Crystallography Open Database

Information card for entry 7054323

Preview

Coordinates	7054323.cif
Original paper (by DOI)	HTML

Structure parameters

Common name	Diglycinium squarate
Formula	C8 H12 N2 O8
Calculated formula	C8 H12 N2 O8
SMILES	[NH3+]CC(=O)O.O=C1C([O-])=C([O-])C1=O.O=C(O)C[NH3+]
Title of publication	NH⋯O and OH⋯O interactions of glycine derivatives with squaric acid
Authors of publication	Anioła, Michalina; Dega-Szafran, Zofia; Katrusiak, Andrzej; Szafran, Mirosław
Journal of publication	New Journal of Chemistry
Year of publication	2014
Journal volume	38
Journal issue	8
Pages of publication	3556
a	16.8392 ± 0.0003 Å
b	8.3163 ± 0.0002 Å
c	15.8267 ± 0.0003 Å
α	90°
β	100.063 ± 0.002°
γ	90°
Cell volume	2182.27 ± 0.08 Å³
Cell temperature	296 ± 2 K
Ambient diffraction temperature	296 ± 2 K
Number of distinct elements	4
Space group number	15
Hermann-Mauguin space group symbol	C 1 2/c 1
Hall space group symbol	-C 2yc
Residual factor for all reflections	0.042
Residual factor for significantly intense reflections	0.0382
Weighted residual factors for significantly intense reflections	0.1098
Weighted residual factors for all reflections included in the refinement	0.1159
Goodness-of-fit parameter for all reflections included in the refinement	0.697
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Duplicate of	7054215
Has coordinates	Yes
Has disorder	No
Has F_obs	No

Version history

Revision	Date	Message	Files
176432 (current)	2016-02-14	cif/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries.	7054323.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	7054323.cif
121535	2014-08-07	cif/ Adding structures of 7054323, 7054324, 7054325, 7054326 via cif-deposit CGI script.	7054323.cif