37818-31-8Relevant academic research and scientific papers
K×××F/O interactions bridge copper(I) fluorinated alkoxide complexes and facilitate dioxygen activation
Lum, June S.,Tahsini, Laleh,Golen, James A.,Moore, Curtis,Rheingold, Arnold L.,Doerrer, Linda H.
, p. 6374 - 6384 (2013)
Seven E[Cu(OR)2] copper(I) complexes (E=K+, {K(18C6)}+ (18C6=[18]crown-6), or Ph4P+; R=C4F9, CPhMeF2, and CMeMe F2) have been prepared and their reactivity with O 2 studied. The K[Cu(OR)2] species react with O2 in a copper-concentration-dependent manner such that 2:1 and 3:1 Cu/O 2 adducts are observed manometrically at -78 °C. Analogous reactivity with O2 is not observed with the {K(18C6)}+ or Ph4P+ derivatives. Solution conductivity data demonstrate that these K[Cu(OR)2] complexes do not behave as 1:1 electrolytes in solution. The K+ ions induce aggregation of multiple [Cu(OR) 2]- units through K×××F/O interactions and thereby effect irreversible O2 reduction by multiple Cu centers. Bond valence analyses for the potassium cations confirm the dominance of the fluorine interactions in the coordination spheres of K+ ions. Intramolecular hydroxylation of ligand aryl and alkyl C-H bonds is observed. Nucleophilic reactivity with CO2 is observed for the oxygenated Cu complexes and a CuII carbonate has been isolated and characterized. Copyright
