Search results
Results From The WOW.Com Content Network
Maleic anhydride is produced by the V 2 O 5-catalysed oxidation of butane with air: C 4 H 10 + 4 O 2 → C 2 H 2 (CO) 2 O + 8 H 2 O. Maleic anhydride is used for the production of polyester resins and alkyd resins. [15] Phthalic anhydride is produced similarly by V 2 O 5-catalysed oxidation of ortho-xylene or naphthalene at 350–400 °C. The ...
The oxidation states are also maintained in articles of the elements (of course), and systematically in the table {{Infobox element/symbol-to-oxidation-state}}
From left: [V(H 2 O) 6] 2+ (lilac), [V(H 2 O) 6] 3+ (green), [VO(H 2 O) 5] 2+ (blue) and [VO(H 2 O) 5] 3+ (yellow).. Vanadium compounds are compounds formed by the element vanadium (V). The chemistry of vanadium is noteworthy for the accessibility of the four adjacent oxidation states 2–5, whereas the chemistry of the other group 5 elements, niobium and tantalum, are somewhat more limited to ...
Oxidation states are typically represented by integers which may be positive, zero, or negative. In some cases, the average oxidation state of an element is a fraction, such as 8 / 3 for iron in magnetite Fe 3 O 4 . The highest known oxidation state is reported to be +9, displayed by iridium in the tetroxoiridium(IX) cation (IrO + 4). [1]
The oxidation states are also maintained in articles of the elements (of course), and systematically in the table {{Infobox element/symbol-to-oxidation-state}}
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.
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.
The following oxidation–reduction tree for a simple ionic compound, AX, where A is a cation and X is an anion, summarizes the various ways in which intrinsic defects can form. Depending on the cation-to-anion ratio, the species can either be reduced and therefore classified as n-type , or if the converse is true, the ionic species is ...