Detail of "79-97-0"

Reference

Effect of the chemical structure of bisphenols on the kinetics of high-temperature polycondensation

Effect of the chemical structure of bisphenols on the kinetics of high-temperature polycondensation. Turska, Eligia; Jantas, Roman; Pietrzak, Lidia (Inst. Chem. Fiz. Technol. Polim., Politech. Slaska, Gliwice, Pol.). Polimery (Warsaw), 22(6), 193-5 (Polish) 1977. CODEN: POLIA4. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) At 180° the rate consts. of polymn. of terephthaloyl chloride (I) [100-20-9] with substituted 2,2-bis(4-hydroxyphenyl)propanes ranged from 0.49 for 2,2-bis(4-hydroxy-3-methylphenyl)propane (II) [79-97-0] to 0.08 for 2,2-bis(4-hydroxy-3-nitrophenyl)propane (III) [5329-21-5], as compared to 1.19 for 2,2-bis(4-hydroxyphenyl)propane (IV) [80-05-7]. At 220° the rate const. of polymn. of I with IV was 4.40; the rate consts. of I with II and III were 4.10 and 0.68, resp. The rate consts. of polymn. of I with 3,3',5,5'-tetramethyl-, 3,3'-dichloro-, and 3,3',5,5'-tetrachloro-substituted derivs. had intermediate values. The corresponding activation energies were calcd. The reactions were conducted in a-chloronaphthalene in N, and their rates were detd. by measuring the evolved HCl.

Role of hydrogen bonding in the mechanism of hydrogen atom abstraction from alkyl-substituted phenols by polyvinyl acetate radicals

Role of hydrogen bonding in the mechanism of hydrogen atom abstraction from alkyl-substituted phenols by polyvinyl acetate radicals. Simonyi, Miklos; Kardos, Julianna; Fitos, Ilona; Kovacs, Ilona; Pospisil, Jan (Cent. Res. Inst. Chem., Budapest, Hung.). J. Chem. Soc.Several reagents with their cas registry numbers 79-97-0 and 80-05-7 are used here., Perkin Trans. 2, (15), 1913-17 (English) 1976. CODEN: JCPKBH. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Section cross-reference(s): 35 The title reaction was studied by application of a novel diln. technique to the kinetic study of the inhibitied radical polymn. of CH2:CHOAc (I). The reaction occurred by simultaneous paths due to H bonding between I and the phenols. The influence of the H bonding on the reactivity at 50.degree. depended on the substitution; the free phenol is more reactive than the bonded form if at least 1 of the ortho positions is unsubstituted whereas the H bonded form is more reactive than the free form for 2,6-dialkylphenols. The individual reaction paths are assocd. with differing Arrhenius parameters. .