AbstractDer Titelligand Lwird aus 3,3‐Dimethyl‐l ,5,8,l 1‐tetraazacyclotridecen‐(1)‐ Ni(II)‐tetrachlorozinkat durch Reaktion mit Na‐bicarbonat, Reduktion mit Na‐tetrahydridoborat, Reaktion mit Na‐cyanid sowie Ätherextraktion als Hydroperchlorat synthetisiert.

The preparation of the cyclic tetra-secondary amine 3,3-dimethyl-1,5,8,11-tetra-azacyclotridecane from the previously reported nickel(II) complex is described. Cobalt(III) complexes of the amine were prepared with the amine in planar (bcde-octahedral) and folded (abcd-octahedral) co-ordination. Derivatives of the complex cobalt cation in three configurations arising from restricted inversion at the four chiral co-ordinated secondary amino-groups were prepared. The relative stabilities of the possible configurations in planar and folded coordination are discussed, and assignments of configuration of the observed forms are made, based on chemical and physical (particularly 1H n.m.r. spectral) properties.

Nickel(II) complexes of 3,3-dimethyl- and 2,4,4-trimethyl-1,5,8,11-tetra-azacyclotrideca-1-ene and 3,3-dimethyl-1,5,8,11-tetra-azacyclotridecane are described. Singlet ground-state square-planar complexes are formed with poorly co-ordinating anions such as tetrachlorozincate. Triplet ground-state 'octahedral' complexes are formed with the co-ordinating anions oxalate, acetate, acetylacetonate (all as chelates) with thiocyanate and azide, and with diaminoethane. The three cations exist as configurational isomers, arising from restricted inversion at the asymmetric co-ordinated secondary amine centres.

AbstractDie Komplexkationen (I) (dargestellt aus Tetrachloro‐tris‐[triäthylentetramin]‐ dinickel) und ,der Komplex (II), der durch Hydrierung des Produktes (Ia) erhalten wird, existieren mit wenig koordinierend" wirkenden Anionen wie Tetrachlorozincat als quadratisch‐planare Komplexe.