Ultraviolet and infrared spectroscopy have been used to study the photochemistry of 1,3-cyclohexadiene (I), cis-l,3,5-hexatriene (II), and transA,3,5-hexatriene (III) suspended in argon matrices at 20°K. It was found that I photolyzed rapidly and irreversibly to II, which photolyzed slowly and irreversibly to III and several thermally unstable photo products. Various possibilities are considered for the latter and 1,2,4-hexatriene (IV) and exo-2vinylbicyclo[1.1.0]butane (XI) are suggested as likely candidates. Surprisingly, III was found to be photostable under these conditions. The photochemistry of 1,3-cyclohexadiene (I) and the valency isomeric cis-1,3,5-hexatriene (II) and Zranx-1,3,5-hexatriene (III) has been the subject of considerable interest.3 Vapor-phase photolysis of I or mixtures of II and III were reported to yield hydrogen, a mixture of C2 hydrocarbons, 1,2,4-hexatriene (IV), benzene, and polymer.4 In addition I, II, and
The electrostatic energy of diaspore has been calculated as a function of the hydroxyl-hydrogen position and the ionic charge on the aluminum, oxygen and hydrogen. The position of the hydrogen atom determined previously by neutron diffraction coincides with the minimum in the eletrostatic energy for all charge combinations which satisfy the equationsComputation of the electrostatic energy from the Born-Haber cycle suggests that the fully ionized charges (
Excited states of 80 Br have been investigated via the 76 Ge(11 B, α3n) re-October 9, 2012 23:7 WSPC-Proceedings Trim Size: 9in x 6in Wang-Shouyu 240 action and a new ∆I = 1 band has been identified which resides ∼ 400 keV above the yrast band. Based on the experimental results, a chiral character of the two bands within the πg 9/2 ⊗ νg 9/2 configuration is proposed, which provides the first evidence for chirality in the A ∼ 80 mass region.
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