Category: nitriles-buliding-blocks. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Pyridine-4-thiol, is researched, Molecular C5H5NS, CAS is 4556-23-4, about Anion-Recognition Studies of a Rhenium(I) 4-Mercaptopyridine Compound and Its Ligand-Coupling Products. Author is Tzeng, Biing-Chiau; Lin, I-Lin; Chen, Wen-Hui; Lee, Gene-Hsiang.
The reaction of Re(CO)5Cl with 4-mercaptopyridine (4-PySH) gave [Re(CO)3(4-HPyS)3]Cl (1), showing three hydrogen-bonding donors of 4-PySH ligands as well as a characteristic ligand-to-metal charge-transfer absorption at ∼380 nm. In this regard, a variety of anions, i.e., CN-, OAc-, F-, Cl-, Br-, I-, PF6-, NO3-, ClO4-, and H2PO4-, were examined to study anion-recognition studies through hydrogen-bonding functionalities. Upon the addition of CN- to a methanolic solution of complex 1, a remarkable spectral change with an isosbestic point at ∼314 nm in the absorption spectra was observed, with a binding constant (Kb) calculated to be 24770 M-1. Also, the OAc- anion also shows a similar trend, but a mild spectral change, with Kb calculated to be 2170 M-1. Unlike those of CN- and OAc-, the addition of F-, Cl-, Br-, and I- anions causes a less pronounced spectral change with an isosbestic point at ∼350 nm and Kb calculated to be 2863-750 M-1. However, almost no spectral change can be observed for other anions (i.e., PF6-, NO3-, H2PO4-, and ClO4-). The mol. loops of [Re(CO)3Cl(Py2S2)]2 (2; Py2S2 = 4,4′-dipyridyl disulfide) and [Re(CO)3Cl(Py2S)0.35(Py2S2)0.65]2 (3; Py2S = 4,4′-dipyridyl sulfide) can be isolated and structurally characterized by x-ray diffraction, where those crystals were grown from di-Et ether diffusion into a methanolic solution of complex 1 with [Bu4N]CN and [Bu4N]NO3, resp. Such unusual ligand-coupling reactions toward the homoligand and hybrid-ligand loops of complexes 2 and 3 can be achieved at room temperature
There is still a lot of research devoted to this compound(SMILES：SC1=CC=NC=C1)Category: nitriles-buliding-blocks, and with the development of science, more effects of this compound(4556-23-4) can be discovered.
Reference:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts