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Rhodium is a chemical element ... Rhodium (from Greek: ῥόδον rhodon, meaning ... Heating a methanolic solution of hydrated rhodium trichloride with sodium ...
Despite the complexity of its solutions, hydrated rhodium trichloride is the precursor to a wide variety of complexes prepared in high yields.These complexes generally arise by substitution reactions, whereby of water and chloride are replaced by more basic ligands as described in the sections below. These reactions are facilitated by the fact ...
This complex was first prepared from hexamethyl Dewar benzene and RhCl 3 (H 2 O) 3. [3] [4] [5] The hydrohalic acid necessary for the ring-contraction rearrangement is generated in situ in methanolic solutions of the rhodium salt, and the second step has been carried out separately, confirming this mechanistic description. [6]
Methanol and its vapours are flammable. Moderately toxic for small animals – Highly toxic to large animals and humans (in high concentrations) – May be fatal/lethal or cause blindness and damage to the liver, kidneys, and heart if swallowed – Toxicity effects from repeated over exposure have an accumulative effect on the central nervous system, especially the optic nerve – Symptoms may ...
Wilkinson's catalyst (chloridotris(triphenylphosphine)rhodium(I)) is a coordination complex of rhodium with the formula [RhCl(PPh 3)], where 'Ph' denotes a phenyl group. It is a red-brown colored solid that is soluble in hydrocarbon solvents such as benzene, and more so in tetrahydrofuran or chlorinated solvents such as dichloromethane .
Rhodocenium hexafluorophosphate forms after reaction of cyclopentadiene and rhodium(III) chloride hydrate in methanol following work-up with methanolic ammonium hexafluorophosphate; the reaction yield exceeds 60% with only 30 seconds of exposure to microwave radiation.
A metal ion in aqueous solution or aqua ion is a cation, dissolved in water, of chemical formula [M(H 2 O) n] z+. The solvation number , n , determined by a variety of experimental methods is 4 for Li + and Be 2+ and 6 for most elements in periods 3 and 4 of the periodic table .
Because of their relevance to hydroformylation catalysis, rhodium carbonyls have been systematically studied to a high degree. The instability of Rh 2 (CO) 8 has been a source of curiosity. The analogous binary carbonyl of cobalt, Co 2 (CO) 8, is well known. Solutions of Rh 4 (CO) 12 under high pressures of CO convert to the dirhodium compound: [5]