Rhodium(II) acetate

This dark green powder is slightly soluble in polar solvents, including water.

[2][3] The structure of rhodium(II) acetate features a pair of rhodium atoms, each with octahedral molecular geometry, defined by four acetate oxygen atoms, water, and a Rh–Rh bond of length 2.39 Å.

The water adduct is exchangeable, and a variety of other Lewis bases bind to the axial positions.

The dimer binds a number of classical Lewis bases to form 2:1 adducts: Its Lewis acidity is eclipsed by the enhanced reactivity of rhodium(II) trifluoroacetate, which even binds arenes and alkenes.

The important observation that rhodium(II) acetate catalyzes reactions of diazo compounds has led to considerable research, but mostly focused on the trifluoroacetate or chiral derivatives.

NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code