Synthesis and Coordination Behavior of a New Hybrid Bidentate Ligand with Phosphine and Silylene Donors
2020-12-14 | journal article. A publication with affiliation to the University of Göttingen.
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Synthesis and Coordination Behavior of a New Hybrid Bidentate Ligand with Phosphine and Silylene Donors
Nazish, M.; Siddiqui, M. M.; Kumar Sarkar, S.; Münch, A.; Legendre, C. M.; Herbst‐Irmer, R. & Stalke, D. et al. (2020)
Chemistry – A European Journal, 27(5) pp. 1744-1752. DOI: https://doi.org/10.1002/chem.202003513
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- Nazish, Mohd; Siddiqui, Mujahuddin M.; Kumar Sarkar, Samir; Münch, Annika; Legendre, Christina M.; Herbst‐Irmer, Regine; Stalke, Dietmar; Roesky, Herbert W.
- Abstract
- Abstract This work describes the synthesis and coordination behavior of a new mixed‐donor ligand PhC(NtBu)2SiC6H4PPh2 (1) containing both silylene and phosphine donor sites. Ligand 1 was synthesized from a reaction of ortho‐lithiated diphenylphosphinobenzene (LiC6H4PPh2) with chlorosilylene (PhC(NtBu)2SiCl). Treatment of 1 with Se and GeCl2 resulted in SiIV compounds 2 and 3 by selective oxidation of the silylene donor. This strong σ‐donor ligand induces dissociation of CuCl and PhBCl2 leading to formation of ionic complexes 4 and 5 respectively. The reaction of 1 with ZnCl2 and AlCl3 resulted in the formation of chelate complexes 5 and 7, respectively, while treatment with EtAlCl2 and GaCl3 forms monodentate complexes 8 and 9. X‐ray analysis of 4 showed that the copper is in the spiro center of the two five‐membered rings. Moreover, the copper(I)chloride has not been oxidized but dissociates to Cu+ and [CuCl2]−. All the compounds are well characterized by mass spectrometry, elemental analysis, NMR spectroscopy, and single‐crystal X‐ray diffraction studies.
A ligand with different Lewis base donor sites of phosphorus(III) and silicon(II). The ligands are arranged in 1,2‐position at the benzene ring to generate mainly five‐membered ring compounds containing a metal atom. The exceptions of the compounds show clearly that the metal is preferentially coordinated to the silylene atom rather than to the phosphane site of the ligand. image - Issue Date
- 14-December-2020
- Journal
- Chemistry – A European Journal
- Language
- English
- Sponsor
- DFG http://dx.doi.org/10.13039/501100001659