Recent Investigations of Psychotropic Compounds

tetrachloride in T H F produces blue-green crystals that are stable to water and to aqueous acid or alkali. The compound can be sublimed or recrystallized from benzene or toluene. The compound is pyrophoric but controlled air oxidation yields uranium oxides and cyclooctatetraene. Mass spectral analysis gives a parent peak for U(CeH& and the fragmentation pattern indicates a ferrocene-like sandwich structure. X-ray analysis 121 confirms the sandwich structure with planar 8-membered rings in a Dsh-configuration. An inspection of the possible electronic structures shows that all of the appropriate molecular orbitals of the two s-rings have symmetry that permits overlap with suitable atomic orbitals of the uranium. The relative stability of the complex to hydrolysis compared with similar sandwich complexes of cyclooctatetraene dianion with several transition elements prepared by Breil and Wilke"] suggests that additional bonding is involved in the uranium compound such as that involving the f-orbitals.