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Thiocyanate [6] is known to be an important part in the biosynthesis of hypothiocyanite by a lactoperoxidase. [7] [8] [9] Thus the complete absence of thiocyanate or reduced thiocyanate [10] in the human body, (e.g., cystic fibrosis) is damaging to the human host defense system.
Thiocyanate complexes are not widely used commercially. Possibly the oldest application of thiocyanate complexes was the use of thiocyanate as a test for ferric ions in aqueous solution. [15] The reverse was also used: testing for the presence of thiocyanate by the addition of ferric salts. The 1:1 complex of thiocyanate and iron is deeply red.
Nickel(II) thiocyanate is a coordination polymer with formula Ni(SCN) 2. [1] It is a green-brown solid and its crystal structure was determined first in 1982. [1]
Strontium thiocyanate refers to the salt Sr(SCN) 2.It is a colorless solid. According to X-ray crystallography, it is a coordination polymer.The Sr 2+ ions are each coordinated to eight thiocyanate anions in a distorted square antiprismatic molecular geometry where each square face contains two adjacent S atoms and two adjacent N atoms.
In methyl thiocyanate, N≡C and C−S distances are 116 and 176 pm. By contrast, N=C and C=S distances are 117 and 158 pm in isothiocyanates. [7] Typical bond angles for C−S−C are 100°. [3] By contrast C−N=C in aryl isothiocyanates is 165°. Again, the thiocyanate isomers are quite different with C−S−C angle near 100°.
Cobalt(II) thiocyanate is an inorganic compound with the formula Co(SCN) 2. [1] The anhydrous compound is a coordination polymer with a layered structure. The trihydrate , Co(SCN) 2 (H 2 O) 3 , is a isothiocyanate complex used in the cobalt thiocyanate test (or Scott test ) for detecting cocaine .
Copper(II) thiocyanate (or cupric thiocyanate) is a coordination polymer with formula Cu(SCN) 2. [1] It is a black solid which slowly decomposes in moist air. [ 2 ] It was first reported in 1838 by Karl Ernst Claus and its structure was determined first in 2018.
Mercury(II) thiocyanate (Hg(SCN) 2) is an inorganic chemical compound, the coordination complex of Hg 2+ and the thiocyanate anion. It is a white powder. It is a white powder. It will produce a large, winding "snake" when ignited, an effect known as the Pharaoh's serpent .