Bis(N,N′-diphenylformamidine)silver(I) triflate: A three-coordinate silver formamidine compound stabilized by intramolecular hydrogen bonds

Article abstract of DOI:10.1016/S0277-5387(96)00496-2

A formally three-coordinate silver(I) complex, Ag(HDPhF)₂(OSO₂CF₃) (1), has been prepared from the reaction of AgSO₃CF₃ with HDPhF (HDPhF = N,N′-diphenylformamidine) in toluene and characterized through spectroscopic methods and single-crystal X-ray diffraction studies. The silver atom is bound through one nitrogen atom each to two neutral formamidine ligands and weakly coordinated to the triflate anion through an oxygen atom. The AgN₂O group is practically planar with an N - Ag - N angle of 142.3(2)° and O - Ag - N angles of 122.4(2) and 92.0(1)°. Hydrogen bonding possibly related to the mechanism of formamidine cleavage seen in other complexes occurs between oxygen atoms of the triflate anion and amine hydrogen atoms in 1.