CHARACTERIZATION OF REACTION-PRODUCTS OF SEVERAL BIS(BETA-DIKETONATO)COPPER(II) COMPOUNDS WITH 1H-PYRAZOLES - ADDUCTS, DINUCLEAR AND TETRANUCLEAR COMPLEXES, AND COORDINATION POLYMERS

When [Cu(L(1))(2)] (HL(1) = aliphatic beta-diketone with branched alkyl groups) and [Cu(L(2))(2)] (HL(2) = aliphatic beta-diketone with linear alkyl groups) were allowed to react with 1H-pyrazoles (Hpzl), tetranuclear complexes [Cu-4(mu(4)-O)(L(1))(4)(mu-pzl)(2)] and dinuclear complexes [Cu-2(L(2))(2)(mu-pzl)(2)] were produced respectively, but the reactions of [Cu(L(3))(2)] (HL(3) = aroyl- or heteroaroylacetone) with 1H-pyrazole (Hpz) gave coordination polymers [{Cu(L(3))(mu-pz)}(n)] and/or adducts [Cu(L(3))(2)(Hpz)(n)] (n = 1 and/or 2). The substituent effects of the beta-diketonato ligands on the reaction products are discussed. The structure of one of the tetranuclear products [Cu-4(mu(4)-O)(dibm)(4)(mu-4-mpz)(2)] (Hdibm = 2,6-dimethylheptane-3,5-dione; 4-Hmpz = 4-methyl-1H-pyrazole) has been determined by X-ray analysis. The structures of some of the other products are estimated on the basis of their IR and diffuse reflectance spectra.