Nickel complexes trinuclear derivative

Heteronuclear complexes based on ferrocene-containing salicylaldimines have also been reported to be mesomorphic (224). The first investigation was carried out on the copper complexes, and for chain lengths equal to 10 and 12, the trinuclear complexes exhibited a narrow-temperature-range nematic phase. This study was later extended to other metal ions ((224) Ni, Pd, V=0, Fe—Cl, =12), and for all of them, except the nickel derivative which decomposed before clearing, a nematic phase was found (Table 73). Important reductions in... 

The other general characteristic feature of cadmium(ll) complexes with thiol derivatives is the formation of di- or trinuclear species, in which thiol sulfur atoms behave as bridging ligands. The existence of polynuclear species was observed in nickel(ll)- and zinc(ll)-cysteine systems with similar stoichiometry, but cadmium(ll) complexes have usually an octahedral geometry, while in the nickel(ll) complexes this coordination mode results in four-coordinated square planar complexes. 

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