Lewis-Base Adducts of Main Group-1 Metal-Compounds. IX. Synthesis and Structural Characterization of Adducts of the Lithium(1) Halides With N,N,N',N'-Tetramethylethylenediamine

Crystalline adducts of the lithium(I) halides, LiX (X = Cl , Br, I) with N,N,N′,N′- tetramethylethyl-enediamine (tmeda) have been synthesized and characterized by single-crystal X-ray studies. Both bromide and iodide form 1 : 1 adducts which are μ,μ-dihalo-bridged binuclear species, [( tmeda )LiX2Li( tmeda )], with four-coordinate N2LiX2 lithium environments; in addition, the iodide yields an ionic 1 : 2 adduct, [Li( tmeda )2]+I-. The chloride complex is a novel 3 : 2 polymer based an a double cubane Li6Cl6 unit solvated by chelating and bridging tmeda units.

The Dimeric Phosphinimine Complex [CdI2(HN: PPh3)2]2 Containing N-H···I Hydrogen Bonds

Triphenylphosphinimine and cadmium iodide form a complex containing the dimeric molecule [CdI2HN:PPh3]2. These dimers are centrosymmetric, with an eight membered ring containing the hydrogen bonded system N-H···I.

VI. Contributions to our knowledge of the connexion between chemical constitution, physiological action, and antagonism

This paper is divided into several parts. In th e first the authors consider the general action of ammonium salts, and show th at the action of the ammonium is considerably modified by the acid radical with which it is combined. All the ammonium salts affect the spinal cord, motor nerves, and muscles, and in advanced poisoning tend to poison all those structures. The course of poisoning varies with the salt employed. The chloride, bromide, and iodide form a series in which a stim ulant action on the cord is best m arked in the bromide, and the paralysing action upon it and upon motor nerves most strongly in the iodide.