New bis-chelate square-planar complexes of Ni(II) with enantiomeric ligands, cyclo-O,O'-(R,R)- or -(S,S)-1,2-dimethylethylene dithiophosphate ion, have been synthesized and characterized via UV-vis and CD spectroscopy and an X-ray crystal structure investigation, the results of which have been correlated. The absence of an intrinsic configurational chirality on the metal has allowed to obtain CD spectra due only to the less intense chirality induced on the Ni(II) electronic d-d transitions by the ligands outer ring conformations and absolute configuration of the 2 and 3 carbon atoms of the two chelating ligands.
Induced CD on the d-d transitions of square planar MS4 chromophoric groups of Ni(II) complexes with enantiomeric dithiophosphate ligands: (+)589(-)(CD662)Ni[(R,R)bdtp]2, and (-)589 (+)(CD662)Ni[(S,S)bdtp]2
BENEDETTI, MICHELE;
1999-01-01
Abstract
New bis-chelate square-planar complexes of Ni(II) with enantiomeric ligands, cyclo-O,O'-(R,R)- or -(S,S)-1,2-dimethylethylene dithiophosphate ion, have been synthesized and characterized via UV-vis and CD spectroscopy and an X-ray crystal structure investigation, the results of which have been correlated. The absence of an intrinsic configurational chirality on the metal has allowed to obtain CD spectra due only to the less intense chirality induced on the Ni(II) electronic d-d transitions by the ligands outer ring conformations and absolute configuration of the 2 and 3 carbon atoms of the two chelating ligands.File in questo prodotto:
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