Cyclopentadiene 1,2,3,4,5-pentachloro

Ethylene carbonate, reaction with potassium thiocyanate, 42, 59 Ethylene sulfide, 42, S9 Ethyl formate, reaction with cyclo-hexylamine, 41, 14 Ethyl- -hexylamine, 43, 47 5-(2-Ethylhexyl)-l,2,3,4,5-pentachloro-cyclopentadiene, 43, 93 Ethylhydrazinium hydrogen oxalate,... 

Hexachlorocyclopentadiene, ethylation to l,2,3,4,5-pentachloro-5-ethyl-cyclopentadiene, 43, 90 Hexadecanedioic acid, 43, 39... 

Note Chlordane is a mixture of cis- and tra/rs-chlordane and other complex chlorinated hydrocarbons including heptachlor (<7%) and nonachlor. According to Brooks (1974), technical chlordane has the approximate composition fra/rs-chlordane (24%), four chlordene isomers (CioHeCls) (21.5%), cA-chlordane (19%), heptachlor (10%), nonachlor (7%), pentachloro-cyclopentadiene (2%), hexachlorocyclopentadiene (>1%), octachlorocyclopentene (1%), C10H7. sCle- (8.5%), and unidentified compounds (6%). 

Quistad, G.B. and Mulholland, K.M. Photodegradation of dienochlor [bis(pentachloro-2,4-cyclopentadien-l-yl)] by sunlight, J. 

Reduction of indolenines with sodium and ethanol gives indolines. The pentachloro-a-pyrrolenine (205) is in equilibrium with small but finite amounts of the isomeric (3-pyrrolenine form (3//-pyrrole 206), since it forms cycloadduct (207) with styrene (80JOC435). Pentachloropyrrole acts as a dienophile in its reaction with cyclopentadiene via its ene moiety (81JOC3036). 

As with the alkyl and aryl derivatives of the pyrrolenines and indolenines, a tautomeric equilibrium has also been noted between the pentachloro-2//- and -3H- pyrroles, such that when the 2//-pyrrole, produced by chlorination of 2,3,4,5-tetrachloropyrrole or of 3,4-dichloromaleimide, is allowed to react with dienophiles, the adducts are those formed by cycloaddition with the 3H-pyrrole tautomer (Scheme 84) (80JOC435, 80JA7862, 81JOC3036). Cycloaddition with cyclopentadiene occurs on the 2H-pyrrole, which behaves as the dienophile. 

At the same time, the product of structure 72 is actually formed when hexachlorocyclopentadiene (40) is subjected to reductive dechlorination, and the bis(pentachloro-2,4-cyclopentadiene-l-yl) (pentac, 73) formed again absorbs two chlorine atoms by chlorination under ultraviolet light. 

Section IV,A,2,a Pentachloro-2H-pyrrole (21) behaves as a diene via the rearranged 3f/-pyrrole form 133 in its reaction with trans-1,3-pentadiene, giving a product 132 having R = trans-l-propenyl. However, the mode of cycloaddition is reversed with cyclopentadiene, the 2i/-pyrrole (21) reacting directly as a dienophile at the 3-4 C=C bond. With 1,3-cyclohexadiene, both modes of cycloaddition occur simultaneously. Steric factors rather than relative HOMO and LUMO energies are thought to determine the reaction course.147... 

Bis(/ -methoxyphenyl)-l,l,l-trichloroethane, see Methoxychlor Bis(l-methylethyl)carbamothioic acid 5 -(2,3-dichloro-2-propenyl) ester, see Diallate TV,TV -Bis( l-methylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diamine, see Prometryn Bis(2-methylpropyl)carbamothioic acid 5 -ethyl ester, see Bntylate Bis(pentachlor-2,4-cyclopentadien-l-yl) see Dienochlor Bis(pentachloroclopentadienyl) see Dienochlor Bis(pentachloro-2,4-cyclopentadien-l-yl) see Dienochlor Bis(tris(P,P-dimethylphenethyl)tin)oxide, see Fenbntatin oxide... 

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