Szilard-Chalmers reactions in bridged ferrocene derivatives

54Fe(ϒ,2n)52Fe Induced Szilard-Chalmers Effect in Ferrocene and Ferricinium Picrate

“…In the case of irradiated solutions of ferrocene lowest ^'Fe-susceptible to fast exchange -of trace amounts of Fe^^ retentions observed are in the order of 1 % er less, due to carrier added prior to the extraction with DIPE, as was interference of solvent or solutes with the recombination observed in a number of separate experiments (Table 1, of fragments [3,4,5,6]. HiLLMAN et al [3] have observed note b) point out this possibility.…”

“…In the case of irradiated solutions of ferrocene lowest ^'Fe-susceptible to fast exchange -of trace amounts of Fe^^ retentions observed are in the order of 1 % er less, due to carrier added prior to the extraction with DIPE, as was interference of solvent or solutes with the recombination observed in a number of separate experiments (Table 1, of fragments [3,4,5,6]. HiLLMAN et al [3] have observed note b) point out this possibility. in the case of irradiated solutions, a notable influence of the Here, one should also bear in mind that notwithstanding polarity of the solvent and they explain the lower retensolid ferrocene is rather stable with regard to radiation tions observed for more polar solvents to a reduced probdecomposition some inorganic iron is formed: a G-value ability for recombination of the recoiling iron with the of about 0.03 has been reported, however without assignoriginal organic moiety.…”

“…For comparison and in view of the surveying nature of this investigation, we have adhered to the type of chemical procedure previously used by others for "Fe [2][3][4][5]9]. These methods concern primarily solvent extraction techniques which render a simple way to determine the separable inorganic yield of "Fe.…”

“…Related studies deal with bridged ferrocenes as solids and in Solution [3], with solid [CpFe(C0)2 J^ [7], with Fe(CO)s /cyclopentadiene solutions [8] and with solid ferricinium picrate [9]. Invariably these studies were carried out by looking at the chemical fate of ^'Fe = 45 d) produced in nuclear reactors by the process "Fe(n, 7)''Fe, with a maximum recoil energy of 394 eV for the groundstate transition [5].…”

“…Of those TT-bonded ferrocene (bis cyclopentadienyl iron (II), FeCpa) has been investigated in the solid State [2, 3,4, 5] and in Solution [3,4,5,6]. Ferrocene is a stable crystalline aromatic sandwich Compound, easy to sublime.…”