Abstract
The new compounds [Nb{(η-C5H4)X(η-C5H4)}Cl2] (X = CEt2 1a, C(C5H10) 1b, C2Me4 1c), [Nb{(η-C5H3tBu)C2Me4(η-C5H3tBu)}Cl2] 1d, [Nb{(η-C5H4)X(η-C5H4)}(η2-BH4)] (X = CEt2 2a*, C(C5H10) 2b, C2Me4 2c*, SiMe2 2e*), [Nb{(η-C5H3tBu)C2Me4(η-C5H3tBu)}(η2-BH4)] (2d*), [Nb{(η-C5H4)X(η-C5H4)}(η2-BD4)] (X = C2Me4 3c, CMe2 4), and [V{(η-C5H4)C2Me4(η-C5H4)}(η2-BH4)] (5*) have been prepared. The asterisk indicates the crystal structure has been determined. The hydrogen scrambling processes in the tetrahydroborate complexes 2a−e, 3c, 4, 5, and [Nb{(η-C5H4)CMe2(η-C5H4)}(η2-BH4)] have been studied. The free energy barrier ΔG⧧ to bridge-terminal hydrogen exchange is considerably reduced when the bridging unit imposes significant structural changes in the metallocene.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
