Tandem Si-C and C-H Activation for Decamethylhafnocene and Bis(trimethylsilyl)acetylene

摘要

The unusual reactivity of hafnocene complexes in comparison to their titanium and zirconium analogues was dramatically demonstrated in the recent functionalization of coordinated N2 and the coupling of CO2 and N2 to a substituted hydrazine product.The differences in their structure and bonding were also noticed;for example,the sigma and pi ratio of the diene bonding in (s-cis-eta4-diene) metallocene complexes is shifted to larger sigma character for Hf compared to Zr,thus giving shorter Hf-C than Zr-C bonds.