Crystallography Open Database

Information card for entry 7101881

Preview

Coordinates	7101881.cif
Original paper (by DOI)	HTML

Structure parameters

Chemical name	4,4-Dimethyl-(1 RS, 7 SR)-2,6-Dioxa-3,3,5,5-tetrakis (trimethylsilyl)-3,4,5-trisila-cis-bicyclo[5.3.1]undecane
Formula	C20 H52 O2 Si7
Calculated formula	C20 H52 O2 Si7
Title of publication	Twisted oxygen-containing oligosilanes‒unprecedented examples of sigma-n mixed conjugated systems.
Authors of publication	Krempner, Clemens; Ludwig, Ralf; Flemming, Anke; Miethchen, Ralf; Köckerling, Martin
Journal of publication	Chemical communications (Cambridge, England)
Year of publication	2007
Journal issue	18
Pages of publication	1810 - 1812
a	11.0842 ± 0.0009 Å
b	30.12 ± 0.003 Å
c	10.5929 ± 0.0009 Å
α	90°
β	107.816 ± 0.003°
γ	90°
Cell volume	3366.9 ± 0.5 Å³
Cell temperature	243 ± 2 K
Ambient diffraction temperature	243 ± 2 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	0.0815
Residual factor for significantly intense reflections	0.0574
Weighted residual factors for significantly intense reflections	0.1432
Weighted residual factors for all reflections included in the refinement	0.1557
Goodness-of-fit parameter for all reflections included in the refinement	1.041
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Has coordinates	Yes
Has disorder	Yes
Has F_obs	No

Version history

Revision	Date	Message	Files
180120 (current)	2016-03-26	cif/7/10/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 7/10/18.	7101881.cif
106525	2014-03-15	cif/ (saulius@koala.ibt.lt) Adding DOIs to those Chem. Comm. structure descriptions that did not have it before and that could be matched unambiguously. Unambiguously means: a) journal name is "like 'Chem%Com%'" in SQl parlour b) first author's last name is the same in COD and in PubMed b) publication year and first page are the same in COD and in PubMed database. The commands to change these files where: awk '{print $1, $2}' outputs/join-dois.tab \ \| xargs -i sh -c ' CODID=$(echo {} \| awk "{print \$1}"); DOI=$(echo {} \| awk "{print \$2}"); CODFILE=$(echo $CODID \| codid2file); if ! grep -q _journal_paper_doi $CODFILE; then ( set -x; echo _journal_paper_doi $DOI >> $CODFILE ); else echo $CODID already has DOI; fi' Some files that did not had new-line at the end had to be fixed afterwards (in the ~/struct/cod/cif/7 directory, a COD working copy): svn st \ \| awk '{print $2}' \ \| xargs cifparse -q 2> /dev/null \ \| awk -F"'" '{print $2}' \ \| xargs perl -i -pe 's/_journal_paper_doi/\n_journal_paper_doi/' The working copy containing 'outputs/join-dois.tab' was: Path: /home/saulius/struct/xyz-extraction/dois/chem-comm-refetched-from-pubmed URL: svn+ssh://pitonas.ibt.lt/home/xray/svn-repositories/xyz-extraction/dois/chem-comm-refetched-from-pubmed Repository Root: svn+ssh://pitonas.ibt.lt/home/xray/svn-repositories/xyz-extraction Repository UUID: 9acf3947-1f02-0410-ae2a-984b57ad209b Revision: 2871 Node Kind: directory Schedule: normal Last Changed Author: saulius Last Changed Rev: 2871 Last Changed Date: 2014-03-15 11:18:46 +0200 (Sat, 15 Mar 2014) Three conflicts in files 10/81/7108128.cif, 10/81/7108130.cif and 10/99/7109903.cif were resolved manually.	7101881.cif
35909	2012-02-26	cif/7/: reorganising range 7 into a prefix-directory tree.	7101881.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.	7101881.cif
403	2008-06-25	Comitting the Chem-Comm-2007/ CIF files with extracted structural data.	7101881.cif