NHC-phosphane rhodium complexes and their reaction with oxygen

Ahmida, Aziza; Elmagbari, Fatin M.; Egold, Hans; Flörke, Ülrich; Henkel, Gerald

doi:10.1016/j.poly.2020.114472

Cited by 2 publications

(1 citation statement)

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“…Although the solid state structure of 6 could not be determined by X-ray diffraction methods, a trigonal bipyramidal structure with a trans disposition of the NHC ligands is assumed in an analogy to the related coumarin-functionalized bis-NHC complexes RhCl(BzICou R ) 2 and RhCl(ICou R ) 2 described previously [ 53 ]. Interestingly, the X-ray single-crystal analysis of the mixed bis-NHC compound 7 revealed a cis disposition for the IPr and coumarin-BzI carbenes, an uncommon feature in square planar rhodium(I) complexes when a trans configuration is feasible [ 67 , 68 ] ( Figure 3 ).…”

Section: Resultsmentioning

confidence: 99%

Preparation of Mixed Bis-N-Heterocyclic Carbene Rhodium(I) Complexes

Azpíroz

Karataş²,

Passarelli³

et al. 2022

Molecules

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A series of mixed bis-NHC rhodium(I) complexes of type RhCl(η2-olefin)(NHC)(NHC’) have been synthesized by a stepwise reaction of [Rh(μ-Cl)(η2-olefin)2]2 with two different NHCs (NHC = N-heterocyclic carbene), in which the steric hindrance of both NHC ligands and the η2-olefin is critical. Similarly, new mixed coumarin-functionalized bis-NHC rhodium complexes have been prepared by a reaction of mono NHC complexes of type RhCl(NHC-coumarin)(η2,η2-cod) with the corresponding azolium salt in the presence of an external base. Both synthetic procedures proceed selectively and allow the preparation of mixed bis-NHC rhodium complexes in good yields.

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Section: Resultsmentioning

confidence: 99%