Investigating the vibrational dynamics of a 17e(-) metallocarbonyl intermediate using ultrafast two dimensional infrared spectroscopy.
Ultrafast two dimensional infrared (2D-IR) spectroscopic methods have been used to study the vibrational dynamics of a transient 17e(-) metallocarbonyl species formed following photolysis of the n-propyl-cyclopentadienyl tungsten tricarbonyl dimer [(nPr-Cp)W(CO)(3)](2) in solution. A combination of ground-state 2D-IR and transient 2D-IR techniques has revealed interesting differences in the vibrational relaxation processes of the parent dimer and the monomeric photoproduct that are ascribed to changes in solvent interactions arising from the unsaturated coordination sphere of the intermediate. Additionally, the infrared spectrum of the lesser-populated gauche isomeric form of the dimer in the carbonyl-stretching region has been determined using the presence of off-diagonal peaks in the 2D-IR spectra.
Kania
Rafal
R
Dept. of Physics, University of Strathclyde, SUPA, 107 Rottenrow East, Glasgow, UKG4 0NG.
Stewart
Andrew I
AI
Clark
Ian P
IP
Greetham
Gregory M
GM
Parker
Anthony W
AW
Towrie
Michael
M
Hunt
Neil T
NT
D006536:Heptanes / Q000737:chemistry; D008752:Methylene Chloride / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000737:chemistry*; D011789:Quantum Theory; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors; D014414:Tungsten / Q000737:chemistry; D014732:Vibration
D006536:Heptanes; D009942:Organometallic Compounds; D008752:Methylene Chloride; D014414:Tungsten