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The commercial method involves oxidation of phosphorus trichloride with oxygen: [11] 2 PCl 3 + O 2 → 2 POCl 3. An alternative method involves the oxidation of phosphorus trichloride with potassium chlorate: [12] 3 PCl 3 + KClO 3 → 3 POCl 3 + KCl
PCl 3 is a precursor to other phosphorus compounds, undergoing oxidation to phosphorus pentachloride (PCl 5), thiophosphoryl chloride (PSCl 3), or phosphorus oxychloride (POCl 3). PCl 3 as an electrophile
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The number indicates the degree of oxidation of each element caused by molecular bonding. In ionic compounds, the oxidation numbers are the same as the element's ionic charge. Thus for KCl, potassium is assigned +1 and chlorine is assigned -1. [4] The complete set of rules for assigning oxidation numbers are discussed in the following sections.
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Element Negative states Positive states Group Notes −5 −4 −3 −2 −1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 Z; 1 hydrogen: H −1 +1: 1 2 helium: He 0 18
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