479683-16-4

Upstream product

• 110-82-7 cyclohexane 
• 26319-33-5 pentacarbonylchromium⁽⁰⁾ 
• 199620-14-9 chromium⁽⁰⁾ hexacarbonyl 
• 53109-01-6 Cr(CO)5(⁽¹³⁾CO) 

Downstream Products

• 199620-14-9 chromium⁽⁰⁾ hexacarbonyl 

Relevant academic research and scientific papers

INFRARED SPECTROSCOPY OF EXCITED STATES AND TRANSIENTS IN PHOTOCHEMISTRY

Flash photolysis with time-resolved IR detection is used in investigations of the primary photoreactions of chromium, molybdenum, tungsten, manganese, iron, and osmium carbonyl complexes, and of the ensuing transformations of transient products in room temperature solution.The method bridges the gap to spectral data obtained at low temperatures.It provides information which has previously been inaccessible, such as detailed structural information, and kinetic data in cases where the UV-visible absorptions of the species of interest overlap.Finally, excited-state IR spectroscopy has now become feasible for many organic compounds with the most recent instrumental set-up which reaches a time resolution of >=50 ns.

Structures and kinetics of Cr(CO)5 and Cr(CO)5·H2O in cyclohexane solution. Flash photolysis study of Cr(CO)6 with infrared and visible detection

Flash photolysis of Cr(CO)6 in cyclohexane solution generates Cr(CO)5 coordinated by the solvent, i.e., Cr(CO)5·C6H12. The transient infrared spectrum obtained after flash photolysis of the monolabeled chromium hexacarbonyl, Cr(CO)5(13CO), proves that the pentacarbonylchromium fragment adopts a square-pyramidal (C4v) geometry at room temperature. The axial-equatorial bond angle, determined as 93°, indicates that the structures of Cr(CO)5 in solution and in low-temperature matrices are similar. The presence of a water trace impurity in CO-saturated cyclohexane solutions has been kinetically and spectroscopically identified. Studies in H2O/CO-saturated cyclohexane solutions show that Cr(CO)5·C6H12 is 13 times more reactive with H2O than with CO. Activation parameters for the decay of Cr(CO)5·H2O allow an estimate of 75 ± 15 kJ mol-1 for the dissociation of the H2O ligand.

Laser Flash Photolysis of M(CO)6 (M=Cr, Mo, or W) in Perfluoromethylcyclohexane. The Generation of Highly Reactive Coordinatively Unsaturated Species.

Transient species observed immediately after laser pulse (τ=5 ns, λexc=265 or 353 nm) excitation of M(CO)6 (M=Cr, Mo, or W) in perfluoromethylcyclohexane have been identified as " naked" M(CO)5.These species are extremely reactive, complexing w