LXIX.—On magnetic rotatory power, especially of aromatic compounds

Abstract

Influence of the ortho. meta. and para. and also of the a and B positions of Irregularities in the rotations of some methylated phenolic compounds. also of some toluene and napht hylene derkatives of the dimethyltoluidines and

Thermodynamic properties of pyridine—II. Comparisons of new recommended values with the literature

“…The density reported by Holland and Smyth (67) at T=274 K is anomalously low. Otherwise, only the very old results reported by Perkin (71) for temperatures below T=290 K, and the recent studies by Gokavi et al, (72) are clearly inconsistent. Figure 7 shows representative density measurement results for pyridine for temperatures below 400 K. Results are displayed relative to values calculated with a form of the corresponding-states equation of Riedel: (73) (r/r c )=1+0.85·{1−(T/T c )}+(1.6916+0.9846·v)·{1−(T/T c )} …”

“…(1) Only the measurements by Perkin, (71) Bramley, (70) Timmermans, (25,45) Mu¨ller and Brenneis, (46) Naumova, (69) and Kovalenko and Trifonov (66) extend significantly below T =2 90 K, as shown in figure 7. The results of Timmermans (25,45) and Mu¨ller and Brenneis (46) are in good accord, while those of Perkin (not shown in the figure),…”

Thermodynamics of binary mixtures of 1,2-dichloroethane with aromatic hydrocarbons

“…The purity of the final samples was checked by density determination at 298.15 + 0.01 K which agreed to within f 0.00005 g ~m -~ with their corresponding literature values (8)(9)(10).…”

Possible precursors and products of deep hydrodesulfurization of distillate fuels

“…Densities were reported by Perkin (55) in 1896 for the T/K range a The reference state chosen for sulfur was S2(g) in the standard gaseous state. b Gas-imperfection correction included in the standard molar enthalpy of the gas.…”