Niobium oxide, stereochemistry

Table 22.2 Oxidation states and stereochemistries of compounds of vanadium, niobium and tantalum...

Table 18-B-l Oxidation States and Stereochemistries of Niobium and Tantalum...

Niobium and tantalum, though metallic in many respects, have chemistries in the V oxidation state that are very similar to those of typical non-metals. They have virtually no cationic chemistry but form numerous anionic species. Their halides and oxide halides, which are their most important simple compounds, are mostly volatile and are readily hydrolyzed. In their lower oxidation states they form an extraordinarily large number of metal-atom cluster compounds. Only niobium forms lower states in aqueous solution. The oxidation states and stereochemistries (excluding those in the cluster compounds) are summarized in Table 26-B-l. 

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