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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.
Resonance structures of the thiocyanate ion. ... Most complexes of SCN-, however are mixed ligand species. Mentioned above is one example, [Co(NH 3) 5 (NCS)] 2+.
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.
HSAB is an acronym for "hard and soft (Lewis) acids and bases".HSAB is widely used in chemistry for explaining the stability of compounds, reaction mechanisms and pathways. It assigns the terms 'hard' or 'soft', and 'acid' or 'base' to chemical species.
The chelate effect increases as the number of chelate rings increases. For example, the complex [Ni(dien) 2)] 2+ is more stable than the complex [Ni(en) 3)] 2+; both complexes are octahedral with six nitrogen atoms around the nickel ion, but dien (diethylenetriamine, 1,4,7-triazaheptane) is a tridentate ligand and en is bidentate. The number of ...
Ammonium thiocyanate is stable in air; however, upon heating it isomerizes to thiourea: The equilibrium mixtures at 150 °C and 180 °C contain 30.3% and 25.3% (by weight) thiourea, respectively. When heated at 200 °C, the dry powder decomposes to ammonia, hydrogen sulfide, and carbon disulfide, leaving a residue of guanidinium thiocyanate.
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 ...
The structure of Cu(SCN) 2 was determined via powder X-ray diffraction and consists of chains of Cu(NCS) 2 linked together by weak Cu–S–Cu bonds into two-dimensional layers. It can be considered a Jahn–Teller distorted analogue of the mercury thiocyanate structure-type. Each copper is octahedrally coordinated by four sulfurs and two ...