Benzimidazolin-2-iminato Hafnium Complexes: Synthesis, Characterization, and Catalytic Addition of Alcohols to Carbodiimides

Maxim Khononov, Heng Liu, Natalia Fridman, Matthias Tamm, Moris S. Eisen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A series of asymmetric imidazolin-2-iminato and benzimidazolin-2-iminato hafnium(IV) complexes were synthesized and fully characterized including single-crystal X-ray diffraction. The asymmetric imidazolin-2-iminato hafnium complex exhibits a shorter Hf-N bond length as compared with the corresponding benzimidazolin-2-iminato hafnium complex. These complexes were successfully utilized as catalysts for the addition of alcohols to carbodiimides. The synthesis of several active intermediates and kinetics, thermodynamics, and stoichiometric reaction studies allowed us to propose a mechanism for the reaction. The X-ray crystal structure of the monomeric Hf(OtBu)4 is presented.

Original languageEnglish
Pages (from-to)3021-3033
Number of pages13
JournalOrganometallics
Volume39
Issue number16
DOIs
StatePublished - 24 Aug 2020
Externally publishedYes

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