Tris(tetramethylguanidinyl)phosphine: The Simplest Non‐ionic Phosphorus Superbase and Strongly Donating Phosphine Ligand. Issue 3 (9th December 2021)

• Record Type: Journal Article
• Authors: Buß, Florenz; Röthel, Maike B.; Werra, Janina A.; Rotering, Philipp; Wilm, Lukas F. B.; Daniliuc, Constantin G.; Löwe, Pawel; Dielmann, Fabian
• Is Part Of: Chemistry. Volume 28:Issue 3(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-12-09
• Subjects: carbon dioxide -- phosphine ligands -- phosphorus -- strong donors -- superbases; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202104021
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: We report the synthesis and properties of the much sought‐after tris(1, 1, 3, 3‐tetramethylguanidinyl) phosphine P(tmg)3, a crystalline, superbasic phosphine accessible through a short and scalable procedure from the cheap and commercially available bulk chemicals 1, 1, 3, 3‐tetramethylguanidine, tris(dimethylamino)‐phosphine and phosphorus trichloride. The new phosphine exhibits exceptional electron donor properties and readily forms transition metal complexes with gold(I), palladium(II) and rhodium(I) precursors. The formation of zwitterionic Lewis base adducts with carbon dioxide and sulfur dioxide was explored. In addition, the complete series of phosphine chalcogenides was prepared from the reaction of P(tmg)3 with N2 O and the elemental chalcogens. Abstract : The crystalline phosphorus superbase tris(1, 1, 3, 3‐tetramethylguanidinyl)phosphine is accessible through an easy and scalable procedure starting from cheap and commercially available bulk chemicals. The properties of the strongly electron‐donating phosphine in coordination chemistry and the reactivity with small molecules (CO2, SO2, N2 O and elemental chalcogens) were studied.