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Vanadium(III) phosphates lacking the oxo ligand have the formula VPO 4 •H 2 O and VPO 4 •2H 2 O. The monohydrate is isostructural with MgSO 4 •H 2 O [8] It adopts the structure of the corresponding hydrated aluminium phosphate. Oxidation of VPO 4 •H 2 O yields the two-electron electroactive [9] material ε-VOPO 4 [10]
A portion of the structure of Cu 3 P, highlighting the highly crosslinked nature common to many transition metal phosphides (Cu = orange, P = purple). In chemistry, a phosphide is a compound containing the P 3− ion or its equivalent. Many different phosphides are known, with widely differing structures. [1]
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 the +5 oxidation state. [ 1 ]
Oxyphosphides are chemical compounds formally containing the group PO, with one phosphorus and one oxygen atom. The phosphorus and oxygen are not bound together as in phosphates or phosphine oxides, instead they are bound separately to the cations (metals), and could be considered as a mixed phosphide-oxide compound.
Vanadium forms oxides in the +2, +3, +4 and +5 oxidation states, forming vanadium(II) oxide (VO), vanadium(III) oxide (V 2 O 3), vanadium(IV) oxide (VO 2) and vanadium(V) oxide (V 2 O 5). Vanadium(V) oxide or vanadium pentoxide is the most common, being precursor to most alloys and compounds of vanadium, and is also a widely used industrial ...
Its structure is shown in the illustration. Since the ends are condensed, its formula has one less H 2 O (water) than tripolyphosphoric acid. The general formula of a phosphoric acid is H n−2x+2 P n O 3n−x+1, where n is the number of phosphorus atoms and x is the number of fundamental cycles in the molecule's structure; that is, the minimum ...
With further heating a binary calcium phosphide is formed. [4] Other compounds may also lose hydrogen as well as phosphine. [6] Phosphanides can react with CCl 4 to substitute Cl for H giving a -PCl 2 compound. Similarly CBr 4 can produce -PBr 2. Also AgBF 4 can react to yield -PF 2. [7]
Phosphate esters have the general structure P(=O)(OR) 3 feature P(V). Such species are of technological importance as flame retardant agents, and plasticizers. Lacking a P−C bond, these compounds are in the technical sense not organophosphorus compounds but esters of phosphoric acid. Many derivatives are found in nature, such as ...