Search results
Results from the WOW.Com Content Network
Two forms are generally recognized, α-Mn 2 O 3 and γ-Mn 2 O 3, [10] although a high pressure form with the CaIrO 3 structure has been reported too. [ 11 ] α-Mn 2 O 3 has the cubic bixbyite structure, which is an example of a C-type rare earth sesquioxide ( Pearson symbol cI80, space group Ia 3 , #206).
Manganese(II) sulfide is a chemical compound of manganese and sulfur. It occurs in nature as the mineral alabandite (isometric), rambergite (hexagonal), and recently found browneite (isometric, with sphalerite-type structure, extremely rare, known only from a meteorite).
Manganese(II,III) oxide is the chemical compound with formula Mn 3 O 4. Manganese is present in two oxidation states +2 and +3 and the formula is sometimes written as MnO·Mn 2 O 3. Mn 3 O 4 is found in nature as the mineral hausmannite.
The structure of MnSO 4 ·H 2 O has been determined by X-ray crystallography (see figure). The tetrahydrate also features Mn(II) in an O 6 coordination sphere provided by bridging two sulfate anions and four aquo ligands. [3]
In Mn(CH 3) 2 (dmpe) 2, Mn(II) is low spin, which contrasts with the high spin character of its precursor, MnBr 2 (dmpe) 2 (dmpe = (CH 3) 2 PCH 2 CH 2 P(CH 3) 2). [38] Polyalkyl and polyaryl derivatives of manganese often exist in higher oxidation states, reflecting the electron-releasing properties of alkyl and aryl ligands. One example is [Mn ...
The main purpose of chemical nomenclature is to disambiguate the spoken or written names of chemical compounds: each name should refer to one compound. Secondarily, each compound should have only one name, although in some cases some alternative names are accepted. Preferably, the name should also represent the structure or chemistry of a compound.
SO 3 is the anhydride of H 2 SO 4. Thus, it is susceptible to hydration: SO 3 + H 2 O → H 2 SO 4 (Δ f H = −200 kJ/mol) [12] Gaseous sulfur trioxide fumes profusely even in a relatively dry atmosphere owing to formation of a sulfuric acid mist. SO 3 is aggressively hygroscopic. The heat of hydration is sufficient that mixtures of SO 3 and ...
Manganese(III) phosphate is an inorganic chemical compound of manganese with the formula MnPO 4. It is a hygroscopic purple solid that absorbs moisture to form the pale-green monohydrate, [ 1 ] though the anhydrous and monohydrate forms are typically each synthesized by separate methods.