Ueber die Radicale der aromatischen Alkohole (des Benzoë‐, Cumin‐ und Anisalkohols)

Cannizzaro, S.; Rossi, A. R.

doi:10.1002/jlac.18621210213

Cited by 15 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A minute variation in thickness across the cell was of slight concern, since in measuring both cell thickness and light absorption an average value was obtained; variation from top to bottom caused a gradation in density across the spectrum, however, and was avoided. 4 The empty cell after adjusting as above, was held at the slit of a spectrograph and illuminated by a powerful continuous light source. 5 The spectrum of the empty cell was photographed and adjacent to it the mercury arc spectrum.…”

Section: Techniquementioning

confidence: 99%

See 1 more Smart Citation

The Absorption Spectra of a Series of Organic Molecular Compounds.

Hunter¹,

Northey²

1933

J. Phys. Chem.

View full text Add to dashboard Cite

Pfeiffer (1) and others have investigated the colored molecular compounds resulting from quiñones with aromatic hydrocarbons, ethers, or amines. Pfeiffer has classified these compounds with the quinhydrones and has shown that a series extends from the intensely colored quinhydrones existing as crystalline compounds, through colored complexes difficult to crystallize, to complexes impossible to crystallize and identified largely by a slight color change on mixing the liquid components. These latter "molecular compounds" are tied by forces which are weak in comparison with the intermolecular forces in the crystals of the components, for, on cooling, the components of the mixture crystallize out separately. Foreign solvents tend to dissociate the compounds and as a result Beer's law does not hold.We undertook a spectroscopic study of the more weakly tied compounds of this type in the hope of extending the series of molecular compounds to loosely tied complexes which had escaped detection because the color change occurred in the ultra-violet or was too slight to be seen with the eye. There was also the possibility that the "solvent effect" of absorption spectroscopy could be linked with these color changes. Foremost, however, there was the hope that a correlation between color and oxidation-reduction potentials might be established. RESULTSWe have carried out quantitative light absorption measurements on the five quiñones-chloroquinone, benzoquinone, toluquinone, xyloquinone, and duroquinone-in a melted state and in the absence of any solvent.The resulting curves are compared with the light absorption of equimolecular mixtures of these quiñones with various aromatic ethers, hydrocarbons, and the junior author after the death of Dr. Hunter in 1931.-L. I. Smith.

show abstract

Section: Techniquementioning

confidence: 99%

“…. 4. The changes from the absorption spectra of quiñones in a pure state to the spectra in molecular compound forming "solvents" have been correlated with the known oxidation-reduction potentials of the quiñones.…”

Section: Techniquementioning

confidence: 99%