Crystallography Open Database

Information card for entry 2223216

Preview

Coordinates	2223216.cif
Structure factors	2223216.hkl
Original IUCr paper	HTML

Structure parameters

Chemical name	2,2,6,6-Tetrakis(biphenyl-2-yl)-4,4,8,8-tetramethylcyclotetrasiloxane
Formula	C52 H48 O4 Si4
Calculated formula	C52 H48 O4 Si4
SMILES	C[Si]1(C)O[Si](O[Si](C)(C)O[Si](O1)(c1ccccc1c1ccccc1)c1ccccc1c1ccccc1)(c1ccccc1c1ccccc1)c1ccccc1c1ccccc1
Title of publication	2,2,6,6-Tetrakis(biphenyl-2-yl)-4,4,8,8-tetramethylcyclotetrasiloxane
Authors of publication	Couzijn, Erik P. A.; Lutz, Martin; Spek, Anthony L.; Lammertsma, Koop
Journal of publication	Acta Crystallographica Section E
Year of publication	2009
Journal volume	65
Journal issue	9
Pages of publication	o2182 - o2183
a	17.3418 ± 0.0002 Å
b	14.6488 ± 0.0002 Å
c	17.9584 ± 0.0002 Å
α	90°
β	90°
γ	90°
Cell volume	4562.09 ± 0.1 Å³
Cell temperature	110 ± 2 K
Ambient diffraction temperature	110 ± 2 K
Number of distinct elements	4
Space group number	61
Hermann-Mauguin space group symbol	P b c a
Hall space group symbol	-P 2ac 2ab
Residual factor for all reflections	0.0579
Residual factor for significantly intense reflections	0.0356
Weighted residual factors for significantly intense reflections	0.0868
Weighted residual factors for all reflections included in the refinement	0.0966
Goodness-of-fit parameter for all reflections included in the refinement	1.067
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
181153 (current)	2016-04-03	hkl/2/22/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/22/32.	2223216.cif 2223216.hkl
176789	2016-02-20	cif/2/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/22.	2223216.cif 2223216.hkl
91933	2013-12-28	cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs.	2223216.cif 2223216.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.	2223216.cif 2223216.hkl
32112	2012-02-03	cif/: committing an update of 45+ thous files, with information appended from the originals.	2223216.cif 2223216.hkl
26848	2011-09-28	cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree.	2223216.cif 2223216.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).	2223216.cif 2223216.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.	2223216.cif 2223216.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.	2223216.cif 2223216.hkl
830	2009-10-12	hkl/ Adding Fobs data for the structures deposited from Acta-Cryst-C-2009_09/ and Acta-Cryst-E-2009_09/.	2223216.cif 2223216.hkl
828	2009-10-12	cod/cif/ Depositing structures from the Acta-Cryst-C-2009_09/, Acta-Cryst-E-2009_09/ and Chem-Comm-2009_01-38/ data.	2223216.cif