Figure 1.

Molecular structure and synthesis of the investigated complexes [M(PyC‐NMIC‐dipp)(CO)₄] with M=Cr(0), Mo(0) ^[33] and W(0) (top) as well as ORTEP representation of W (bottom). Ellipsoids are drawn with 50 % probability. Hydrogen atoms are omitted for clarity. A: 1) h$\nu$ , THF, r.t., 2 h; 2) [HL1]OTf, NEt₃, reflux, overnight; B: 1) h$\nu$ , THF, r.t., 2 h; 2) norbornadiene, reflux, 2 d; 3) [HL1]OTf, NEt₃, r.t., overnight; C: 1) h$\nu$ , CH₃CN, r.t., 2 h; 2) [HL1]OTf, NEt₃, reflux, 3 d.