IUPAC > Gold Book > alphabetical index > A > attachment
icon

IndexesDownload


attachment

A transformation by which one molecular entity (the substrate ) is converted into another by the formation of one (and only one) two-centre bond between the substrate and another molecular entity and which involves no other changes in connectivity in the substrate. For example, the formation of an acyl cation by attachment of carbon monoxide to a carbenium ion (R+):
A00512-1
The product of an attachment may also be the adduct of the two reactants, but not all adducts can be represented as the products of an attachment. (For example, the Diels–Alder cycloaddition:
A00512-2
results in an adduct of buta-1,3-diene and ethene, but the reaction cannot be described as an attachment since bonds are formed between more than two centres.)
Source:
PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1086
InChI=1/C6H10/c1-2-4-6-5-3-1/h1-2H,3-6H2
HGCIXCUEYOPUTN-UHFFFAOYAQ
InChI=1/C4H6/c1-3-4-2/h3-4H,1-2H2
KAKZBPTYRLMSJV-UHFFFAOYAZ
InChI=1/C2H4/c1-2/h1-2H2
VGGSQFUCUMXWEO-UHFFFAOYAE
Interactive Link Maps
First LevelSecond LevelThird Level
GraphGraphGraph
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.A00512.
Original PDF version: http://www.iupac.org/goldbook/A00512.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
Current PDF version | Version for print | History of this term
picture