NaNb 3 O 3 F–a Niobium‐Niobium Triple Bond with “Side‐On” Coordination by Nb Atoms | Zendy

Köhler Jürgen | Zendy; Simon Arndt | Zendy

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NaNb 3 O 3 F–a Niobium‐Niobium Triple Bond with “Side‐On” Coordination by Nb Atoms

Author(s) -

Köhler Jürgen,

Simon Arndt

Publication year - 1986

Publication title -

angewandte chemie international edition in english

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 0570-0833

DOI - 10.1002/anie.198609961

Subject(s) - niobium , crystallography , ion , dumbbell , annealing (glass) , bond length , coordination number , triple bond , materials science , chemistry , crystal structure , double bond , metallurgy , polymer chemistry , medicine , organic chemistry , physical therapy

The remarkable new compound NaNb 3 O 5 F is formed on annealing NaF, Nb powder, and Nb 2 O 5 . According to an X‐ray structure analysis, Nb is present in the +4 and +2 oxidation states. The Nb 2⊕ ions form pairs and a structural group (with eight surrounding O‐atoms) as is observed in [Re 2 Cl 8 ] 2⊕ . The short d (NbNb) distance of 261.4 pm (observed for the first time in the case of Nb) is explained in terms of a triple bond. This Nb 2 dumbbell is coordinated fourfold “side‐on” by the Nb 4⊕ ions.

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