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The Unstable Species and the Isotope Effect in the Pyrolysis of Diborane in a Shock Tube
From American Chemical Society 145th National Meeting, New York, Sept. 1963. The pyrolysis of diborane was examined using a chemical shock tube as a reactor. Additional evidence for the existence of hexaborane-12 and heptaborane- 11 and -13 was obtained. The presence of a large net normal isotope effect in the formation of tetraborane and hexaborane and a net inverse isotope effect in the formation of pentaborane-9 are observed. A mechanism, consisting of a series of competitive reactions and eqailibria, in which tetraboraue is the precursor of pentaborane-11 and hexaborane but not of pentaborane-9 is shown to be compatible with the observed isotope effect. Data obtained by examining the pyrolysis of various mixtures of boron hydrides are also consistent with the mechanism. (auth)
Date:
January 1, 1963
Creator:
Fehlher, T P & Koski, W S
System:
The UNT Digital Library
Transport of Radionuclides in Fresh Water Systems. Report of a Working Meeting Held at University of Texas, Austin, January 30-February 1, 1963
Nineteen papers presented at the Conference on the Transport of Radionuclides in Fresh Water Systems are given. Separate abstracts were prepared for 18 papers; one was previously abstracted for NSA. (M.C.G.)
Date:
July 1, 1963
Creator:
Kornegay, B. H.; Vaughan, W. A.; Jamison, D. K. & Morgan, J. M., Jr.
System:
The UNT Digital Library