Abstract
Deposits given by condensing resistively heated yttrium metal into cyclohexane and adamantane matrices under high vacuum and at 77 K on a rotating cryostat have been examined by EPR spectroscopy. The principle paramagnetic products under these conditions are YO in at least two distinct trapping sites and yttrium clusters, Yn, where n= 5 or 7. Analysis of the yttrium hyperfine interaction for YO indicates that the unpaired electron has 60% metal 5s character with the remainder of the unpaired spin in oxygen, matrix and metal p and 4d orbitals. An yttrium cluster, Yn, is produced in adamantane that is tumbling freely or pseudorotating above 205 K and has ca. 10% unpaired spin in the Y 5s orbital with the rest pressumed to be in metal 4d orbitals. A different Y cluster is formed in cyclohexane that could be a rigid pentemer or septemer with a trigonal bipyamidal or pentagonal bipyramidal structure. It is tentatively suggested that Y5 is formed in adamantane and that Y7 is formed in cyclohexane.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call