15N NMR Study of Coordinated Amine, Aminocarbyne, and Carboxamido Groups in Triosmium Clusters
Resource
Journal of the Chinese Chemical Society 44 (3): 237-241
Journal
Journal of the Chinese Chemical Society
Journal Volume
44
Journal Issue
3
Pages
237-241
Date Issued
1997
Author(s)
Abstract
Abstract The 15 N NMR spectra of the complexes Os 3 (CO) 10 (μ 2 ‐CONHPr i )(μ 2 ‐CNHR) (1a, R = Pr; 1b, R = CH 2 Ph) and Os 3 (CO) 9 (NH 2 Pr i )(μ 2 ‐CONHPr i )(μ 2 ‐CNHR) (2a, R = Pr; 2b, R = CH 2 Ph) are studied by using the 1 H detected (inverse) 1 H‐ 15 N correlated spectroscopy. The 15 N chemical shifts and the 1 H‐ 15 N coupling constants fall in characteristic regions for each of the coordinated amine, aminocarbyne, and carboxamido ligands and these values are related to their bonding types. The NMR data are discussed in terms of the influence of the paramagnetic term which is the major factor determining the chemical shifts. A comparison is made to understand the 15 N chemical‐shift differences between the coordinated nitrogen‐containing ligands and the corresponding free organic molecules.
SDGs
Type
journal article