Accession Number : AD0702549

Title :   COMPETITIVE REACTIONS OF THE EXCITED OXYGEN ATOMS, O(singlet D),

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF CHEMISTRY

Personal Author(s) : Paraskevopoulos,G. ; Cvetanovic,R. J.

Report Date : 01 MAY 1969

Pagination or Media Count : 7

Abstract : Competitive interaction of O(singlet D) atoms, formed by photolysis of N2O at 2139 A, with neopentane and a number of other gases has been studied at room temperature. Formation of the ground-state oxygen atoms, O(triplet P), in these experiments was followed by measuring the characteristic products of their addition to butene-1. It was found that under the conditions employed SF6 and He did not interact with O(singlet D), H2, CH4, and neopentane reacted to form products but did not deactivate O(singlet D), while N2, Xe, CO and CO2 deactivated O(singlet D) to O(triplet P). The rates of these processes, relative to the rate of reaction of O(singlet D) with neopentane, k5/k2, were determined from the decrease in the yields of neopentanol when another gas was added. Where a comparison is possible, the trend is in good agreement with the previous results from this laboratory obtained in very different systems. Carbon monoxide does not show an exalted reactivity toward O(singlet D) atoms and, moveover, does not, under the conditions employed, chemically react with them to form CO2 but deactivates them to the ground state, O(triplet P). (Author)

Descriptors :   (*OXYGEN, CHEMICAL REACTIONS), (*NITROGEN OXIDES, *PHOTOLYSIS), ATOMS, ATOMIC ORBITALS, ALKENES, ADDITION REACTIONS, CANADA

Subject Categories : Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE