Dinitrogen coordination to a family of bis(cyclopentadienyl)titanium sandwich complexes, (η 5-C 5Me 4R) 2Ti (R = alkyl, aryl, silyl), has been systematically evaluated by in situ solution infrared spectroscopy. The maximum temperature of N 2 coordination (T max) has been determined as a function of cyclopentadienyl substituent and has been correlated with the structural type (monomer or dimer) of the resulting dinitrogen complex. The electronic properties of each titanium sandwich complex were assessed by infrared spectroscopy of the dicarbonyl derivatives and by the oxidation potentials of the corresponding ferrocenes, (η 5 -C 5Me 4R) 2Fe. From these data, the thermodynamic preferences for N 2 coordination have been established and they increase with smaller, electropositive substituents.
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry