Fourier transform infrared studies of atomic titanium, vanadium, chromium, iron, cobalt, nickel and copper reactions with carbon dioxide in low-temperature matrices

摘要: Titanium, vanadium, chromium, iron, cobalt, nickel, and copper metal atoms were cocondensed with CO/sub 2/ in neat matrices at 15 K. Even though a large proportion of do not react, new complexes are characterized by using FTIR techniques their infrared absorption bands assigned. It is clearly shown that highly bent these complexes. The behavior oxophile metals different from other which spontaneously form 1:1 2/. For Ti, V, Cr, the authors observe first an insertion metallic atom into CO bond, leading to formation intermediate (O)M(CO) molecule, followed fixation on this complex, (O)M(CO)(CO/sub 2/). identified products CO, M(O), M(CO)/sub n/, possibly few carbonates. Most thermally unstable decompose above 60 Only Fe Ni compounds give rise upon annealing 80 K reduction along simultaneous carbonyl Isotopic experiments /sup 13/CO/sub C/sup 18/O/sub allow them conclude geometry both matrixmore » dependent: matrices, lead C coordination, others being fixed side-on end-on manner.« less