The complex [V₂L₄], where HL is diphenylformamidine (see structure opposite-above), is diamagnetic. Each L⁻ ligand acts as a bridging, N;N'-donor such that the complex is structurally similar to complexes of the type [Cr₂(O₂CR)₄]. 

(a) Describe a bonding scheme for the [V₂]⁴⁺ core and derive the formal metal–metal bond order in [V₂L₄]. 

(b) The reaction of [V₂L₄] with KC₈ in THF results in the formation of K(THF)₃[V₂L₄]. What is the role of KC₈ in this reaction? 

(c) Do you expect the VV bond length to increase or decrease on going from [V₂L4] to K(THF)₃[V₂L₄]? Rationalize your answer.

Structure

Transcribed Image Text:

N IZ Diphenylformamidine (HL)