Crystallography Open Database

Information card for entry 7217373

Preview

Coordinates	7217373.cif
Original paper (by DOI)	HTML

Structure parameters

Formula	C16 H18 N2 O4
Calculated formula	C16 H18 N2 O4
Title of publication	Hydrogen-bonding patterns in a series of multi-component molecular solids formed by 2,3,5,6-tetramethylpyrazine with selected carboxylic acids
Authors of publication	Wang, Lei; Xue, Ruiyu; Li, Yuanxin; Zhao, Yiran; Liu, Faqian; Huang, Keke
Journal of publication	CrystEngComm
Year of publication	2014
Journal volume	16
Journal issue	30
Pages of publication	7074
a	7.5343 ± 0.0014 Å
b	8.9454 ± 0.0017 Å
c	12.885 ± 0.003 Å
α	99.769 ± 0.004°
β	103.689 ± 0.004°
γ	108.465 ± 0.003°
Cell volume	771.6 ± 0.3 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	0.0967
Residual factor for significantly intense reflections	0.0873
Weighted residual factors for significantly intense reflections	0.2292
Weighted residual factors for all reflections included in the refinement	0.2474
Goodness-of-fit parameter for all reflections included in the refinement	1.053
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Duplicate of	7215858
Has coordinates	Yes
Has disorder	No
Has F_obs	No

Version history

Revision	Date	Message	Files
180504 (current)	2016-03-26	cif/7/21/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 7/21/73.	7217373.cif
124581	2014-10-05	cif/ (saulius@koala.ibt.lt) Marking up 890 duplicates of COD. The duplicates were indentified as entries havin identical DOIs, cell length parameters and formulae, unspecified or identical RI R-factors, and not already marked as duplicates or suboptimal structures. Furthermore, coordinates had to be identical when comparing results of cif2ref conversion: codsql \ 'select d1.file, d1.doi, d2.file, d2.doi from data as d1 join data as d2 on d1.doi = d2.doi where d1.a = d2.a and d1.b = d2.b and d1.c = d2.c and d1.duplicateof is null and d2.duplicateof is null and d1.optimal is null and d2.optimal is null and (d1.RI is null or d2.RI is null or d1.RI = d2.RI) and d1.file > d2.file and (d1.formula = d2.formula or d1.calcformula = d2.calcformula)' \ -NB \ \| awk '{print $1, $3}' \ \| xargs codid2file \ \| xargs -n2 \ \| xargs -i bash -c ' \ CIF1=$(echo {} \| awk "{print \$1}"); \ CIF2=$(echo {} \| awk "{print \$2}"); \ echo -e "\n=== {} ==="; \ diff -bw -u <(cif2ref $CIF1) <(cif2ref $CIF2)' \ \| perl -00 -ne 'print unless /^(-\|\+)/m' \ \| grep . > ~/duplicates-2014-10-05.lst The resulting '~/duplicates-2014-10-05.lst' was post-processed as follows: awk '{print $2, $3}' duplicates-2014-10-05.lst \ \| xargs -i bash -c ' \ ID2=$(basename $(echo {} \| awk "{print \$2}") .cif); \ CIF1=$(echo {} \| awk "{print \$1}"); \ set -x; echo _cod_duplicate_entry $ID2 >> $CIF1' Structures from one powder diffraction paper were reverted: svn revert /home/saulius/struct/cod/cif/4/12/19/412199[567].cif And two files with more than one duplicate identified were fixed by hand: emacs -nw /home/saulius/struct/cod/cif/7/05/43/7054322.cif emacs -nw /home/saulius/struct/cod/cif/7/05/43/7054325.cif	7217373.cif
121444	2014-08-06	cif/ Adding structures of 7217368, 7217369, 7217370, 7217371, 7217372, 7217373, 7217374, 7217375 via cif-deposit CGI script.	7217373.cif