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Octahedral complexes include [M(SCN) 6] 3-(M = Rh [7] and Ir [8]) and [Pt(SCN) 6] 2-. Square planar complexes include [M(SCN) 4] z-(M = Pd(II), Pt(II), [9] and Au(III)). Colorless [Hg(SCN) 4] 2-is tetrahedral. Some octahedral isothiocyanate complexes undergo redox reactions reversibly. Orange [Os(NCS) 6] 3-can be oxidized to violet [Os(NCS) 6] 2-.
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.
Clar's rule states that for a benzenoid polycyclic aromatic hydrocarbon (i.e. one with only hexagonal rings), the resonance structure with the largest number of disjoint aromatic π-sextets is the most important to characterize its chemical and physical properties. Such a resonance structure is called a Clar structure. In other words, a ...
Contributing structures of the carbonate ion. In chemistry, resonance, also called mesomerism, is a way of describing bonding in certain molecules or polyatomic ions by the combination of several contributing structures (or forms, [1] also variously known as resonance structures or canonical structures) into a resonance hybrid (or hybrid structure) in valence bond theory.
Sulfenyl thiosulfates (RSSO 3 −) react with alkali metal cyanides to give thiocyanates with displacement of sulfite. This approach has been applied to allyl thiocyanate: [6] CH 2 =CHCH 2 Cl + Na 2 S 2 O 3 → CH 2 =CHCH 2 S 2 O 3 Na + NaCl CH 2 =CHCH 2 S 2 O 3 Na + NaCN → CH 2 =CHCH 2 SCN + Na 2 SO 3. Sulfenyl chlorides (RSCl) also convert ...
It is important to note that the energy of the actual structure of the molecule, i.e. the resonance hybrid, may be lower than that of any of the contributing canonical structures. The difference in energy between the actual inductive structure and the (most stable contributing structures) worst kinetic structure is called the resonance energy ...
Methyl thiocyanate is an organic compound with the formula CH 3 SCN. The simplest member of the organic thiocyanates, it is a colourless liquid with an onion-like odor. It is produced by the methylation of thiocyanate salts. The compound is a precursor to the more useful isomer methyl isothiocyanate (CH 3 NCS). [4]
2 Hg(SCN) 2 → 2 β−HgS + CS 2 + C 3 N 4; β−HgS + O 2 → Hg + SO 2 (not all mercury sulfide decomposes) C 3 N 4 is not a product of this decomposition. Cyanogen is generally only produced when Hg(CN) 2 or similar is heated to decomposition, and early attempts to form (SCN) 2 via the same route starting at this compound failed and only ...