Matrix isolation and transient absorption studies of [bis[bis(pentafluoroethyl)phosphino]ethane]tetracarbonylchromium: intermolecular alkane complexes and intramolecular F-coordination

Unravelling the Photochemical Transformations of Chromium(I) 1,3 Bis(diphenylphosphino), [Cr(CO)4(dppp)]+, by EPR Spectroscopy

“…12 With respect to Cr(0) tetracarbonyl complexes, Perutz et al performed very detailed transient absorption studies on the phototransformations of the (bis(bis(penta-fluoroethyl)phosphino)ethane) tetracarbonyl chromium complex. 15 Photoactivation of Cr(I) complexes by UV was also observed by researchers at SASOL, using the same alkylaluminum cocatalyst as used here. 16 complex following UV irradiation, accounting for the observed loss of Cr(I) centers.…”

“…Despite the widely studied chemistry of these tetracarbonyl chromium-bis­(diphenylphosphino)­amine complexes, particularly from the perspective of catalysis, what remains sparsely studied to date is the photochemistry of these Cr­(I) systems. The photochemistry, photophysics, and photoelectrochemistry of metal carbonyl complexes have, in general, been studied extensively over the years, − and for example, the loss of a carbonyl ligand from Cr­(CO) 6 is one of the fastest photochemically induced processes known, occurring on a femtosecond time scale . With respect to Cr(0) tetracarbonyl complexes, Perutz et al performed very detailed transient absorption studies on the phototransformations of the (bis­(bis­(penta-fluoroethyl)­phosphino)­ethane) tetracarbonyl chromium complex .…”

“…The photochemistry, photophysics, and photoelectrochemistry of metal carbonyl complexes have, in general, been studied extensively over the years, − and for example, the loss of a carbonyl ligand from Cr­(CO) 6 is one of the fastest photochemically induced processes known, occurring on a femtosecond time scale . With respect to Cr(0) tetracarbonyl complexes, Perutz et al performed very detailed transient absorption studies on the phototransformations of the (bis­(bis­(penta-fluoroethyl)­phosphino)­ethane) tetracarbonyl chromium complex . Photoactivation of Cr­(I) complexes by UV was also observed by researchers at SASOL, using the same alkylaluminum cocatalyst as used here .…”

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).…”

The characterisation and reactivity of (η5-C5H5)M(CO)3(Xe) (M = Nb or Ta) in solution at room temperature

“…1 Matrix isolation has subsequently been used to characterise a wide range of organometallic noble gas complexes. [2][3][4][5][6] Although matrix isolation is a powerful technique for the characterisation of unstable species at low temperature, it does not provide any kinetic information quantifying the reactivity of these species at room temperature.…”