Year: 2024
Type: article
Abstract: The structures and magnetic properties of four paramagnetic bis(carbene)niobium and a diamagnetic monocarbene complex are described. Crystallographic studies show solvated crystals of NbCl4(IMes)2 (1 ⋅ C7H7), NbCl3(IMes)2 (2 ⋅ Et2O and 2 ⋅ C5H12), and NbOCl2(IMes)2 (3 ⋅ Et2O) adopt distorted structures consistent with second‐order Jahn‐Teller carbene‐halide interactions. Magnetic studies indicate 1–3 display appreciable temperature‐independent paramagnetism contributions to their S=1/2, 1, and 1/2 spin ground states, respectively. Slow magnetization relaxation dynamics are seen below ca. 6 and 50 K, which are ascribed as arising from Raman and direct/Raman pathways for 1 and 3, respectively.
Institution: University of Missouri–St. Louis
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405326201