Synthesis and spectroscopic properties of copper(I) and silver(I) complexes with a bidentate dinitrile having two thioether sulfurs in the bridging group

The dinitrile (L), which includes two thioethereal sulfurs in the bridging group, has been synthesized in three reaction steps from 4-tert-butylthioph enol with an overall yield of 4.3%. The reaction of silver(I) hexafluoropho sphate with L leads to the silver(I) complex, AgL2PF6, while the copper(I) complex, CuL2BF4, is prepared by a ligand exchange reaction. By the usage o f the molar conductances and mass spectra, tetrafluoroborate in CuL2BF4 and hexafluorophosphate in AgL2PF6 are ionized. Judging from the IR and NMR sp ectra, the C equivalent toN group in the complexes serves as a sigma -donor and the thioethereal sulfurs in the bridging group are not coordinated to the metal atoms.