Bis 4-imino-2-pentanonato nickel II

Bis(4-imino-2-pentanonato)nickel(II), synthesis 60 Tris(ethylenediamine)platinum(IV) chloride, synthesis 62 cis-Dichloro(ethylenediamine)platinum(Il), synthesis 63 cis- and Tetrachlorobis(diethyl sulfide)platinum(IV), synthesis 64... 

Bis(4-imino-2-pentanonato)nickel(II) crystallizes from a benzene-petroleum ether mixture as dark red needles or as fine red-orange needles. The two forms have identical melting points. The compound is very soluble in chloroform, but less soluble in benzene, pyridine, and carbon tetrachloride, and very insoluble in water. The compound crystallizes from pyridine without adduct formation. The compound is diamagnetic and apparently has the trans configuration. Partial resolution in optically active fractions has been achieved by means of a chromatographic technique. Molecular weight determinations indicate that the compound is monomeric in chloroform and benzene solution. The visible absorption spectrum of this compound in chloroform is characterized by a band centered at 552 m/i (e = 43). The ultraviolet absorption maxima for solutions in 1 1 benzene-petroleum ether occur at 298, 348, and 364 m x (e = 4150, 4760, and 4460, respectively). ... 

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