COLLECTED BY
Organization:
Internet Archive
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At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the
Wayback Machine.
The seed for Wide00014 was:
- Slash pages from every domain on the web:
-- a list of domains using Survey crawl seeds
-- a list of domains using Wide00012 web graph
-- a list of domains using Wide00013 web graph
- Top ranked pages (up to a max of 100) from every linked-to domain using the Wide00012 inter-domain navigational link graph
-- a ranking of all URLs that have more than one incoming inter-domain link (rank was determined by number of incoming links using Wide00012 inter domain links)
-- up to a maximum of 100 most highly ranked URLs per domain
The seed list contains a total of 431,055,452 URLsThe seed list was further filtered to exclude known porn, and link farm, domainsThe modified seed list contains a total of 428M URLs
The Wayback Machine - https://web.archive.org/web/20160912012059/http://www.cambridgesoft.com/services/documentation/sdk/chemdraw/cdx/properties/Bond_CIPStereochemistry.htm
Bond_CIPStereochemistry Property
| CDXML Name: | BS |
| CDX Constant Name: | kCDXProp_Bond_CIPStereochemistry |
| CDX Constant Value: | 0x060A |
| Data Size: | INT8 |
| Property of objects: | kCDXObj_Bond |
| |
| First written/read in: | ChemDraw 6.0 |
| Required? | No |
Description:
The bond's absolute stereochemistry according to the Cahn-Ingold-Prelog system.
ChemDraw will preserve any value present in a file without confirming its accuracy -- as long as the structure is not edited in ChemDraw. Any change to a structure has the potential of changing its stereochemical descriptors, and so ChemDraw will recalculate the structure's chemistry after any change. As a practical matter, we are very confident about the accuracy of ChemDraw's calculation of stereochemical descriptors, so this behavior should rarely cause problems.
The Cahn-Ingold-Prelog system for describing absolute stereochemistry is defined in the following references:
- R.S. Cahn, C.K. Ingold, and V. Prelog, Specification of Molecular Chirality, Angew. Chem., Int. Ed. Engl. 1966, 5, 385-414 (errata: 1966, 5, 511); Angew. Chem. 1966, 78, 413-447.
- V. Prelog and G. Helmchen, Basic principals of the CIP-System and Proposals for a Revision, Angew Chem. 1982, 94, 614-631; Angew.
Chem., Int. Ed. Engl. 1982, 21, 567-583.
- P. Mata and A.M. Lobo, The CIP Sequence Rules: Analysis and Proposal for a Revision, Tetrahedron: Asymmetry.1993, 4,
657-668.
This is an enumerated property. Acceptible values are shown in the following list:
| Value |
CDXML Name |
Description |
| 0 |
U |
Undetermined |
| 1 |
N |
Determined to be symmetric |
| 2 |
E |
Asymmetric: (E) |
| 3 |
Z |
Asymmetric: (Z) |
If this property is absent:
The bond is treated as having Undetermined stereochemistry.
CDX Documentation index
