title: H(C)Ag: a triple resonance NMR experiment for (109) Ag detection in labile silver-carbene complexes.
abstract: In silver complexes, indirect detection of (109) Ag resonances via (1) H,(109) Ag-HMQC frequently suffers from small or absent JHAg couplings or rapid ligand dissociation. In these cases, it would be favourable to employ H(X)Ag triple resonance spectroscopy that uses the large one-bond JXAg coupling (where the donor atom of the ligand X is the relay nucleus). We have applied an HMQC-based version of the H(C)Ag experiment to a labile silver-NHC complex (NHC=N-heterocyclic carbene) at natural (13) C isotopic abundance and variable temperature. In agreement with simulations, H(C)Ag detection became superior to (1) H,(109) Ag-HMQC detection above -20 °C.
authors: Georg-August-Universität, Intitut für Anorganische Chemie, Tammannstrasse 4, Göttingen, 37077, Germany.
authors: Sebastian
authors: S
authors: Weske
authors: Yingjia
authors: Y
authors: Li
authors: Sara
authors: S
authors: Wiegmann
authors: Michael
authors: M
authors: John
mesh_terms: D006571:Heterocyclic Compounds / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D007554:Isotopes / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D008697:Methane / Q000031:analogs & derivatives* / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D012015:Reference Standards; D012834:Silver / Q000032:analysis*; D013696:Temperature
chemical_list: D006571:Heterocyclic Compounds; D007554:Isotopes; D009942:Organometallic Compounds; C030011:carbene; D012834:Silver; D006859:Hydrogen; D008697:Methane
keywords: 109Ag NMR; HMQC; N-heterocyclic carbene; exchange broadening; triple resonance