Notizen: Untersuchungen an Organoselen-Verbindungen II

Organoselenium and Organotellurium Compounds: Toxicology and Pharmacology

“…The selenium group can be introduced in an organic substrate via both nucleophilic and electrophilic reagents. Organoselenium anions are a powerful nucleophile and usually they are prepared in situ because of their sensitivity to air oxidations . They can be prepared from diaryl diselenides by reaction with reduction agents, of which NaBH 4 is the most used, from insertion of elemental selenium into lithium and Grignard reagents, and from diorganoyl diselenides by reduction using alkali metals or alkali hydrides …”

Five-coordination. III. Trigonal-bipyramidal nickel(II) complexes with a phosphorus-selenium tetradentate ligand

“…The more polarizable these equatorial ligand atoms are, the more covalent will be the ligand-metal bond, i.e., the more mixing of ligand and metal orbitals there will be, making the formal d-d transition of the metal ion (20) QAS is tris(o-diphenylarsinophenyl) arsine, As(o-C6H4As(CeHs)2)3, prepared by Dr. L. M. Venanzi and co-workers. 22,220 (2150), " All of the complexes are diamagnetic, are not hygroscopic, and appear to be stable in air. 6 For approximately 10~3 M nitromethane solutions at 25°.…”