Tetrachlorobis tetrahydrofuran niobium IV , NbCl4 thf

A 125-mL Erlenmeyer flask equipped with a magnetic stirring bar is charged with 1.6 g aluminum powder and 50 mL dry acetonitrile. To this suspension is added with stirring 4.8 g (18mmole) niobium tetrachloride. After stirring under 

The product is a pale-yellow, air-sensitive powder which melts at 145°C after slow color change. Its infrared spectrum contains a sharp peak of medium intensity at 990 cm 1 and a strong, broad peak at 820 cm.  

The product is a white, crystalline solid which does not melt below 250°. An infrared spectrum of the solid contains a strong, sharp peak at 1010 cm 1 and a stronger but broader peak at 855 cm 1. 

ONE-DIMENSIONAL TETR AC YANOP LATIN ATE COMPLEXES CONTAINING PLATINUM-ATOM CHAINS 

Metal-chain complexes containing stacked square-planar tetracyanoplatinate groups, [Pt(CN)4]2 , are currently of high interest because of their one-dimensional (very anisotropic ) metallic properties. Complexes of this type contain metal-atom chains and often possess a characteristic brilliant, metallic luster. They may be synthesized by oxidation using chemical or electrolytic techniques.1 Although these compounds often appear metallic, they may also be semiconductors. These complexes differ in their Pt-Pt intrachain separations, degree of partial oxidation of the platinum atom (Pt2-1 2 4), electrical conductivity, and metallic color.2 Compounds in this series which contain platinum atoms in a nonintegral oxidation state are known as partially oxidized tetra-cyanoplatinate (POTCP) complexes. Some complexes also possess a metallic luster but are not metallic, as is the case for Tl4(C03)[Pt(CN)4] (see below). 

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