Yokoi, Hiroshi published the artcileESR spectra of bis(tert-butyl- and ethylacetoacetato)copper(II) complexes in various hydrocarbon solvents, SDS of cas: 14284-06-1, the publication is Bulletin of the Chemical Society of Japan (1974), 47(2), 497-8, database is CAplus.
The X-band ESR spectra of bis(tert-butyl acetoacetato)copper(II) and bis(ethyl acetoacetato)copper (II) were measured at 77°K in several noncoordinating hydrocarbon solvents. Remarkable solvent effects on dimer formation were revealed for the complexes.
Bulletin of the Chemical Society of Japan published new progress about 14284-06-1. 14284-06-1 belongs to copper-catalyst, auxiliary class Copper, name is Copper(II) ethylacetoacetate, and the molecular formula is C4H6O3, SDS of cas: 14284-06-1.
Referemce:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4660968/,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”