Phosphines with N-Heterocyclic Boryl-Substituents : Ligands for Coordination Chemistry and Catalysis

Show full item record



Permalink

http://hdl.handle.net/10138/324823

Citation

Kaaz , M , Locke , R J C , Merz , L , Benedikter , M , Koenig , S , Bender , J , Schlindwein , S H , Nieger , M & Gudat , D 2019 , ' Phosphines with N-Heterocyclic Boryl-Substituents : Ligands for Coordination Chemistry and Catalysis ' , European Journal of Inorganic Chemistry , no. 11-12 , pp. 1586-1593 . https://doi.org/10.1002/ejic.201801081

Title: Phosphines with N-Heterocyclic Boryl-Substituents : Ligands for Coordination Chemistry and Catalysis
Author: Kaaz, Manuel; Locke, Ralf J. C.; Merz, Luisa; Benedikter, Mathis; Koenig, Simon; Bender, Johannes; Schlindwein, Simon H.; Nieger, Martin; Gudat, Dietrich
Contributor: University of Helsinki, Department of Chemistry
Date: 2019-03-31
Language: eng
Number of pages: 8
Belongs to series: European Journal of Inorganic Chemistry
ISSN: 1434-1948
URI: http://hdl.handle.net/10138/324823
Abstract: Boryl-substituted phosphines NHB-P(R)Ph (R = H, Ph, NHB = N-heterocyclic boryl substituent) react with Fe-2(CO)(9) to give isolable Fe(CO)(4) complexes, two of which were characterized by single-crystal XRD studies. The electronic and steric properties for a series of the boryl phosphines were further assessed by evaluation of TEPs for in-situ formed complexes [RhCl(NHB-(PRR2)-R-1)(CO)(2)] (R-1, R-2 = H, Ph, Me, NMe2), and calculations of buried volumes for Fe(CO)(4) complexes. The results imply that the NHB-phosphines exhibit due to their conformational flexibility some variability in their steric bulk, and that some specimens may exhibit similar electron releasing power and steric demand as tBu(3)P. Studies of the amination of bromobenzene with 2,6-diisopropylaniline confirmed that these properties can be exploited to promote Pd-catalyzed C-N cross coupling reactions, and that formal replacement of a phenyl by a NHB substituent in the auxiliary phosphine has a beneficial effect on catalyst performance.
Subject: Phosphane ligands
Ligand effects
Cross-coupling
Palladium
Boranes
MICROWAVE-ASSISTED AMINATION
CROSS-COUPLING REACTIONS
ELECTRON-RICH
ARYL HALIDES
C-N
ORGANOMETALLIC CHEMISTRY
PHOSPHORUS LIGANDS
ANALOGS
BINDING
116 Chemical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
777_main_text_R1.pdf 1.257Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record