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Ring molecules with several sulfide (–S–) groups From Wikipedia, the free encyclopedia
In organic chemistry, thia-crown ethers are organosulfur compounds which are the thia analogues of crown ethers (cyclic polyethers). That is, they have a sulfur atom (sulfide linkage, −S−) in place of each oxygen atom (ether linkage, −O−) around the ring. While the parent crown ethers have the formulae (CH2CH2O)n, the parent thia-crown ethers have the formulae (CH2CH2S)n, where n = 3, 4, 5, 6. They have trivial names "x-ane-Sy",[citation needed] where x and y are the number of atoms in the ring and the number of those atoms that are sulfur, respectively. Thia-crown ethers exhibit affinities for transition metals.
1,4,7-Trithiacyclononane (9-ane-S3) is a tridentate ligand and forms complexes with many metal ions, including those considered hard, such as copper(II) and iron(II).[1]
Tetradentate 14-ane-S4[2] and the hexadentate 18-ane-S6[3] are also known.
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