Rubrocurcumin Explained

Rubrocurcumin is a red-colored dye that is formed by the reaction of curcumin and boric acid.^[1]

Synthesis

The reaction of curcumin with borates in presence of oxalic acid produces rubrocurcumin.^[2]

Characteristics

Rubrocurcumin produces a red-colored solution.

Rubrocurcumin is a neutral molecule, while rosocyanine is ionic. In rubrocurcumin, one molecule of curcumin is replaced with oxalate compared to rosocyanine.

Complexes with boron such as rubrocurcumin are called 1,3,2-dioxaborines.

Notes and References

1. Spicer . G. S. . Strickland . J. D. H. . Compounds of Curcumin and Boric Acid. Part II. The Structure of Rubrocurcumin . Journal of the Chemical Society . London . 1952 . 1952 . art. 907 . 4650–4653 . 10.1039/JR9520004650 .
2. Rohde. D. . Darstellung und Eigenschaftsuntersuchungen an 1,3,2-Dioxaborinen mit variablen Coliganden am Boratom . Presentation and characterization of 1,3,2-dioxaborins with variable coligands on the boron atom . Dissertation . 2002 . University Halle .