Spectral Investigations of Metal Complexes of β-Diketones. I. Nuclear Magnetic Resonance and Ultraviolet Spectra of Acetylacetonates
A report of proton resonance and ultraviolet spectra of a broad range of metal ion complexes of acetylacetone is presented. The n.m.r. spectra of diamagnetic complexes provide no support for the postulate of benzenoid resonance in the chelate rings, as has been suggested by Calvin nor are any great differences in electron density at the unique carbon atom in the ring indicated. Definitive ultraviolet spectra of thirty acetylacetone complexes are reported. All of these data in general and particularly in certain comparisons indicate that the electrostatic model of Beiford, et al., cannot account for the variation in energy of the presumed pi - pi /sup */ transition. The energy of this transition cannot be correlated with any simple parameter of the complexed metal ion, and it is believed that it is determined by several such parameters, among which is the ability of the metal ion to participate in d pi -p pi overlap with the pi system of the chelate ring.
- Research Organization:
- Massachusetts Inst. of Tech., Cambridge
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-13-002770
- OSTI ID:
- 4275741
- Journal Information:
- Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 21 Vol. 80; ISSN 0002-7863
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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THE CHEMISTRY OF URANYL ACETYLACETONE COMPLEX
Related Subjects
ABSORPTION
ACETIC ACID
ACETONE
ACETYL RADICALS
ACETYLACETONE
ATOMIC MODELS
BENZENE
BINDING ENERGY
CARBON
CHELATES
COMPOUNDS
CONFIGURATION
DISTRIBUTION
ELECTRONS
ELECTROSTATICS
ESTERS
IONS
KETONES
MAGNETISM
MATHEMATICS
MEASURED VALUES
METALS
MOLECULES
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANOMETALLICS
SALTS
SPECTRA
SPECTROSCOPY
TABLES
ULTRAVIOLET RADIATION
URANIUM COMPLEXES
VALENCE
VALENCE ELECTRONS