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- W1597788691 abstract "Cryptotanshinone was isolated from tanshinone III as a Fe (III) complex. The cryptotanshinone-Fe (III) complex was obtained by mixing anhydrous FeCl3 with cryptotanshinone in glacial acetic acid, and it decomposed to its original components on addition of water. Elemental analysis and measurements of the molar conductance, molecular weight and infrared and far-infrared spectra of this complex suggested that it is an equimolar complex [Fe (cryptotanshinone) Cl3] in which cryptotanshinone is a bidentate ligand of the o-quinone type. This complex exhibited an absorption maximum at 560 nm in benzene, and was shown to have a 1 : 1 composition by the continuous variation, slope ratio and molar ratio methods. Similar complexes of related compounds were also 1 : 1. The apparent stability constants of these complexes, measured by molar ratio method, were compared ; results suggested that the ether oxygen of cryptotanshinone contributes to the stability of this complex." @default.
- W1597788691 created "2016-06-24" @default.
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- W1597788691 date "1977-01-01" @default.
- W1597788691 modified "2023-09-27" @default.
- W1597788691 title "Studies on metal complex formation in solution. I. Cryptotanshinone-FeCl3 complex." @default.
- W1597788691 doi "https://doi.org/10.1248/cpb.25.2477" @default.
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