files from Acta-Cryst-B-2008_02-04, Acta-Cryst-C-2008_03-08, and personal contributions.	2016603.cif