Detail of "3404-63-5"

CAS Number:
3404-63-5
Name:
1-Pentene, 3-methylene-
Molecular Structure:
Formula:
C6H10
Molecular Weight:
82.16
Synonyms:
1,3-Butadiene,2-ethyl- (6CI,7CI,8CI); 2-Ethyl-1,3-butadiene; 2-Ethylbutadiene
Density:
0.698g/cm³
Boiling Point:
75°Cat760mmHg
Flash Point:
°C
Hazard Symbols:
A poison.
Safety:
A poison by intravenous route. When heated to decomposition it emits acrid smoke and irritating vapors. Details

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Structure of active polymerization centers of 1,3-dienes in systems with lithium counterion: Structure of active polymerization centers of 1,3-dienes in systems with lithium counterion. Erusalimskii, G. B.; Kormer, V. A. (Vses. Nauchno-Issled. Inst. Sint. Kauch. im. Lebedeva, Leningrad, USSR). Vysokomol. Soedin., Ser. B, 19(3), 169-72 (Russian) 1977. CODEN: VYSBAI. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) Section cross-reference(s): 22 The most stable structures of compds. modeling active centers in polymn. of 1,3-dienes in the presence of Li catalysts were in qual. agreement with the microstructure of the corresponding polymers reported in the literature. Crotyllithium [16327-44-9], 2,3-dimethylallyllithium [62883-81-2], and 2-ethyl-3-methylallyllithium [62883-82-3] were selected as models of active centers in the polymn. of butadiene [106-99-0], isoprene [78-79-5], and 2-ethylbutadiene [3404-63-5], resp. Calcn. of the total energy of each of the 4 limiting structures (.sigma., .pi.;cis, trans) of each model compd. by the CNDO/2 method indicated the highest stability for the nonplanar structure of the .pi.-type and of cis configuration.

Reactions of 1,3-dienes with sulfur dioxide: Reactions of 1,3-dienes with sulfur dioxide. Part II. Kinetics of the addition reaction. Isaacs, Neil S.; Laila, Abdulhameed A. R. (Dep. Chem. 3404-63-5 and 126-99-8 are cas registry numbers. These chemicals are also mentioned in this article., Univ. Reading, Reading, Engl.). J. Chem. Res., Part S (Synop.), (1), 10-11 (English) 1977. CODEN: JRPSDC. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The kinetics of addn. of SO2 to 15 substituted butadienes to give sulfolenes were detd. at 25-40.degree. in benzene. The reactions are probably controlled by a conformational preequil. in which the diene adopts a cis-copolanar conformation. Apart from conformational factors, the reactions were mildly accelerated by electron-donating groups and decelerated by 1- more than 2-substituents, particularly when cis. .