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Inter-ligand intramolecular through-space anisotropic shielding in a series of manganese carbonyl phosphorous compounds.
- Source :
-
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2019 Oct 07; Vol. 48 (39), pp. 14926-14935. - Publication Year :
- 2019
-
Abstract
- Eight novel manganese carbonyl complexes of the type [Mn(bpy-tBu)(CO)3PR3]+ (bpy-tBu = 4,4'-di-tert-butyl-2,2'-bipyridine; R = Cy, nBu, Me, p-tol, Ph, p-F-Ph, OEt, and OMe), have been synthesized and characterized by 1H NMR, FTIR, UV/Vis, HRMS and CV. X-ray crystallographic structures of [Mn(bpy-tBu)(CO)3(PCy3)]+ and [Mn(bpy-tBu)(CO)3(PPh3)]+ were obtained. The short Mn-P bond length allows for close proximity of the bipyridine ligand and the phosphine R groups, resulting in strong anisotropic shielding of certain bipyridine protons by aryl R groups (reordering the bipyridine 1H NMR pattern in the most extreme case). Electrochemical analysis of the compound series reveals that while each is a competent precatalyst for electrochemical carbon dioxide reduction (to carbon monoxide), the lability of the PR3 ligand results in similar catalytic performance amongst the series.
Details
- Language :
- English
- ISSN :
- 1477-9234
- Volume :
- 48
- Issue :
- 39
- Database :
- MEDLINE
- Journal :
- Dalton transactions (Cambridge, England : 2003)
- Publication Type :
- Academic Journal
- Accession number :
- 31559411
- Full Text :
- https://doi.org/10.1039/c9dt03100f