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Vanadium(V) oxide (vanadia) is the inorganic compound with the formula V 2 O 5.Commonly known as vanadium pentoxide, it is a dark yellow solid, although when freshly precipitated from aqueous solution, its colour is deep orange.
Organovanadium compounds find only minor use as reagents in organic synthesis but are significant for polymer chemistry as catalysts. [17] Vanadocene dichloride is a versatile starting reagent and has applications in organic chemistry. [18] Vanadium carbonyl, V(CO) 6, is a rare example of a paramagnetic metal carbonyl. Reduction yields V (CO) −
Phases with the general formula V n O 2n+1 exist between V 2 O 5 and VO 2. Examples of these phases include V 3 O 7, V 4 O 9 and V 6 O 13. [1] Phases with the general formula V n O 2n−1 exist between VO 2 and V 2 O 3. [1] Called Magnéli phases for Arne Magnéli, [2] they are examples of crystallographic shear compounds based on the rutile ...
Ammonium metavanadate is the inorganic compound with the formula NH 4 VO 3. It is a white salt, although samples are often yellow owing to impurities of V 2 O 5. It is an important intermediate in the purification of vanadium. [2]
The chemistry of vanadium is noteworthy for the accessibility of the four adjacent oxidation states 2–5. In an aqueous solution, vanadium forms metal aquo complexes of which the colors are lilac [V(H 2 O) 6] 2+, green [V(H 2 O) 6] 3+, blue [VO(H 2 O) 5] 2+, yellow-orange oxides [VO(H 2 O) 5] 3+, the formula for which depends on pH. Vanadium ...
In chemistry, a vanadate is an anionic coordination complex of vanadium. Often vanadate refers to oxoanions of vanadium , most of which exist in its highest oxidation state of +5. The complexes [V(CN) 6 ] 3− and [V 2 Cl 9 ] 3− are referred to as hexacyanovanadate(III) and nonachlorodivanadate(III), respectively.
Vanadium(II) oxide is the inorganic compound with the idealized formula VO. It is one of the several binary vanadium oxides. It adopts a distorted NaCl structure and contains weak V−V metal to metal bonds. VO is a semiconductor owing to delocalisation of electrons in the t 2g orbitals.
Vanadium(IV) oxide or vanadium dioxide is an inorganic compound with the formula VO 2.It is a dark blue solid. Vanadium(IV) dioxide is amphoteric, dissolving in non-oxidising acids to give the blue vanadyl ion, [VO] 2+ and in alkali to give the brown [V 4 O 9] 2− ion, or at high pH [VO 4] 4−. [4]