Reactivity of a β-diketiminate ytterbium(II) hydride with cyclopentadiene derivatives. Issue 11 (28th October 2022)

• Record Type: Journal Article
• Authors: Richardson, Georgia M.; Howarth, Jesse; Evans, Matthew J.; Edwards, Alison J.; Cameron, Scott A.; Anker, Mathew David
• Is Part Of: Journal of coordination chemistry. Volume 75:Issue 11/14(2022)
• Page Start: 1954
• Page End: 1966
• Publication Date: 2022-10-28
• Subjects: Ytterbium(II) hydrides -- cyclopentadienyls -- organoytterbium -- single crystal X-ray diffraction -- single crystal neutron diffraction; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2022.2130277
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: Cyclopentadienyl ligands are ubiquitous in lanthanide chemistry and have been used extensively to stabilize low-valent lanthanide(II) complexes. We now report the reactions of the β-diketiminate ytterbium(II) hydride [(BDI Dipp )Yb(H)]2 (BDI Dipp = HC{C(Me)NDipp}2, Dipp = 2, 6- i Pr2 C6 H3 ) with tetramethylcyclopentadiene, pentamethylcyclopentadiene, indene, and fluorene; to provide ready access to the heteroleptic ytterbium(II) η 5 -C5 R5 cyclopentadienides with extrusion of hydrogen gas. The tetramethylcyclopentadienyl, pentamethylcyclopentadienyl, indenyl, and fluorenyl compounds were characterized by 1 H and 13 C{ 1 H} NMR, elemental analysis, and single crystal X-ray diffraction. These data indicated that each heteroleptic cyclopentadienide exists as a mononuclear species in both solution and the solid state, formulated with retention of the oxidation state on the ytterbium(II) center. Additionally, the pentamethylcyclopentadienyl derivative was characterized by single crystal neutron diffraction, a study that explored the nature of an agostic interaction between a methyl group and the ytterbium(II) center. Graphical Abstract: UF0001