Crystallography Open Database

Information card for entry 7217956

Preview

Coordinates	7217956.cif
Original paper (by DOI)	HTML

Structure parameters

Common name	N-methylurea oxalic acid
Chemical name	N-methylurea ethandioic acid
Formula	C6 H14 N4 O6
Calculated formula	C6 H14 N4 O6
SMILES	C(=O)(C(=O)O)O.C(=O)(NC)N.C(=O)(NC)N
Title of publication	Engineering short, strong hydrogen bonds in urea di-carboxylic acid complexes
Authors of publication	Jones, Andrew O. F.; Leech, Charlotte K.; McIntyre, Garry J.; Wilson, Chick C.; Thomas, Lynne H.
Journal of publication	CrystEngComm
Year of publication	2014
Journal volume	16
Journal issue	35
Pages of publication	8177
a	5.1464 ± 0.0014 Å
b	10.555 ± 0.002 Å
c	10.313 ± 0.003 Å
α	90°
β	101.835 ± 0.013°
γ	90°
Cell volume	548.3 ± 0.2 Å³
Cell temperature	300 K
Ambient diffraction temperature	300 K
Number of distinct elements	4
Space group number	14
Hermann-Mauguin space group symbol	P 1 21/c 1
Hall space group symbol	-P 2ybc
Residual factor for all reflections	0.079
Residual factor for significantly intense reflections	0.0508
Weighted residual factors for significantly intense reflections	0.111
Weighted residual factors for all reflections included in the refinement	0.1231
Goodness-of-fit parameter for all reflections included in the refinement	1.061
Diffraction radiation wavelength	0.71075 Å
Diffraction radiation type	MoKα
Duplicate of	7214491
Has coordinates	Yes
Has disorder	No
Has F_obs	No

Version history

Revision	Date	Message	Files
180510 (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 7/21/79.	7217956.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	7217956.cif
123191	2014-09-07	cif/ Adding structures of 7217942, 7217943, 7217944, 7217945, 7217946, 7217947, 7217948, 7217949, 7217950, 7217951, 7217952, 7217953, 7217954, 7217955, 7217956, 7217957, 7217958, 7217959, 7217960, 7217961, 7217962, 7217963, 7217964, 7217965, 7217966, 7217967, 7217968, 7217969, 7217970, 7217971, 7217972, 7217973, 7217974 via cif-deposit CGI script.	7217956.cif