The photolysis of dichlorotriphenylbismuth(V) in chloroform.
Under 254 nm irradiation in chloroform, Bi(C6H5)3Cl2 reacts to yield HBiCl4 and H2BiCl5, in contrast to its behavior in acetonitrile, in which bismuth metal appears to be the eventual product, unless anhydrous HCl is present, in which case H2BiCl5 is also formed. The photolysis in CHCl3 is not significantly solvent-initiated. The rate depends directly on the light intensity absorbed by the metal complex, and the quantum yield is 0.026. In CCl4 a portion of the reaction occurs through absorption of light by the solvent.
The synthesis and properties of highly organosoluble metal(II) complexes with hydrazone ligands derived from pivaloylacetonitrile
Abstract Using pivaloylacetonitrile as starting material and coupling component, a novel hydrazone ligand and four, highly organosoluble metal(II) complexes were synthesized via the procedure of oximation, cyclization, diazotization, coupling and metal chelation. In addition to elemental analysis, the structures of the novel compounds were postulated based on a series of spectroscopic methods. Smooth thin films of these metal(II) complexes on K9 glass substrates were prepared by spin-coating from 2,2,3,3-tetrafluoro-1-propanol solutions. The behaviour and relationships of the absorption bands both in solution and in spin-coated films are discussed; the thermal properties, photostability and the solubility of the metal(II) complexes were investigated. The synthesized Ni(II) complex exhibited a remarkable combination of excellent solubility and photostability, suitable absorption band and desirable thermal properties and, therefore, offers the potential of becoming a recording material for the recordable blu-ray disc system.
The preparation of 210Bi by a Szilard-Chalmers reaction
Results are reported for the yields and enrichment factors in the production of carrier-free Bi/sup 210/ from irradiated triphenyl bismuth and triphenyl bismuth dichloride. Solvent extraction and retention on a zinc reductor column were used to separate the Bi/sup 210/. Enrichment factors of up to 840 were obtained, and the best method of preparing enriched Bi/sup 210/ was from pure triphenyl bismuth using ammonical 2% disodium salt of EDTA as aqueous extractant. (D.L.C.)