Die H�rte der Sekund�rstrahlung von Co60-?-Strahlen

Abstract

Schw/~chungskurven der in Aluminiura und Blei durch Co6~ erzeugten Sekund/irstrahlung wurden gemessen und mit der Theorie verglichen. Versuchs~nordnung (Fig. I).

The Phosphazenes (Phosphonitrilic Compounds).

“…The compound XPeClg also reported by Stokes (355) has been assigned a tricyclic structure like that of cyameluric chloride (199,200).…”

“…A comparison of the spectra of several chlorophosphazenes (NPC12)" (to = 3-7) (199,200,212) showed increased intensity of a band near 750 cm.-1 with increasing values of to (259). This was considered to be caused by a gradual decrease in the phosphorusnitrogen bond order and an increase in absorption of the P-N stretching frequency of bond order one (259).…”

“…This was considered to be caused by a gradual decrease in the phosphorusnitrogen bond order and an increase in absorption of the P-N stretching frequency of bond order one (259). The infrared spectrum of the supposedly tricyclic compound N7P6C19 has been investigated (199,200).…”

“…(mm.) References NPitOCl.35.7 102(1) n"D 1.5256 ¿3» 1.796 (27,33, 189) NP3CI12 310-315 (32) NP4Cln 200-202 (33) N2Me4PaCla 160 dec. (68,117)NjPtCl.237.5 251-261(13)(199,200,355)…”

Inorganic Polymerization Reactions II. Addition Polymerization

“…This also involves the postulation of condensed ring systems. Krause (91) has also presented evidence based on infra-red and ultraviolet absorption studies and the measurement of dipole moments in favor of ring structures for the higher homo logs. The trimeric and tetrameric compounds both show strong absorption in the infra-red in the region 1200-1300 cm-1 which in each ease has been correlated with the presence of a P=N ring system (92).…”