Formation of Metallocene-Stabilized Planar-Tetracoordinate Carbon Compounds by a Protonation Route

The structure and dynamics of cationic zirconocene complexes with phenyl coordination †

“…The value of 148 Hz is somewhat reduced with respect to the other phenylic CH-coupling constants of the same molecule (163-174 Hz), 3 but much smaller 1 J CH values of the order of 100 Hz are observed when the corresponding hydrogen atom is involved in a strong agostic bond to the metal. 23 No unambiguous decision can be made between the three η-bonded structures on the basis of the mean absolute deviations. Owing to the low barrier via TS1, the system is fluxional on the NMR timescale in the region between 2a and 2b.…”

Recent advances in planar tetracoordinate carbon chemistry

“…11 Using Hoffmann's strategy (also called the electronic approach), several ptC molecules have been proposed in silico 14,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] and/or experimentally detected. [38][39][40][41][42][43][44][45][46][47][48] A few realized compounds of nonclassical structures containing ptCs are shown in Figure 2. In order to achieve electronic stabilization they share a common feature: there is at least one atom different from carbon linked to the ptC.…”

“…[38][39][40][41][42][43][44][45][46][47][48] A few realized compounds of nonclassical structures containing ptCs are shown in Figure 2. In order to achieve electronic stabilization they share a common feature: there is at least one atom different from carbon linked to the ptC.…”

Recent Advances in Planar Tetracoordinate Carbon Chemistry

“…11 Using Hoffmann's strategy (also called the electronic approach), several ptC molecules have been proposed in silico 14,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] and/or experimentally detected. [38][39][40][41][42][43][44][45][46][47][48] A few realized compounds of nonclassical structures containing ptCs are shown in Figure 2. In order to achieve electronic stabilization they share a common feature: there is at least one atom different from carbon linked to the ptC.…”