ChemInform Abstract: CHLORINE‐35 NQR SPECTRA OF ALKYL P‐CHLOROPHENYL SULFIDES AND P‐CHLOROPHENYL THIOL CARBOXYLATES

79,81Br NQR Spectra of Alkyl(4-Bromophenyl)Sulphides

“…The dependence of the 35C1 NQR frequencies of the compounds 4-ClC6H 4SR on the induction constants of the substituents R = CH m(C H 3)3_m is similar [3] to that for com pounds of the series RCOC1 and 4-RC6H 4C H 2Cl [2,3,6]: on going from m = 0 to m = 2 the N QR frequency correlates with the induc tivity of the substituents R (it increases with it). The N Q R frequencies of these compounds with m = 3 de viate from this correlation towards lower frequencies.…”

“…The 79,81Br N Q R frequencies of the com pounds 4-BrC6H 4S(C H 2)"H increase practically linearly when n increases from n = 4 to n = 7, and on further increase of n they oscillate ( Table 1, Fig. 1) just as that for the chloro-containing analogs [3] (Fig ure 1). Analogously to the latter compounds, the N Q R frequencies for com pounds of the series 4-BrC6H 4S(C H 2)"H are higher at odd n values than those at even ones.…”

“…The am plitude of oscillation of the 79,81Br N Q R frequencies for 4-BrC6H 4S(C H 2)"H is much higher than that of the 35C1 NQR frequencies for chloro-containing analogs. For the latters it is 0.5 M Hz [3] (Figure 1). Unfortunately, the experimental data for the com pounds 4-BrC6H 4S(CH 2)"H are insufficient.…”

“…N Q R spectra of the series 4-ClC6H 4S(C H 2)"H were studied in [3]. W hen n in creases from n = 1 to n = 6, the 35C1 N Q R frequency increases linearly, and on further increase of n the N Q R frequency oscillates near v77 35 M Hz (Figure 1).…”

“…The N Q R frequencies of halogen atom s in molecules of the series Y (CH 2)"X (where Y is a halo gen atom or a group containing it) usually oscillate when the n increases successively (see, e.g., [1][2][3][4][5]). The most convincing explanation of this oscillation is the polarization of a chemical bond by the charge of a geminal atom and the transmission of this effect along a chain of atoms [2].…”