Crystallography Open Database

Information card for entry 2103726

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Coordinates	2103726.cif
Structure factors	2103726.hkl
Original IUCr paper	HTML
External links	ChemSpider

Structure parameters

Common name	maleic hydrazide
Chemical name	1,2-dihydropyridazine-3,6-dione; 6-hydroxy-3-pyridazinone
Formula	C4 H4 N2 O2
Calculated formula	C4 H4 N2 O2
SMILES	n1[nH]c(=O)ccc1O
Title of publication	Polymorphism of maleic hydrazide. I
Authors of publication	Katrusiak, Andrzej
Journal of publication	Acta Crystallographica Section B
Year of publication	2001
Journal volume	57
Journal issue	5
Pages of publication	697 - 704
a	5.8181 ± 0.001 Å
b	5.8 ± 0.001 Å
c	7.309 ± 0.001 Å
α	78.8 ± 0.03°
β	99.36 ± 0.03°
γ	107.13 ± 0.03°
Cell volume	229.75 ± 0.08 Å³
Cell temperature	300 ± 1 K
Ambient diffraction temperature	300 ± 1 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	0.0869
Residual factor for significantly intense reflections	0.0535
Weighted residual factors for all reflections included in the refinement	0.0882
Goodness-of-fit parameter for all reflections included in the refinement	1.01
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Has coordinates	Yes
Has disorder	No
Has F_obs	Yes

Version history

Revision	Date	Message	Files
201972 (current)	2017-10-13	cif/ Marking COD entries in range 2/10 that are known to be related to ChemSpider entries using the _cod_related_entry data loop.	2103726.cif 2103726.hkl
180897	2016-04-02	hkl/2/10/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/10/37.	2103726.cif 2103726.hkl
176768	2016-02-20	cif/2/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/10.	2103726.cif 2103726.hkl
91933	2013-12-28	cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs.	2103726.cif 2103726.hkl
88064	2013-08-29	Adding _cod_database_fobs_code data item to all COD CIFs that have Fobs deposited and did not have this data item yet.	2103726.cif 2103726.hkl
32112	2012-02-03	cif/: committing an update of 45+ thous files, with information appended from the originals.	2103726.cif 2103726.hkl
26848	2011-09-28	cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree.	2103726.cif 2103726.hkl
26029	2011-09-17	cif/2/ Reverting changes of revision 25271: ( cd cif/2/; svn merge -r25271:25270 . ) The problem was that the reprocessed files from IUCr, although were more complete, "resurrected" data errors that were corrected in the previous recisions. The additional data that have been extracted during the reprocessing will have to be merged without overwriting the existing values in COD files, except some explicit and controlled cases (such as publication titles and chemical names).	2103726.cif 2103726.hkl
25271	2011-09-10	cif/2/ Adding reporocessed IUCr CIFs for the years 1980-2010. The CIFs now contain more complete bibliography, substance names, correctly unfolded text fields (using the CIF line unfolding protocol), explicitely set cell angles, and _cod_data_source_block fields.	2103726.cif 2103726.hkl
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.	2103726.cif 2103726.hkl
697	2009-05-05	Adding 1667 more Fobs files, ones that have cell constans differenig not more than 0.1% from the cell constants in the coordinate file. The symmetry operators must also match in both files.	2103726.cif 2103726.hkl
397	2008-06-20	Adding new CIF files deposited from Acta-Cryst-B-2001-2003/.	2103726.cif