Reactions of ^34mCI Recoil Atoms with Liquid Mixtures of CCl₄ and C₆H₆

Reactions of Recoil Τ Atoms with Liquid Chloroethylenes

“…The differences in the yields of 1,1,2-CH 2 TCC1 3 from cis or trans 1,2-C 2 H 2 C1 2 are not understood.). These yields are not different as those measured from a similar reaction chain starting with recoil 34m Cl atoms, yielding chloroethanes containing two CI atoms more than the target chloroethylenes [14], 7. Other products C 2 HTC1 2 yields from C 2 HC1 3 (Table 5), but our results gave no convincing evidence for the preference of a specific site of addition.…”

“…From C 2 HC1 3 the 1,2-C 2 HTC1 2 isomers are formed in a trans/cis ratio of 1.36 ± 0.05. A similar ratio was found for the reactions of Τ atoms with 1,1-C 2 H 2 C1 2 : 1.51 +0.21 (total yield 1.1%) and also for 34m Cl atoms with 1,1,2-C 2 H 3 C1 3 : 1.56 ± 0.07 (yield 1.0%) and with 1,1,2,2-C 2 H 2 C1 4 : 1.34 ± 0.07 (yield 1.2%) [14].…”

Replacement Reactions of Recoil Halogens with Benzene Derivatives

“…The correct interpretation of experimental data obtained in aliphatic and aromatic hydrocarbons and their haloderivatives [7][8][9][10][11][12][13][14][15][16][17] requires one to differentiate between the products of radical reactions in the bulk, and primary and secondary geminate recombinations since any of these processes possibly overlap the results of hot reactions [18].…”

Reactions of Recoil Chlorine-38 in o-Dichlorobenzene Mixtures

“…The competitive reaction is thus RH + 38 C1 >-H 38 Cl + R whose rate constant in gas phase system is very high (2 χ 10 10 dm 3 mol" 1 s -1 for primary Η atoms) and is also expected to be a very efficient process in condensed phase [11], This competitive reaction reduces the 38 Clfor-H substitution products from o-DCB. The first step involves the formation of a 38 CI substrate complex (if a multistep mechanism is operative as in case of monosubstituted benzenes) followed by a reaction with another o-DCB molecule or in a competing process, it can abstract Η from the diluent.…”

“…Reactions of recoil chlorine in liquid organic media have been extensively studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and the work on arenes has recently been reviewed by BRINKMAN [17]. Considerable part of the organic yield in aromatic compounds arises from the thermal processes as can be seen from the work of BEREI andSTÖCKLIN [3], BRINKMAN etal.…”