Jump to main content
Jump to site search

Issue 10, 2018
Previous Article Next Article

Stable coordination complexes of α-diimines with Nb(V) and Ta(V) halides

Author affiliations


Uncommon examples of coordination compounds of high valent transition metals with α-diimines were obtained and characterized by IR and NMR spectroscopy, X-ray diffraction and/or DFT analysis. The 1 : 1 molar reactions of NbF5 with a selection of α-diimines afforded the ionic compounds [NbF4(DADR)2][NbF6] (DADR = DADDip, 1a; DADXyl, 1b; DADMes, 1c) in 80–90% yields. The addition of DADDip to NbOCl3 gave NbOCl3(DADDip), 7 (62% yield). [MBr4(DADDip)][MBr6] (M = Nb, 7a; M = Ta, 7b) were afforded in moderate yields from MBr5 and DADDip. The reactions of NbCl5 with DADDip and DADXyl proceeded with non-selective activation of the organic substrate affording complex mixtures of products, including the quinoxalinium salt [{2,6-C6H3(CHMe2)2}N(CH)2NCC(CHMe2)(CH)3C][NbCl6], 2, the Nb(IV) coordination complex NbCl4(DADDip), 3, the N-(monoprotonated) α-diimine salts [DADDip(H)][MCl6], 4a–b, and the iminomethyl-imidazolium [(2,6-C6H3Me2)NCHCHN(2,6-C6H3Me2)CCHN(2,6-C6H3Me2)][NbCl6], 5.

Graphical abstract: Stable coordination complexes of α-diimines with Nb(v) and Ta(v) halides

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Jan 2018, accepted on 24 Jan 2018 and first published on 09 Feb 2018

Article type: Paper
DOI: 10.1039/C8DT00122G
Citation: Dalton Trans., 2018,47, 3346-3355
  •   Request permissions

    Stable coordination complexes of α-diimines with Nb(V) and Ta(V) halides

    N. Bartalucci, M. Bortoluzzi, G. Pampaloni, C. Pinzino, S. Zacchini and F. Marchetti, Dalton Trans., 2018, 47, 3346
    DOI: 10.1039/C8DT00122G

Search articles by author