| Autor: |
Baldamus, Jens, Berghof, Christiane, Cole, Marcus L., Evans, David J., Hey-Hawkins, Evamarie, Junk, Peter C. |
| Zdroj: |
Journal of the Chemical Society, Dalton Transactions; November 14, 2002, Vol. 2002 Issue: 22 p4185-4192, 8p |
| Abstrakt: |
Treatment of N,N'-di(tolyl)formamidines ((Tol)NC(H)N(H)(Tol)) HFTolP (TolP = para-tolyl) and HFTolM (TolM = meta-tolyl) with potassium hydride affords the colourless crystalline formamidinate complexes [{K2(FTolP)2(THF)3}∞], 1, and [{(K2(FTolM)2(THF)3)·THF}∞], 2 when conducted in THF. An analogous HFTolP preparation in 1,2-dimethoxyethane yields the DME analogue of 1; [{K(FTolP)(DME)}∞], 3, whilst treatment of HFTolP with potassium hydride in toluene followed by stoichiometric addition of 18-crown-6 gives monomeric [K(FTolP)(18-crown-6)], 4. Compounds 14 have been characterised by spectroscopy (1H NMR, 13C NMR and FTIR) and single crystal XRD. In the solid-state 13 display one-dimensional polymeric structures that exhibit μ-η2:η2-coordinated formamidinates. These approach η3-diazaallyl contact by virtue of dinuclear bridging. Compound 4, the first example of a poly-ether crown adducted monomeric Group 1 amidinate, exhibits both inter- and intra-molecular CH⋯O hydrogen bonding in the solid-state. Supramolecularly, this renders 4 a two-dimensional hydrogen-bonded polymer. Complexes 14 are discussed with respect to known potassium benzamidinate/guanidinate complexes and related amido-2-pyridyl ligand species. |
| Databáze: |
Supplemental Index |
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