3-Ethyl-2,2,4-trimethylpentane

NAME 3-Ethyl-2, 3, 4-trimethylpentane STRUCTURAL FORMULA 2H5 CH,CH C CHCH, 3 i i CH3CH3CH3... 

Ethyl acetate (EtOAc), Optima Grade, Fisher No. El 96 2,2,4-Trimethylpentane (isooctane). Optima Grade, Fisher No. 0301 Methanol (MeOH), Optima Grade, Fisher No. A454 Water, Optima Grade, Fisher No. W7-4... 

TRIMETHYLPENTANE 2,2,3,3-TETRAMETHYLBUTANE DI-n-BUTYL ETHER DI-sec-BUTYL ETHER DI-tert-BUTYL ETHER 2-ETHYL-1-HEXANOL... 

The solvents 1, ethyl acetate-2-propanol-water (126 70 35) 2, 2-propanol-water (90 10) 3, benzene-methanol (10 3) 4, chloroform-acetone (1 7) 5, 1-butanol-acetic acid-ether-water (0 6 3 1) 6, chloroform-2,2,4-trimethylpentane-methanol (50 15 5) 7, chloroform-methanol (10 2). 

The first synthesis of multiarm star polyisobutylene (PIB), with DPn(arm)=116 and the average number of arms=56, was described by Marsalko et al. [6]. The procedure started with the living polymerization of IB by the 2-chloro-2,4,4-trimethylpentane (TMPCl)/TiCl4 initiating system in CH2Cl2/hexane (50/50 v/v) at -40 °C in the presence of triethylamine. At 95% IB conversion, divinylben-zene (DVB, 6, containing 20% ethyl vinylbenzene) was added to effect linking at r=[DVB]/[TMPCl] = 10. 

Organothiophosphates recovered from 0.5g alumina or 0.5g FlorisilR when eluted with 4 ml 20% ethyl acetate in 2,2,4-trimethylpentane. ... 

A low yield of octanes was formed when ethylene was heated with 2,2-dimethylbutane (i.e., neohexane) in the presence of di-t-butyl peroxide and 20% hydrochloric acid (Expt. 12). The low conversion was probably due to the difficulty in abstracting a hydrogen atom attached to a neopentyl carbon atom (i.e., a secondary carbon atom attached to the tertiary carbon atom of a t-butyl group). The principal octane (about 75% of the octane product) was 2,2,3-trimethylpentane formed by ethylation at the secondary carbon atcxn 2,2-dimethylhexane formed by condensation at a primary carbon atom (the neohexyl carbon atom) was obtained in... 

Trimethylpentane was produced by ethylation at a tertiary carbon atom and more highly end-chain ethylated compounds (up to 2,3,3-trimethylpentadecane) were formed by telomeriration as were chloroalkane byproducts. ... 

Rather low yields of ethylation products were obtained by reaction of 2,2,4-trimethylpentane with ethylene. It seems probable that the abstraction of hydrogen even from the tertiary carbon atom was difficult because it was a neohexyl carbon atom. It was suggested by gc and ms analysis that the major reaction did occur at the tertiary carbon atom, yielding... 

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