Distinct modes of Si-H binding to Rh in complexes of a phosphine-diarylamido-silane (SiNP) pincer ligand

Syntheses of Rh complexes of the phosphine-amido-silane SiNP ligand are reported. The reaction of the parent (SiNP)H ligand (4) with 0.5 equiv. [(COE)RhCl](2) (COE = cis-cyclooctene) in the presence of NaN (SiME3)(2) resulted in the formation of (SiNP)Rh(COE) (5). Compound 5 was converted to a series of (SiNP) Rh(P(OR)(3)) complexes 6-10 (R = Ph,Pr- i, Bu-n, Et, or Me) by treatment with the corresponding phosphite. NMR and XRD structural data, as well as the DFT computational analysis indicate that compounds 5-10 are divided into two structural Types (A and B), differing in the nature of the interaction of the Si-H bond of the SiNP ligand with Rh.

Automated summary

Syntheses of Rh complexes of the phosphine-amido-silane SiNP ligand are described. Different complexes can be obtained through various reactions and treatment.