Metallophilic interactions in polynuclear Ag(I) complex with 1-methylhydantoin studied by X-ray absorption, electronic and vibrational spectroscopies

Abstract Argentophilic interaction has been studied in silver methylhydantoin complex {[Ag(1-methylhydantoin)]·0.5H 2 O} n using electronic, Raman and X-ray absorption spectroscopies strengthened theoretically. The EXAFS confirmed coordination number (CN = 3) of complex and metalophilic interactions. The digital filter analysis of electronic spectra revealed that broad bands at ca 38 000 cm −1 and ca 45 000 cm −1 observed in the solid state and solutions, respectively, were composed of two transitions, namely L–L( π  →  π ∗ ) and Ag–Ag tentatively assigned to (4d σ ∗  → 5p σ ) in silver ion. The Raman spectroscopy data showed a new band at 83 cm −1 assigned to ν(Ag 2 ) vibration theoretically supported by DFT.