99356-50-0

Upstream product

• 65940-45-6 N,N'-ethylenebis(α-phenylsalicylideneiminate) 
• 536-80-1 iodosylbenzene 
• 99356-22-6 [7,7'-diphenyl-N,N'-ethylenebis(salicylideneaminato)]chromium(III)triflate dihydrate 
• 98736-79-9 Cr(O)(OC₆H₄C(C₆H₅)NCH₂CH₂NC(C₆H₅)C₆H₄O)⁽¹⁺⁾*CF₃SO₂O^(1-)=(Cr(O)(OC₆H₄C(C₆H₅)NCH₂CH₂NC(C₆H₅)C₆H₄O))OSO₂CF₃ 
• 56-34-8 tetraethylammonium chloride 

Relevant academic research and scientific papers

Synthesis and molecular structure of oxochromium(V) cations. Coordination with donor ligands

Synthesis of various oxochromium(V) cations ligated with salen [N,N′-ethylenebis(salicylideneaminato)], i.e. O=Cr(salen)+, is readily achieved from the corresponding chromium(III) complex, (salen)Cr+, by oxygen atom transfer with either iodosylbenzene or m-chloroperbenzoic acid. X-ray crystallographic analysis of O=Cr(salen)+ indicates that the the 5-coordinate Cr atom is situated 0.53 ? above the salen (mean) plane and describes a square-pyramidal configuration with the oxo ligand occupying the apical position. Isotopic 18O-substitution leads to a shift in the O=Cr stretching frequency from 1004 to 965 cm-1 in accord with theoretical predictions. Similarly the magnetic susceptibility and the well-resolved isotropic ESR spectra reliably reflect the d1 electron configuration of the oxochromium(V) species in acetonitrile solutions. Oxochromium(V) and various donor ligands such as pyridine N-oxide, triphenylphosphine oxide, and water form 1:1 association complexes, the formation constants K of which vary from 10-2 to 103 M-1, depending on the donor ligand and the substituent groups located on the salen periphery. X-ray crystallographic determination of the pyridine N-oxide adduct O=Cr(salen)(Opy)+ indicates that the donor ligand fills the apical position in O=Cr(salen)+ to complete the octahedral coordination about Cr. Isotopic 18O-tracer studies of the formation of oxochromium(V) by oxygen atom transfer to the chromium(III) complex are described. From X-ray crystallography, the lattice parameters for the oxochromium(V) complex IIc are as follows: space group, P21/n, monoclinic; cell constants, a = 16.233 (2) ?, b = 6.439 (1) ?, c = 19.523 (4) ?, β = 94.44 (1)°, V = 2034.5 ?3; Z = 4. The lattice parameters of the pyridine N-oxide adduct of the oxochromium(V) complex IIf are as follows: space group, P43212, tetragonal; cell constants, a = 11.938 (1) ?, c = 43.366 (9) ?, V =6174 ?3; Z = 8.