Crystallography Open Database

Information card for entry 2004998

2004997 << 2004998 >> 2004999

Preview

Coordinates	2004998.cif
Structure factors	2004998.hkl
Original IUCr paper	HTML

Structure parameters

Chemical name	L-isoleucine
Formula	C6 H13 N O2
Calculated formula	C6 H13 N O2
Title of publication	L-Isoleucine, Redetermination at 120 K
Authors of publication	Görbitz, Carl Henrik; Dalhus, Bjørn
Journal of publication	Acta Crystallographica Section C
Year of publication	1996
Journal volume	52
Journal issue	6
Pages of publication	1464 - 1466
a	9.681 ± 0.005 Å
b	5.301 ± 0.003 Å
c	13.956 ± 0.006 Å
α	90°
β	96.16 ± 0.04°
γ	90°
Cell volume	712.1 ± 0.6 Å³
Cell temperature	153 ± 2 K
Ambient diffraction temperature	120 ± 2 K
Number of distinct elements	4
Space group number	4
Hermann-Mauguin space group symbol	P 1 21 1
Hall space group symbol	P 2yb
Residual factor for all reflections	0.0717
Residual factor for significantly intense reflections	0.0524
Weighted residual factors for all reflections	0.1316
Weighted residual factors for significantly intense reflections	0.1223
Goodness-of-fit parameter for all reflections	1.009
Goodness-of-fit parameter for significantly intense reflections	1.065
Diffraction radiation wavelength	0.71069 Å
Diffraction radiation type	MoKα
Has coordinates	Yes
Has disorder	No
Has F_obs	Yes

Version history

Revision	Date	Message	Files
176428 (current)	2016-02-13	Replaced deprecated COD CIF data names with their more modern alternatives. The _cod_cif_authors_sg_Hall and _cod_cif_authors_sg_H-M data items were renamed to _cod_original_sg_symbol_Hall and _cod_cif_authors_sg_H-M respectively.	2004998.cif 2004998.hkl
175227	2016-01-28	hkl/2/00/49/ (antanas@echidna.ibt.lt) Adding svn:keywords property for the hkl of 2004998.	2004998.cif 2004998.hkl
175226	2016-01-28	cif/ hkl/ Adding hkl file for entry 2004998.	2004998.cif 2004998.hkl
175224	2016-01-28	cif/2/00/ (antanas@echidna.ibt.lt) Adding additional information from the original publication for entry 2004998.	2004998.cif
26848	2011-09-28	cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree.	2004998.cif
5310	2011-01-02	cif/ Running cif_fix_enum with the core CIF dictionary on COD ranges 2, 8 and 9. Range 9 remained unchanged, and in ranges 2 and 8 there were 17309 modified files, most changes were fixes enumerator case.	2004998.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.	2004998.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.	2004998.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.	2004998.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/'	2004998.cif
14	2008-01-14	Appending a header with SVN keywords, COD URL and copying policy to all COD CIF files.	2004998.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.	2004998.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)	2004998.cif