Photochemistry of matrix-isolated MeMn(CO)5: evidence for two isomers of MeMn(CO)4

Transition Metal Alkane Complexes†

“…The d 6 intermediates MeMn(CO) 4 and HMn(CO) 4 were characterized in low-temperature matrices following the photolysis of the pentacarbonyl precursors. , Each intermediate was present in C S and C 2 v isomeric forms and all of the fragments showed a strong interaction with the matrix hosts. The magnitude of the shifts in visible absorption maxima was greater than observed for Cr(CO) 5 .…”

Do early and late transition metal noble gas complexes react by different mechanisms? A room temperature time-resolved infrared study of (η5-C5R5)Rh(CO)2 (R = H or Me) in supercritical noble gas solution at room temperature

“…Poliakoff and Turner used matrix isolation to demonstrate that Fe(CO) 5 , when photolysed in frozen Xe at 12 K, forms the complex Fe(CO) 4 (Xe). 2 Using a similar method, Perutz and Turner 3 generated M(CO) 5 (L) (M = Cr, Mo, or W; L = Xe, Kr or Ar) from the photolysis of M(CO) 6 in matrices at 20 K. Matrix isolation has since become a powerful technique for the characterization of organometallic noble gas complexes 4 including fac-(η 2 -dfepe)Cr(CO) 3 (L) (dfepe = (C 2 F 5 ) 2 PCH 2 -CH 2 P(C 2 F 5 ) 2 ; L = Ar or Xe), 5 CH 3 Mn(CO) 4 (Ar), 6 KrMn-(CO) 5 , 7 Fe(CO) 4 Xe, 2 [KrFe(CO) 5 ] ϩ , 7 Ru(CO) 2 (PMe 3 ) 2 (L) (L = Ar or Xe) 8 and Ru(CO) 2 (dmpe)(L) (dmpe = Me 2 PCH 2 -CH 2 PMe 2 ; L = Ar or Xe). 9 Recently laser ablation and matrix isolation have been combined to characterize the first noble gas-actinide complexes, CUOL (L = Ar, Kr or Xe).…”

Manganese Alkyls and Hydrides

“…Previously postulated (93c) was thought not to be present. 119 More recent data indicate that (93a(S)) is formed directly and is itself then photoisomerized to (93b(S)). 120 Even more detailed structural information regarding these transients was obtained from a careful analysis of the v c _ H stretching band in Mn-CD 2 H derivatives, called V 1 S C _ H since the C-H stretch is isolated from Fermi resonance and coupling by the two deuteriums.…”