Pmr spectra of the tris(bipyridine-N,N′-dioxide)nickel(II) and cobalt(II) cations [Ni(bipyO 2) 3 2+ and Co (bipyO 2) 3 2+ are reported and the isotropic shifts are attributed to a dominating π delocalization mechanism onto the aromatic phenyl rings. The ratio method has been used to factor the cobalt isotropic shifts into their contact and dipolar components and, concurrently, to obtain detailed structural information about the ligand conformation in solution. The angle between the two tipped phenyl rings of the chelated bipyO 2 molecule has been determined to be 67°. © 1970.
A PMR investigation of the paramagnetic tris(bipyridine-N,N′-dioxide)Nickel(II) and cobalt(II) complexes Inorganica Chimica Acta / Bertini I.; Gatteschi D.; Wilson L.J.. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 4:(1970), pp. 629-631.
A PMR investigation of the paramagnetic tris(bipyridine-N,N′-dioxide)Nickel(II) and cobalt(II) complexes Inorganica Chimica Acta
BERTINI, IVANO;GATTESCHI, DANTE;
1970
Abstract
Pmr spectra of the tris(bipyridine-N,N′-dioxide)nickel(II) and cobalt(II) cations [Ni(bipyO 2) 3 2+ and Co (bipyO 2) 3 2+ are reported and the isotropic shifts are attributed to a dominating π delocalization mechanism onto the aromatic phenyl rings. The ratio method has been used to factor the cobalt isotropic shifts into their contact and dipolar components and, concurrently, to obtain detailed structural information about the ligand conformation in solution. The angle between the two tipped phenyl rings of the chelated bipyO 2 molecule has been determined to be 67°. © 1970.
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