33154-48-2Relevant academic research and scientific papers
Substituent effects in cationic bis(arene)chromium compounds. Electronic and electron spin resonance spectra and an x-ray structure of bism.3.5-triisodrodvlbenzenechromiumfn iodide
Li, Tomi Ting-Tung,Kung, Wei-Jen,Ward, Donald L.,McCulloch, Beth,Brubaker Jr., Carl H.
, p. 1229 - 1235 (2008/10/08)
For a series of monosubstituted bis(arene)chromium cations, the UV ligand-metal charge-transfer (LMCT) bands and electron spin resonance (ESR) parameters do not depend on the nature or ring substituents. However, as the number of electron-donating groups on the arene ring are increased inductive effects become more significant. X-ray crystallography 'has been applied to determine the molecular structure of bis(l,3,5-triisopropylbenzene)chromium(I) iodide. The staggered conformation was found to be stabilized by steric factors. Crystal data for bis-(l,3,5-triisopropylbenzene)chromium(I) iodide are as follows: space group PI (triclinic), unit-cell dimensions a = 9.988 (3) A, b = 16.199 (3) A, c = 9.479 (2) A, a = 91.08 (2)°, β = 106.92 (2)°, and y = 96.33 (2)°, and pcalcd = 1.340 g cm 3 for Z = 2. The final R factor is 0.037 for 5358 observed independent reflections. The ring angle at the substituted carbon has an average value of 118.6°, consistent with the electron-donating nature of isopropyl groups as predicted by Domenicano28 for uncomplexed benzene rings.
