Reference

Primary products in the reactions of oxygen atoms with simple and substituted hydrocarbons

Primary products in the reactions of oxygen atoms with simple and substituted hydrocarbons. Blumenberg, B.; Hoyermann, K.; Sievert, R. (Inst. Phys. Chem., Univ. Goettingen, Goettingen, Ger.). Symp. (Int.) Combust., [Proc.], Volume Date 1976, 16, 841-52 (English) 1977. CODEN: SYMCAQ. DOCUMENT TYPE: Journal CA Section: 51 (Fossil Fuels, Derivatives, and Related Products) Section cross-reference(s): 22 The reaction of at. O with alkenes (C2H4 [74-85-1], propylene [115-07-1], 1-butene [106-98-9], cis- [590-18-1] and trans-2-butene [624-64-6]) was shown by mol. beam sampling and mass spectrometry to proceed primarily by formation of acyl and alkyl radicals. Formation of aldehydes and carbenes is a minor path. Similar reactions of alkynes (C2H2 [74-86-2], 1-butyne [107-00-6], 2-butyne [503-17-3], PhC.tplbond.CH [536-74-3], CF3C.tplbond.CCF3 [692-50-2], propyne [74-99-7], CH2:CHC.tplbond.CH [689-97-4]) give mainly CO and biradicals.

Polymerization of phenylpropynes

Polymerization of phenylpropynes. Hasegawa, Kan-ichi (Dep. Polymer Chem., Kyoto Univ., Kyoto, Japan). Eur. Polym. J., 13(1), 47-51 (English) 1977. CODEN: EUPJAG. DOCUMENT TYPE: Journal CA Section: 35 (Synthetic High Polymers) Cream powders (.hivin.Mn 3000-8500), e.g. polyphenylpropyne, were obtained on WCl6-Ph4Sn [595-90-4] catalyzed polymn. of phenylpropyne, p-chlorophenylpropyne, p-methylphenylpropyne, and p-methoxyphenylpropyne which occurred at rates slower than those of the corresponding phenylacetylene [536-74-3] compds. The magnitudes of the ring substituent effects on the reactivity of phenylpropyne catalyzed by WCl6 were .rho.+ = -0.96 towards a phenylacetylene propagating end and .rho.+ = -2.19 towards a styryl end indicating that the former polymn. involved metathesis and the latter was a conventional cationic polymn.Several substances like 2749-94-2 may be metioned in this study. Comparison of the reactivities of ring-substituted phenylpropynes with those of the corresponding phenylacetylenes towards a styryl cation showed that introdn. of a .beta.-Me group on phenylacetylene decreased the reactivity by a factor of 1.5-1.8. .