The preparation of several kinds of [Cu(tfa)2(Hpzl)4] (Htfa = trifluoroacetic acid; Hpzl = 1H-pyrazoles) by stoichiometric reactions of [Cu(hfac)2] (Hhfac = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione) with a pyrazole in petroleum ether is reported. As isolable intermediate of this reaction, [Cu(hfac)2(Hpzl)4] was obtained in some cases. The structure of [Cu(tfa)2(4-Hmpz)4] (1e) (4-Hmpz = 4-methyl-1H-pyrazole) has been determined by X-ray analysis. The structures of other [Cu(tfa)2(Hpzl)4] are estimated on the basis of their IR spectra.
The structure of optically active title compound was determined by X-ray diffraction. The absolute configuration is trans-δ-NH. A pair of two-fused six-membered rings is extended. The geometry of the octahedron is distorted by the presence of the six-membered chelate rings.
{Bis(3-aminopropyl)amine}(r-1 ,c-3,c-5-cyclohexanetriamine)cobalt(III) complex was prepared and the crystal structure of its iodide has been analyzed by X-ray diffraction. The complex cation has a facial configuration and an exo-type of N(secondary)–H bond orientation in bis(3-aminopropyl)amine. There is only a little distortion in the octahedron of this complex cation.
The molecular structure of the title compound was determined by X-ray diffraction. Six six-membered chelate rings formed by the r-1,c-3,c-5-cyclohexanetriamine were found to take chair-conformations. The complex ion had an approximate D3 symmetry. The presence of the six-membered chelate rings did not introduce much distortion on the octahedral geometry of the complex ion.
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