Browsing by Author "ZULOAGA, F"
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- ItemMULTIPLE SCATTERED WAVE STUDY OF THE RELATIVISTIC AND NONRELATIVISTIC ELECTRONIC-STRUCTURE AND BONDING FOR CIS-DIAMMINEDICHLOROPLATINUM(II)(1986) ZULOAGA, F; ARRATIA-PEREZ, R
- ItemSELF-INTERACTION-CORRECTED ELECTRONEGATIVITIES AND HARDNESS FOR ATOMS(1989) GOYCOOLEA, C; BARRERA, M; ZULOAGA, F
- ItemSINGLET-TRIPLET ABSORPTION AND EMISSION-SPECTRA OF SUBSTITUTED CYANOCOBALTATE(III) COMPLEXES(1977) LOEB, B; ZULOAGA, F
- ItemSTUDIES ON QUINONES .27. DIELS-ALDER REACTION OF 8,8-DIMETHYLNAPHTHALENE-1,4,5(8H)-TRIONE(1993) VALDERRAMA, JA; ARAYA-MATURANA, R; ZULOAGA, FThe Diels-Alder reaction of the title quinone 1 with various symmetrical and unsymmetrical dienes in ethanol solution is reported. The cycloaddition takes place, in all cases, across the external quinone double bond affording with cyclopentadiene, buta-1,3-diene and 2,3-dimethylbuta-1,3-diene, the corresponding adducts 3, 4 and 5. The cycloaddition of 1 with 2-methylbuta-1,3-diene and penta-1,3-diene provided 90:10 and 65:35 mixtures of regioisomers 6-7 and 17-18, respectively. Enolisation of these adduct mixtures afforded the corresponding anthracenones 10-11 and 21-22. Compounds 11 and 22, the minor components of the anthracenone mixtures, were synthesized from acetylnaphthalenes 14 and 23.