Crystallography Open Database

Information card for entry 2003171

2003170 << 2003171 >> 2003172

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Coordinates	2003171.cif
Original IUCr paper	HTML

Structure parameters

Formula	C15 H23 N2 O3
Calculated formula	C15 H23 N2 O3
Title of publication	Piperidine Nitroxide Radicals with Heterocyclic Ring Substituents. 4-Hydroxy-2,2,6,6-tetramethyl-4-(2-pyridylmethyl 1-oxide)piperidine 1-Oxide
Authors of publication	Tomasz A. Olszak; Piotr H. Sobczynski; Andrzej M. Brzozowski; Mieczyslaw J. Grabowski; Krzysztof Gwozdzinski
Journal of publication	Acta Crystallographica C
Year of publication	1995
Journal volume	51
Journal issue	1
Pages of publication	121 - 123
a	6.4 ± 0.001 Å
b	10.767 ± 0.001 Å
c	11.203 ± 0.002 Å
α	91.62 ± 0.01°
β	91.34 ± 0.02°
γ	102.2 ± 0.2°
Cell volume	753.9 ± 0.2 Å³
Cell temperature	295 ± 2 K
Number of distinct elements	4
Space group number	2
Hermann-Mauguin space group symbol	P -1
Hall space group symbol	-P 1
Diffraction radiation wavelength	1.54178 Å
Diffraction radiation type	CuKα
Has coordinates	Yes
Has disorder	No
Has F_obs	No

Version history

Revision	Date	Message	Files
208360 (current)	2018-06-14	cif/ Updating space group information and adding the symmetry operation list in 156 entries.	2003171.cif
130149	2015-01-27	cod/ (saulius@kolibris) Deriving Hall space group symbols for 12003 CIFs using the 'cif_filter --estimate-spacegroup' command.	2003171.cif
125873	2014-10-25	cod/ (saulius@koala.ibt.lt) Adding DOIs to 1887 Acta Cryst. CIFs, their DOIs fetched using ACCE codes.	2003171.cif
125872	2014-10-25	cod/ (saulius@koala.ibt.lt) Adding issue number for 25 COD CIFs.	2003171.cif
26848	2011-09-28	cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree.	2003171.cif
17004	2011-03-31	cif/ Commiting CIFs, that were updated with the 'cif_fix_values' script, using options '--fix-misspelled replacement_values.lst', '--fix-temperature' and '--fix-enums' with built-in table of enum values. The following cmd was used: > (set -x; find ? -name \*.cif \| sort \| xargs -i sh -c 'if !( > cif_fix_values --fix-misspelled ~/../inputs/replacament_values.lst {} \| > cif_filter --add-cif-header {} \| > sponge {} ) 2>&1 \| grep NOTE; then svn revert {}; > fi' ) &	2003171.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.	2003171.cif
846	2009-11-14	cif/ Fixing _journal_volume values that had series letters prepended to them. Now the series letters are appended to the _journal_name_full, if needed, and the _journal_volume is purely numeric. To mimimise textual changes to CIFs this was done in several stages. First of all, a list of _journal_volume was compiled from the COD CIF collection: bash -xc 'find ? -name \*.cif \ \| xargs cif_values \ --file \ --tag _journal_volume' \ >& cod-journal-volumes-`-date`.log & giving us a cod-journal-volumes-2009.11.13.log file (committed for reference as well). Then a list of volume names with letters was extracted and most of them transformed automatically into a correct form: awk '$3~/^[A-Z][0-9]/' cod-journal-volumes-2009.11.13.log \ \| awk '{print $1}' \ \| xargs -n1 -iI \ bash -c 'echo === I ===;\ awk "/^#/,/^data_/{print}/^data_/{exit}" I > tmp-$$; \ cif_adjust_journal_name_volume I \ \| grep -E "_journal_name_full\|_journal_volume" >> tmp-$$; \ awk "/^data_/,/\$eof/" I \ \| grep -vE "^(data_\|_journal_name_full\|_journal_volume)" >> tmp-$$;\ mv -v tmp-$$ I' Note that this procedure assumes that all tags are at the beginning of the line, each value follows its tag on the same line, and there is only one tag per line. This procedure is not suitable for general CIFs, but fortunately, only very few CIFs in COD do not conform these rules. After the automatic conversion, a syntax check was run: svn st ? \ \| awk '{print $NF}' \ \| xargs -n1 -iI sh -c 'echo -n I"\r"; vcif -l 2048 I \|\| echo "!!! I !!!\n"' Entries that were found to have errors (very few, less than 10) were reverted and fixed manually. The entries that had letters embedded into them were grepped separately: awk '$3~/[A-Z][0-9]/' cod-journal-volumes-2009.11.13.log \ \| awk '$3~/^[^A-Z]/' and fixed manually. After all fixes, the previous 'vcif' test was rerun, yielding no syntax errors, and in addition a 'cif_filter' roundtrip test was run: svn st ? \ \| awk '{print $NF}' \ \| xargs -n1 -iI \ bash -c ' \ echo -en I "\r"; \ diff \ <(cif_filter I >& /dev/null) \ <(cif_filter I \| cif_filter >& /dev/null) \ \|\| echo "!!! I !!!\n"' This last test discovered one misspelled '_journal_yrae' tag in the 2/2003193.cif entry that was fixed by hand.	2003171.cif
318	2008-03-29	11 CIFs from Acta Cryst with double bibliography checked at journal and spurious data removed Added missing data and coeditor codes	2003171.cif
20	2008-01-26	Removing white space at the end of all lines from all COD CIF files: in the cod/cif/ directory: ff \*.cif \| xargs perl -i -pe 's/\s+\n$/\n/'	2003171.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/'	2003171.cif
14	2008-01-14	Appending a header with SVN keywords, COD URL and copying policy to all COD CIF files.	2003171.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.	2003171.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)	2003171.cif