Home
Resources
Publications
Free Radicals in Dicarboxylic Acids: An e.s.r. Study of Radical Conversions in Gamma-Irradiated Single Crystals of Glutaric Acid and glutaric-2,2,4,4-d4 Acid

Free Radicals in Dicarboxylic Acids: An e.s.r. Study of Radical Conversions in Gamma-Irradiated Single Crystals of Glutaric Acid and glutaric-2,2,4,4-d4 Acid

R Bergene, A Minegishi, P Riesz

Int J Radiat Biol Relat Stud Phys Chem Med. 1980 Oct;38(4):383-94.

PMID: 6254898

Abstract:

The gamma-radiation-induced free radicals in single crystals of glutaric acid and glutaric-2,2,4,4-d4 acid were studied in the temperature range 77-300 K by e.s.r. techniques. At 77 K the decarboxylation radical and the anion are stabilized. At higher temperatures the decarboxylation radical is found to be converted into a hydrogen abstraction radical with an activation energy of 6.3 +/- 0.5 kcal/mole for the non-deuterated crystal. This radical is stable at room temperature. The anion seems be be converted to an unidentified intermediate radical which in turn is converted to the gamma-acyl radical. An analysis of the g-value anisotropy and of the 13C hyperfine splitting variation for this radical in the deuterated crystal is consistent with the assigned radical structure. By heat treatment the alpha-acyl radical is converted to another form of the hydrogen abstraction radical with an activation energy of 9.6 +/- 0.6 kcal/mole in the deuterated crystal. U.V.-light (gamma = 254 nm) transforms one of the room temperature radicals into the other.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP1069132371	Glycodeoxycholic-2,2,4,4-d4 acid		1069132-37-1	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: