Electron spin resonance spectra and structure of Al(C sub 6 H sub 6 ) hydrocarbon matrices

Journal Article · Wed Oct 11 04:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00203a004· OSTI ID:6663723

Howard, J A; Joly, H A; Mile, B ^[1]

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1. National Research Council of Canada, Ottawa, Ontario (Canada)

Reactions of Al atoms with benzene at 77 K in benzene and inert hydrocarbon matrices on a rotating cryostat have been studied by ESR spectroscopy. A monoligand complex, Al(C{sub 6}H{sub 6}), is the only paramagnetic product, and at 4 K the ESR spectrum shows resolvable hyperfine interactions with one aluminum and two equivalent protons and has the following magnetic parameters in adamantane: a{sub x}(Al) = 56 MHz, a{sub y}(Al) = a{sub z}(Al) = 14 MHz, a{sub x}(2H) = a{sub y}(2H) = a{sub y}(2H) = a{sub z}(2H) = 27 MHz, g{sub x} = 2.0010, g{sub y} = 1.9970, and g{sub z} = 2.0060. The spectrum changes with an increase in temperature and at 220 K is more consistent with an interaction with six equivalent protons with parameters a{sub Al} = 9.5 MHz, a{sub H}(6) = 5.3 MHz, and g = 2.0010. Two alternative bonding schemes are discussed.

• OSTI ID: 6663723
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 111:21; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALUMINIUM COMPLEXES
AROMATICS
BENZENE
CALCULATION METHODS
COMPLEXES
DATA
DATA ANALYSIS
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
HYDROCARBONS
HYPERFINE STRUCTURE
INFORMATION
LOW TEMPERATURE
MAGNETIC RESONANCE
MEASURING INSTRUMENTS
MEASURING METHODS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANOMETALLIC COMPOUNDS
RESONANCE