Exploring the solid state and solution structural chemistry of the utility amide potassium hexamethyldisilazide (KHMDS)

Ana I. Ojeda-Amador, Antonio J. Martínez-Martínez, Gemma M. Robertson, Stuart D. Robertson, Alan R. Kennedy, Charles T. O'Hara

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
48 Downloads (Pure)


The structural chemistry of eleven donor complexes of the important Brønsted base potassium 1,1,1,3,3,3-hexamethyldisilazide (KHMDS) has been studied. Depending on the donor, each complex adopted one of four general structural motifs. Specifically, in this study the donors employed were toluene (to give polymeric 1 and dimeric 2), THF (dimeric 3), N,N,N',N'-tetramethylethylenediamine (TMEDA) (dimeric 4), (R,R)-N,N,N',N'-tetramethyl-1,2-diaminocyclohexane [(R,R)-TMCDA] (dimeric 5), 12-crown-4 (dimeric 6), N,N,N',N'-tetramethyldiaminoethyl ether (TMDAE) (tetranuclear dimeric 8 and monomeric 10), N,N,N',N',N''-pentamethyldiethylentriamine (PMDETA) (tetranuclear dimeric 7), tris[2-dimethyl(amino)ethyl]amine (Me6TREN) (tetranuclear dimeric 9) and tris{2-(2-methoxyethoxy)ethyl}amine (TMEEA) (monomeric 11). The complexes were also studied in solution by 1H and 13C NMR spectroscopy as well as DOSY NMR spectroscopy.
Original languageEnglish
Pages (from-to)6392-6403
Number of pages12
JournalDalton Transactions
Issue number19
Early online date3 May 2017
Publication statusPublished - 15 May 2017


  • structural chemistry
  • Brønsted base potassium
  • structural motifs
  • spectroscopic analysis

Cite this