Detail of "6415-12-9"

Reference

2-Tetrazine/chloranil complex as inhibitor for the radical polymerization

2-Tetrazine/chloranil complex as inhibitor for the radical polymerization. Sugiyama, Kazuo; Tanaka, Mitsuhito; Kuwabara, Motoharu (Coll. Eng., Kinki Univ., Kure, Japan). Kinki Daigaku Kogakubu Kenkyu Hokoku, 17, 27-36 (Japanese) 1983. CODEN: KDKHD3. ISSN: 0386-491X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) The mechanism of inhibition of the bulk and soln. polymn. of styrene [100-42-5] and Me methacrylate [80-62-6] was studied in the presence of the change-transfer complex of 1,1,4,4-tetramethyl-2-tetrazine (I) with chloranil (II). Solvent effect on the polymn. inhibition by the complex was also studied. The polymn. inhibition by the complex was complete for both monomers. I and II reacted to form Me2NH [124-40-3], MeNH2 [74-89-5], Me2NNMe2 [6415-12-9], and 2-(dimethylamino)-3,5,6-trichloro-p-benzoquinone [22895-01-8]. A mechanism was proposed for the polymn. inhibition by the complex.

Estimation of Electronic Coupling for Intermolecular Electron Transfer from Cross-Reaction Data

All Rights Reserved. Some chemicals with cas registry numbers like 6415-12-9 and 178876-65-8 are also used. Estimation of Electronic Coupling for Intermolecular Electron Transfer from Cross-Reaction Data. Nelsen, Stephen F.; Weaver, Michael N.; Pladziewicz, Jack R.; Ausman, Logan K.; Jentzsch, Teresa L.; O'Konek, Jessica J. ( Department of Chemistry, University of Wisconsin, Madison, WI 53706-1396, USA). Journal of Physical Chemistry A, 110(41), 11665-11676 (English) 2006 American Chemical Society. CODEN: JPCAFH. ISSN: 1089-5639. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) Section cross-reference(s): 65 Sixty five electron-transfer reactions including 27 new 0, +1 couples have been added to our data set of cross-reactions between 0 and +1 couples, bringing it to 206 reactions involving 72 couples that have been studied by stopped-flow kinetics in acetonitrile contg. supporting electrolyte at 25 °C, formal potentials detd. by cyclic voltammetry, and analyzed using Marcus cross-rate theory. Perhaps surprisingly, a least-squares anal. demonstrates that intrinsic rate consts. exist that predict the cross-rate consts. to within a factor of 2 of the obsd. ones for 93% of the reactions studied, and only three of the reactions have a cross-rate const. that lies outside of the factor of 3, that corresponds to a factor of 10 uncertainty in the rate const. for an unknown couple. Many triarylamines, which have very high intrinsic reactivity, are included among the newly studied couples. The enthalpy contribution to the Marcus reorganization energy, l'v, has been calcd. for 46 of the couples studied, at the (U)B3LYP/6-31+G* (or for the larger and lower barrier compds., at the less time-consuming (U)B3LYP/6-31G*) level. In combination with a modified Levich and Dogonadze treatment that assumes that the rate const. is proportional to (KeHab2/l1/2) exp[-DG*/RT], this allows estn. of the electronic coupling (Hab) at the transition state for intermol. electron transfer, (more properly H'ab, the product of the square root of the encounter complex formation const. times Hab) for these couples. Although the principal factor affecting intermol. electron-transfer rate consts. is clearly l, H'ab effects are easily detectable, and the dynamic range in our ests. of them is over a factor of 600. .