Ab‐initio Powder Structure Determination of Dichloro[1,2‐ethanediylbis(iminomethylene)bis(phosphonato)]trizinc Dihydrate (Eur. J. Inorg. Chem. 5/2005)

Abstract

The cover picture shows the richness of 1,2-ethanediylbis-(iminomethylene)bis(phosphonic acid) (H 4 L) used as a ligand. The left compound is cadmium phosphonate, Cd 2 Cl 2 (H 2 O) 4 (H 2 L), in which the Cd atoms form dimers through bridging chloride ions. These dimers are, in turn, formed into rows by the phosphonate groups, and the rows are crosslinked by the organic chain of the ligand into layers. The second picture shows Zn 3 Cl 2 (H 2 L) 2 ⋅2H 2 O, in which Zn atoms are tetrahedrally coordinated. One of the Zn atoms lies in rows parallel to the b-axis, which are sandwiched between rows formed by the two other Zn atoms. The carbonϪnitrogen chains crisscross each other forming a three-dimensional structure. The structure of this latest compound is presented in the article by A. Clearfield et al. on p. 829 ff.

Converting Industrial Alkali Lignin to Biobased Functional Additives for Improving Fire Behavior and Smoke Suppression of Polybutylene Succinate

“…With regard to PNZn-lignin, as shown in Figure c, the band at 1610 cm –1 arises from the combination of stretching and bending vibrations of PO bonds, whereas the absorption peak at 1210 cm –1 is assigned to be the stretching vibration of PO bonds. Moreover, the absorption bands at 1124 and 1050 cm –1 are due to the stretching vibration of the C–N bond in P–C–N segments and the P–O bond, respectively. , Moreover, the absorption peaks at 637 and 500 cm –1 (Zn ← O) and 425 cm –1 (Zn ← N) appear in the IR spectrum of PNZn-lignin, obviously suggesting that the zinc ions are successfully introduced into the PNZn-lignin structure via the coordination reaction. , The IR results indicate that alkali lignin has been successfully functionalized by phosphorus, nitrogen, and zinc ions.…”