An EPR study of the reaction of {sup 69}Ga atoms with ethylene in hydrocarbon matrices
- Steacie Institute for Molecular Sciences, Ottawa (Canada)
- Laurentian Univ., Sudbury, Ontario (Canada)
- Univ. of Wales, Cardiff (United Kingdom)
The reaction of {sup 69}Ga atoms with ethylene in adamantane on a rotating cryostat at 77 K has been studied by EPR spectroscopy. The major paramagnetic product is the Ga atom-ethylene {pi} complex {sup 69}Ga[C{sub 2}H{sub 4}] that has the magnetic parameters {vert_bar}a{sub xx}(69){vert_bar} = 242 MHz, {vert_bar}a{sub zz}(69){vert_bar} = 82 MHz, {vert_bar}a{sub yy}(69){vert_bar} = 100 MHz, g{sub xx} = 2.0031, g{sub zz} = 1.9807, and g{sub yy} = 2.0107 and has an unpaired spin population of {approximately}0.56 in the Ga 4p{sub x} orbital. These parameters are almost identical to those of {sup 69}Ga[C{sub 2}H{sub 4}] in argon at 4 K and confirm that this complex has a {sup 2}B{sub 1} electronic ground state in the point group C{sub 2v}. There is also a quartet of almost isotropic transitions in the spectrum with the parameters {vert_bar}a{sub {parallel}}(69){vert_bar} = 1669 MHz, {vert_bar}a{sub {perpendicular}}(69){vert_bar} = 1698 MHz, g{sub {parallel}} = 1.9955, and g{perpendicular} = 1.9839 that have been tentatively assigned to the cyclic {sigma}-bonded complex gallacyclopentane, GaCH{sub 2}CH{sub 2}CH{sub 2}CH{sub 2}. 22 refs., 2 figs., 1 tab.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 379464
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 3 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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