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Thiocyanogen, (SCN) 2, is a pseudohalogen derived from the pseudohalide thiocyanate, [SCN] −, with behavior intermediate between dibromine and diiodine. [2] This hexatomic compound exhibits C 2 point group symmetry and has the connectivity NCS-SCN. [3] In the lungs, lactoperoxidase may oxidize thiocyanate to thiocyanogen [4] or ...
The nitrogen atom has only 6 electrons assigned to it. One of the lone pairs on an oxygen atom must form a double bond, but either atom will work equally well. Therefore, there is a resonance structure. Tie up loose ends. Two Lewis structures must be drawn: Each structure has one of the two oxygen atoms double-bonded to the nitrogen atom.
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.
The esters of thiocyanic acid have the general structure R−S−C≡N, where R stands for an organyl group. Isothiocyanic acid, HNCS, is a Lewis acid whose free energy, enthalpy and entropy changes for its 1:1 association with a variety of Lewis bases in carbon tetrachloride solution at 25 °C have been reported.
Two examples are the deep blue [Co(NCS) 4] 2-and the green [Ni(NCS) 4] 2-. [5] Few homoleptic complexes of NCS-feature thiocyanate ligands (S-bonded). Octahedral complexes include [M(SCN) 6] 3-(M = Rh [6] and Ir [7]) and [Pt(SCN) 6] 2-. Square planar complexes include [M(SCN) 4] z-(M = Pd(II), Pt(II), [8] and Au(III)). Colorless [Hg(SCN) 4] 2 ...
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. The test has been responsible for widespread false ...
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As such, it is used as a precursor for the synthesis of pharmaceuticals and other specialty chemicals. [2] Thiocyanate salts are typically prepared by the reaction of cyanide with elemental sulfur: 8 NaCN + S 8 → 8 NaSCN. Sodium thiocyanate crystallizes in an orthorhombic cell.