(dme)MCl3(NNPh2) (dme = dimethoxyethane; M = Nb, Ta): A versatile synthon for [Ta - NNPh2] hydrazido(2-) complexes

Ian A. Tonks, John E. Bercaw

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11 Scopus citations


Complexes (dme)TaCl3(NNPh2) (1) and (dme)NbCl 3(NNPh2) (2) (dme =1,2-dimethoxyethane) were synthesized from MCl5 and diphenylhydrazine via a Lewis-acid assisted dehydrohalogenation reaction. Monomeric 1 has been characterized by X-ray, IR, UV-vis, 1H NMR, and 13C NMR spectroscopy and contains a κ1-bound hydrazido(2-) moiety. Unlike the corresponding imido derivatives, 1 is dark blue because of an LMCT that has been lowered in energy as a result of an Nα-Nβ antibonding interaction that raises the highest occupied molecular orbital (HOMO). Reaction of 1 with a variety of neutral, mono- and dianionic ligands generates the corresponding ligated complexes retaining the κ1-bound [Ta-NNPh2] moiety.

Original languageEnglish (US)
Pages (from-to)4648-4656
Number of pages9
JournalInorganic Chemistry
Issue number10
StatePublished - May 17 2010

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