Engineer It to Sell

Frey, Donald N.

doi:10.4271/640065

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“…Since the addition of methyle ne to e thyle ne to form cyclopropane : (19) is a well-known reaction [21] , the presence of thi s product suggests that methyle ne is form ed in the solid phase photolysis and radiolysis of ethylene. Indeed, the isotopic composition of the cyclopropane produced in the photolysis and radiolysis of a C2H4 : C2D4 (1 : 1) mixture (see Results) indicates that more than 80 percent of the cyclopropane consists of c-C 3H 6 , c-ClH4D2, c·C 3D4H 2 , and c-C 3 D6• This distribution is consistent with the formation of cyclopropane through addition of CH2(CD2) to C2H4(C 2 D4).…”

Section: _3 the Formation Of Cyclopropanementioning

confidence: 99%

The solid phase photolysis and radiolysis of ethylene at 20 to 77 K

Gorden¹,

Ausloos²

1971

J. RES. NATL. BUR. STAN. SECT. A.

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Fi lms of e th y le n e co nd e nse d o nt o a co ld fin ge r ma int a ine d a t 20 K we re ir radi a ted with ph ot o ns wh ose e ne rgy ra nged fro m 8.4 to 21.2 e V. At th e h ig he r ph oto n e ne rgies th e re la tiv e yie ld s of produ c ts co mp a re we ll with th ose see n in th e radi o lys is o f so lid e th y le ne. Expe rime nt s o n C H2C D2 d e m o ns tra te th a t in th e p hoto lys is h ydrogen is ma inl y fo rm ed b y th e e limin a ti o n processes C H 2C D~ ---> H AD 2)The re la tiv e proba biliti es o f th ese three pro-cesses a re ind e pe nd e nt o f th e e n e rgy o f th e in c id e nt p hoto ns fr o m 8.4 to 11. 6 e V a nd a re within expe rim e nt a l e rror id e ntic a l to th ose o bse rved in ea rl ie r g as p hase photolys is expe rim e nts . Re la t ive to ace tyle ne, cyc lo but a ne is a mi no r pro du c t a t 8.4 eV but in c reases b y a n o rd e r o f magn it ud e a t hi ghe r e ne rg ies wh e re ion s pla y a role. C yc lo buta n e , I · bute ne a nd me th ylcyclopro pa n e fo rm ed up on irradia tio n of froze n C 2H, -C 2D, mixtures cons isted ma inl y of C,DB, C.,D,H" a nd C.,H 8. Pl a us ib le m ec ha ni sm s wh ic h m ay acco u nt fo r th e fo r ma tio n of the la tt e r p rodu c ts a re exa min e d. In t he so lid p hase as in th e gas ph ase th e re la ti ve impo rta nce of H·a to m produ c t io n is see n to in c rease with in c reas in g ph oto n e ne rgy. Cyc lo propa ne, a ppa re ntl y form ed b y in se rtion of C H, int o C, H." is o bse r ved as a p rodu c t a t a ll wave · le n gth s in th e ph oto lys is, a nd in t he ra d io lys is. Key wo rd s: Et hy le ne; free rad ica l reac t ions; io n-m o lec u le reac ti o ns; ph oto lys is: po lyme ri zati o n ; ra d io lys is .

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Section: _3 the Formation Of Cyclopropanementioning

confidence: 99%