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Mineral trioxide aggregate (MTA) is an alkaline, cementitious dental repair material. MTA is used for creating apical plugs during apexification, repairing root perforations during root canal therapy, and treating internal root resorption.
Iridium acetylacetonate is the iridium coordination complex with the formula Ir(O 2 C 5 H 7) 3, which is sometimes known as Ir(acac) 3. The molecule has D 3 -symmetry. [ 2 ] It is a yellow-orange solid that is soluble in organic solvents.
3 in hydrochloric acid, is often used as a starting material for the synthesis of other Ir(III) compounds. [2] Another compound used as a starting material is ammonium hexachloroiridate(III), (NH 4) 3 IrCl 6. In the presence of air, iridium metal dissolves in molten alkali-metal cyanides to produce the Ir(CN) 3− 6 (hexacyanoiridate) ion.
Organoiridium compounds share many characteristics with those of rhodium, but less so with cobalt. Iridium can exist in oxidation states of -III to +V, but iridium(I) and iridium(III) are the more common. iridium(I) compounds (d 8 configuration) usually occur with square planar or trigonal bipyramidal geometries, whereas iridium(III) compounds (d 6 configuration) typically have an octahedral ...
Applications include their use as NMR "shift reagents" and as catalysts for organic synthesis, and precursors to industrial hydroformylation catalysts. C 5 H 7 O − 2 in some cases also binds to metals through the central carbon atom; this bonding mode is more common for the third-row transition metals such as platinum(II) and iridium(III).
The formula Al(CH 3 CO 2) 3 indicates the presence of aluminium centres in the +3 oxidation state and acetate groups in a ratio of 1:3. Images used to represent this substance, such as those shown at left, represent two highly oversimplified approximations of the solid-state structure: the first is as a purely ionic salt with a single aluminium(III) cation (Al 3+) surrounded by and associated ...
Europium(III) acetate is a pale pink solid that can crystallize from an aqueous solution as the tetrahydrate, which is dried with sulfuric acid to give the trihydrate. [64] The reaction of europium(III) nitrate and oxalic acid gave europium oxalate decahydrate, which was converted to pentahydrate at 100 °C.
Ruthenium(III) acetate, commonly known as basic ruthenium acetate, [1] describes a family of salts where the cation has the formula [Ru 3 O(O 2 CCH 3) 6 (OH 2) 3] +.A representative derivative is the dihydrate of the tetrafluoroborate salt [Ru 3 O(O 2 CCH 3) 6 (OH 2) 3]BF 4 (H 2 O) 2, which is the source of the data in the table above. [2]