Crystallography Open Database

Information card for entry 2200608

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Coordinates	2200608.cif
Structure factors	2200608.hkl
Original IUCr paper	HTML
External links	ChemSpider

Structure parameters

Common name	2,6DMP
Chemical name	2,6-dimethylpyrazine
Formula	C6 H8 N2
Calculated formula	C6 H8 N2
SMILES	n1cc(nc(c1)C)C
Title of publication	2,6-Dimethylpyrazine at 20K: a neutron-diffraction study
Authors of publication	Kaiser-Morris, Erika; Nicolaï, Beatrice; Cousson, Alain; Paulus, Werner; Fillaux, Francois
Journal of publication	Acta Crystallographica Section E
Year of publication	2001
Journal volume	57
Journal issue	11
Pages of publication	o1113 - o1115
a	7.288 ± 0.005 Å
b	10.73 ± 0.01 Å
c	7.444 ± 0.007 Å
α	90°
β	90.1 ± 0.08°
γ	90°
Cell volume	582.1 ± 0.9 Å³
Cell temperature	20 K
Number of distinct elements	3
Space group number	14
Hermann-Mauguin space group symbol	P 1 21/a 1
Hall space group symbol	-P 2yab
Residual factor for significantly intense reflections	0.0311
Weighted residual factors for all reflections included in the refinement	0.0186
Goodness-of-fit parameter for all reflections included in the refinement	1.0328
Diffraction radiation probe	neutron
Diffraction radiation wavelength	0.8308 Å
Diffraction radiation type	Neutron
Has coordinates	Yes
Has disorder	No
Has F_obs	Yes

Version history

Revision	Date	Message	Files
201973 (current)	2017-10-13	cif/2/ Marking COD entries in range 2/20 that are known to be related to ChemSpider entries using the _cod_related_entry data loop.	2200608.cif 2200608.hkl
180926	2016-04-02	hkl/2/20/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/20/06.	2200608.cif 2200608.hkl
176774	2016-02-20	cif/2/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/20.	2200608.cif 2200608.hkl
130086	2015-01-23	cod/ (robertas@burundukas) The 'cif_fix_values' program was applied to CIFs that have generated the validation messages containing tag '_exptl_crystal_density_meas'. 16946 CIFs had a values that were perceived as 'not measured' and they were changed to '?'. The total of 17089 CIFs was changed. Those that were not corrected by 'cif_fix_values' were reformatted by the parser (e.g. a doi tag was moved to another place). The processing command was: mysql -u cod_reader -h www.crystallography.net cod -e \ 'select distinct codid from validation \ where message like \ "%tag%_exptl_crystal_density_meas'\''%"' -NB \ \| xargs -i sh -c 'cif_fix_values {} \ \| cif_filter --add-cif-header {} \ \| sponge {}'	2200608.cif 2200608.hkl
106285	2014-03-15	cod/ (saulius@kolibris) Adding the '_diffrn_radiation_probe neutron' data item to those COD CIFs that declared neuron radiation in their _diffrn_radiation_type data field, and did not have a _diffrn_radiation_probe item yet: codsql 'select file from data where radiation is null and radType like "%neutron%"' -NB \ \| codid2file \ \| xargs -i sh -c 'test -f {} && ( set -x; echo _diffrn_radiation_probe neutron >> {} )' Two files that had no newlines at the end were fixed manually.	2200608.cif 2200608.hkl
91933	2013-12-28	cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs.	2200608.cif 2200608.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.	2200608.cif 2200608.hkl
32112	2012-02-03	cif/: committing an update of 45+ thous files, with information appended from the originals.	2200608.cif 2200608.hkl
26848	2011-09-28	cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree.	2200608.cif 2200608.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).	2200608.cif 2200608.hkl
26025	2011-09-16	hkl/2/ Adding assigned Fobs files for the 1980-2010 IUCr data.	2200608.cif 2200608.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.	2200608.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.	2200608.cif
853	2009-11-16	cif/ Reconstructing spacegroup designators from the symmetry operators were possible. The comands used can be found in the log file reformat-spacegroups-2009.11.14.log committed with the current revision. Only lines that contained spacegroup designators were changed, and all files pass vcif test after the conversion.	2200608.cif
19	2008-01-26	Changing all end-of-line codes from DOS style to UNIX style in all COD CIF files, for more convenient processing: In the cod/cif/ directory: ff \*.cif \| xargs perl -i -pe 's/\r\n/\n/'	2200608.cif
14	2008-01-14	Appending a header with SVN keywords, COD URL and copying policy to all COD CIF files.	2200608.cif
13	2008-01-13	Setting the svn:keywords property to "Author Date Revision URL Id" for all CIF files in the cod/cif directory.	2200608.cif
1	2007-11-30	Adding all .cif files from the COD, downloaded in a Cod.zip file on 2007.02.07 (and the same Cod.zip is downloadable today, on 2007.11.29)	2200608.cif