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One of the main sources of perchlorate contamination from natural nitrate fertilizer use was found to come from the fertilizer derived from Chilean caliche (calcium carbonate), because Chile has rich source of naturally occurring perchlorate anion. [74] Perchlorate concentration was the highest in Chilean nitrate, ranging from 3.3 to 3.98%. [51 ...
The tetrahedral molecule methane (CH 4)Aside from virtually all saturated organic compounds, most compounds of Si, Ge, and Sn are tetrahedral. Often tetrahedral molecules feature multiple bonding to the outer ligands, as in xenon tetroxide (XeO 4), the perchlorate ion (ClO − 4), the sulfate ion (SO 2− 4), the phosphate ion (PO 3− 4).
Sodium perchlorate is an inorganic compound with the chemical formula Na Cl O 4. It consists of sodium cations Na + and perchlorate anions ClO − 4 . It is a white crystalline, hygroscopic solid that is highly soluble in water and ethanol .
The term can also refer to chemical compounds containing this anion, with chlorates being the salts of chloric acid. Other oxyanions of chlorine can be named "chlorate" followed by a Roman numeral in parentheses denoting the oxidation state of chlorine: e.g., the ClO − 4 ion commonly called perchlorate can also be called chlorate(VII).
Tetrahedral SiO 4 units are found in olivine minerals, (Mg,Fe) 2 SiO 4, but the anion does not have a separate existence as the oxygen atoms are surrounded tetrahedrally by cations in the solid state. Phosphate (PO 3− 4), sulfate (SO 2− 4), and perchlorate (ClO − 4) ions can be found as such in various salts.
The preparation of perchlorate complexes can be challenging because perchlorate is a weakly coordinating anion. Chlorine trioxide is an important precursor to anhydrous perchlorate complexes. It serves as a source of ClO + 2 and ClO − 4.
These solids consist of the perchlorate anion linked via hydrogen bonds to H 2 O and H 3 O + centers. [9] An example is hydronium perchlorate. Perchloric acid forms an azeotrope with water, consisting of about 72.5% perchloric acid. This form of the acid is stable indefinitely and is commercially available. Such solutions are hygroscopic. Thus ...
In term of chemical kinetics, perchlorate is a non-labile species because of a high activation energy hindering its redox reactivity. This can be partially explained by the shielding of the central chlorine (+7) atom by the four surrounding oxygen atoms. The ionic radius of the perchlorate anion is about the same as this of the iodide anion ...