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

Argentophilic interaction has been studied in silver methylhydantoin complex {[Ag(1-methylhydantoin)]center dot 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 38000 cm(-1) and ca 45000 cm(-1) observed in the solid state and solutions, respectively, were composed of two transitions, namely L-L(pi -> pi*) and Ag-Ag tentatively assigned to (4d sigma* -> 5p sigma) in silver ion. The Raman spectroscopy data showed a new band at 83 cm(-1) assigned to v(Ag-2) vibration theoretically supported by DFT. (C) 2014 Elsevier B. V. All rights reserved.