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The 'H n.m.r. spectra of the tetraethylammonium tetrakis-N,N-diethyldithiocarbamatolanthanate-(111), Et4N+ Ln(dtc);, ion pairs in acetonitrile solution, where Ln = Pr, Nd, Tb, Dy, Ho, Er, Tm and Yb, have been measured at various temperatures. The temperature dependences of the paramagnetic shifts of the Ln(dtc), anion are interpreted in terms of both a T-' and a T-2 contribution.It is shown that a treatment due to Bleaney satisfactorily accounts for the T-2 contribution. It is suggested that there is a significant contact contribution which is reflected in the T-' term.* In this paper we will confine our discussion to the resonances of the Ln(dtc); anions. Those

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Aus der Reaktion von Ni‐Salzen mit Schiffschen Basen (I) in Äthanol, Acetonitril oder THF werden abhängig von den Reaktionsbedingungen die Komplexe (II), (III), (IV) und (V) isoliert.