Fig. 4. Top views of optimized structures for (a) (^acriPNP)NiCl,¹¹ (b) 4-Naph, (c) (^acriPNP)Ni(1-naphthyl), (d) (^acriPNP)Ni(9-anthracenyl), (e) 4-pTol, (f) 4-mTol, (g) 4-oTol and (h) (^acriPNP)Ni(benzyl) obtained from DFT calculations; distances between atoms in Å.