Name: 2-Mercapto-5-methylbenzimidazole. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 2-Mercapto-5-methylbenzimidazole, is researched, Molecular C8H8N2S, CAS is 27231-36-3, about Strong intra- and intermolecular aurophilic interactions in a new series of brilliantly luminescent dinuclear cationic and neutral Au(I) benzimidazolethiolate complexes. Author is Schneider, Jacob; Lee, Young-A.; Perez, Javier; Brennessel, William W.; Flaschenriem, Christine; Eisenberg, Richard.
The structural and photophys. properties of a new series of cationic and neutral Au(I) dinuclear compounds bridged by bis(diphenylphosphino)methane (dppm) and 5-X-substituted benzimidazolethiolate (X-BIT) ligands, where X = H (a), Me (b), OMe (c), and Cl (d), have been studied. Monocationic complexes [Au2(μ-X-BIT)(μ-dppm)](CF3CO2) (1) were prepared by the reaction of [Au2(μ-dppm)](CF3CO2)2 with 1 equiv of X-BIT in excellent yields. The cations 1a-1d possess similar mol. structures, each with a linear coordination geometry around the Au(I) nuclei, as well as relatively short intramol. Au(I)···Au(I) separations ranging between 2.88907(6) Å for 1d and 2.90607(16) Å for 1a indicative of strong aurophilic interactions. The cations are violet luminescent in CH2Cl2 solution with a λemmax of ca. 365 nm, assigned as ligand-based or metal-centered (MC) transitions. Three of the cationic complexes, 1a, 1b and 1d, exhibit unusual luminescence tribochromism in the solid-state, in which the photoemission is shifted significantly to higher energy upon gentle grinding of microcrystalline samples with ΔE = 1130 cm-1 for 1a, 670 cm-1 (1b), and 870 cm-1 (1d). The neutral dinuclear complexes [Au2(μ-X-BIT)(μ-dppm)] (2a-2d) were formed in good yields by the treatment of a CH2Cl2 solution of cationic compounds 1a-1d with NEt3. Complexes 2a-2d aggregate to form dimers having substantial intra- and intermol. aurophilic interactions with unsupported Au(I)···Au(I) intermol. distances in the range of 2.8793(4)-2.9822(8) Å, compared with intramol. bridge-supported separations of 2.8597(3)-2.9162(3) Å. Complexes 2a-2d exhibit brilliant luminescence in the solid-state and in DMSO solution with red-shifted λemmax energies in the range of 485-545 nm that are dependent on X-BIT and assigned as ligand-to-metal-metal charge transfer (LMCT) states based in part on the extended Au···Au interactions.
There is still a lot of research devoted to this compound(SMILES：SC1=NC2=CC(C)=CC=C2N1)Name: 2-Mercapto-5-methylbenzimidazole, and with the development of science, more effects of this compound(27231-36-3) can be discovered.
Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem