English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Lithiated amidines: Syntheses and structural characterisations

MPS-Authors
There are no MPG-Authors in the publication available
External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Barker, J., Barr, D., Barnett, N. D. R., Clegg, W., Cragg-Hine, I., Davidson, M. G., et al. (1997). Lithiated amidines: Syntheses and structural characterisations. Journal of the Chemical Society, Dalton Transactions, (6), 951-955. doi:10.1039/a605849c.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-B8E6-A
Abstract
The reaction of a toluene solution of PhNC(Ph)NHPh
(N,N'-diphenylbenzamidine) with n-butyllithium gave the toluene-solvated
amidinolithium compound {Li[PhNC(Ph)NPh]}n. Similarly the same
reaction performed in the presence of the Lewis-base donors
(Me2N)3PO (hmpa), Me2N(CH2)2NMe2 (tmen) or
[Me2N(CH2)2]2 (pmdien) yielded the am{Li[PhNC(Ph)NPh·hmpa]}2 2, {Li[PhNC(Ph)NPh]·tmen} 3 and
{Li[PhNC(Ph)NPh]. pmdien} 4 respectively. In addition the reaction of a
toluene solution of the related amidine
PhNC(Me)NHPh (N,N′-diphenylacetamidine) with LiBu in the presence of
hmpa afforded {Li[PhNC(Me)NPh]·hmpa}2 5. The solid-state structures
of 2-5, which have been resolved by single-crystal X-ray diffraction
methods, show both similarities and differences The complexes 3 and 4,
which contain the di- and tri-dentate ligands tmen and pmdien
respectively, are monomeric, whilst use of the unidentate Lewis base
hmpa results in dimers 2 and 5. However, the way in which dimerisation
is achieved differs. The co-ordination geometry about the lithium cation
is clearly influenced by the choice of donor and as such shows how
change in the denticity of the donor ligand utilised can have a
significant effect on the solid-state structure of the system.