Synthesis and thermal behaviour of cyclopentadienylnickel(II) thiolato Schiff base complexes. Molecular structures of Ni(eta(5)-C5H5)(PBu3(SC6H4NC(H)C6H4C6H5) and Ni(eta(5)-C5H5)(PBu3)(SC6H4NC(H)C6H4OC4H9)
Rm. Moutloali et al., Synthesis and thermal behaviour of cyclopentadienylnickel(II) thiolato Schiff base complexes. Molecular structures of Ni(eta(5)-C5H5)(PBu3(SC6H4NC(H)C6H4C6H5) and Ni(eta(5)-C5H5)(PBu3)(SC6H4NC(H)C6H4OC4H9), J ORGMET CH, 629(1-2), 2001, pp. 171-181
The new complexes Ni(eta (5)-C5H5)(PR3) (SC6H4NC(H)C6H4OCnH2n+1), Ni(eta (5
)-C5H5)(PR3)(SC6H4NC(H)C6H4C6H5) and Ni(eta (5)-C5H5)(PR3)(SC6H4NC(H)C6H4OC
H2C6H5), (R = Ph or Bu; n = 4, 6, 8, 10, 14, 16 and 20), were synthesised f
rom equimolar amounts of Ni(eta (5)-C5H5)(PR3)Br (R = Ph or Bu) and the app
ropriate thiol ligand and were characterised by NMR and elemental analysis.
In addition la and 3a were characterised by single crystal X-ray diffracti
on studies. These new complexes were also examined by thermal analytical me
thods (DSC and TGA) and polarising hot-stage microscopy, but were not found
to exhibit any liquid crystalline behaviour. Thermal analysis showed that
the complexes were generally stable up to about 180 degreesC and decomposed
finally to a species with empirical formula NiSC6H5. Two decomposition pat
hways were established, depending on the phosphine used. (C) 2001 Elsevier
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