Hot Atom Chemistry of <sup>18</sup>F in Liquid Fluorobenzenes, Part II

Bakker, C. N. M.; Briνkman, G. A.; Kaspersen, Frans M.

doi:10.1524/ract.1979.26.34.163

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The activity of the individual Compounds eluting from the GLC was determined by trapping them in toluene cooled with dry ice and counting them in a Nal well-type crystal. The Separation of the polymers was carried out by gelfiltration with CHCI3 on columns of Sephadex LH20 (0.75 m, 0 = 2.5 cm and 4.2 ml CHCI3 / min) [15,16]. Only the organic phase was brought on top of the column .…”

Section: Methodsmentioning

confidence: 99%

Reaction of Recoil ³⁸Cl Atoms with Liquid Chlorobenzenes

Briνkman¹,

Kaspersen²,

Veenboer³

1981

Radiochimica Acta

View full text Add to dashboard Cite

The reactions of recoil " C1 atoms (produced in a high flux nuclear reactor) with liquid chlorobenzenes were investigated. The yields of " CI-for-H and Q-replacement reactions, of inorganic Compounds and of polymers were measured in the presence of scavengers, by GLCtechniques and by gelfiltration over Sephadex. In unscavenged chlorobenzene, C^ Hj" C1 (52%) is formed via a direct hot replacement reaction (5%), via a thermal exchange reaction (28%) and via a radiation induced exchange reaction (19%). It is believed that hot H-abstraction leads to the inorganic yield, because this yield is not influenced by the addition of organic unsaturated Compounds. The total organic yield is not in-fluenced by the addition of organic scavengers, but the natura of the products depends considerably on the kind of scavenger used.Ophthalmie Research Institute (lOI)

show abstract

Section: Methodsmentioning

confidence: 99%

Reaction of Recoil ³⁸Cl Atoms with Liquid Chlorobenzenes

Briνkman¹,

Kaspersen²,

Veenboer³

1981

Radiochimica Acta

View full text Add to dashboard Cite

show abstract

“…In order to explain these findings, several reaction pathways were discussed,45,48 but the most likely explanation is the formation of a long-lived 18F-containing a complex, for which rearomatization two alternatives were proposed: (1) hydrogen abstraction by Br2 (I^45 or (2) the formation of [18F]fluorobromo(iodo)cyclohexadiene that subsequently eliminates HBr (HI), either almost directly or later during GLC analysis. 48 The increase found in the thermal 18F-for-H substitution yield on the addition of oxygen to gaseous systems could only be explained by some reaction of oxygen with a long-lived 18F-containing cyclohexadienyl radical.16…”

Section: Reactions Of Recoil Atomsmentioning

confidence: 99%

“…(3)p-C6H4FCF3 + 18F, (4) p-CgF4HCH3 + 18F, (5) m-C^CF,)* + 18F, (6) CeF6CH3 + 18F (T), (7) CeF5CF3 + 18F (T). 48 Yields of T are indicated by numbers in squares.…”

Section: Reactions Of Recoil Atomsmentioning

confidence: 99%