CLXXI.—Amidechloroiodides

Abstract

IT seemed possible that when pure dry hydrogen iodide acts on the imidechloride of benzanilide, replacement of the chlorine atom by iodine might occur, and t h a t the resulting imide-iodide would then lose iodine and yield the dianil of benzil, thus : PhCC1:NPh + HI = PhC1:NPh + HC1 and 2PhCI:NPh = (PhC:NPh), + I,.We find, however, t h a t hydrogen iodide yields a n additive compound with the imidechloride, t o which we are inclined, although direct experimental evidence is wanting, t o ascribe t h e constitution of a mixed amide halide, in this case the chloroiodide corresponding mit,h benzanilide, PhCC1:NPh + HI = PhCClI*NHPh.Action of Hydrogen Iodide on Benxo~~iienylimidechloride.

Polymorphism in potassium niobate, sodium niobate, and otherABO3compounds

“…In the course of a search for new ferroelectric materials, B. T. Matthias has grown potassium niobate t (KNb08) and sodium niobate (NaNb03) crystals and found them to be ferroelectric (Matthias, 1949). The results of X-ray and optical work on these crystals, although in agreement with the original determinations of the structures as perovskite-type (Barth, 1925;Goldschmidt, 1926), were in conflict with the more recent published literature (Quill, 1932;Lapitskii, 1946),~: and they are therefore reported herewith in the first part of tiffs paper. It is expected that dielectric data on the same crystals will soon be published by B. T. Matthias and J. P. Remeika.…”

“…The three-dimensional polymorphic diagram for other than the perovskite structures will not be considered in detail in this paper, but it should be pointed out that similar relationships might be observed with the aid of such a diagram in, for example, the calcitearagonite field. Lander (1949) has shown, for example, that barium carbonate changes from the aragonite structure to the calcite structure at 803 ° C., and to a cubic (sodium chloride) structure at 976 ° C. The lower transition was also observed in strontium carbonate at 912 ° C. and in mixed crystals at various temperatures.…”

Structural Evolution of Superconductor Nanowires in Biopolymer Gels

“…TGA and DSC data (Supporting Information Fig. S5) indicated that a phase change and melting transition of barium carbonate occurred at 803 8C and 811 8C respectively, [18] and were therefore in agreement with the formation of solid solution droplets preceding Y124 crystallization. Significantly, SEM and TEM studies showed clear evidence for localized droplet-induced outgrowth from the amorphous matrix in the form of discrete bulbous extensions ( Fig.…”

The crystal structures of NiO.3BaO, NiO.BaO, BaNiO3and intermediate phases with composition near Ba2Ni2O5; with a note on NiO

“…Current papers (Lander, 1951;Lander & Wooten, 1951) discuss the preparation and properties of barium-nickel oxides. Compounds containing nickel in a valence state higher than two are particularly interesting because relatively little is known about them.…”