Fig. 3 | Nature Communications

Fig. 3

From: Fine-tuning the efficiency of para-hydrogen-induced hyperpolarization by rational N-heterocyclic carbene design

Fig. 3

Analysis of NHC ligands. a Tolman Electronic Parameter (TEP) of the NHC ligand, grouped according to change in the ortho, meta, para and imidazole substituent. b Relationship between Ir-C1 (where C1 is the carbene centre) bond length and TEP in the corresponding [IrCl(COD)(NHC)]. c Buried volume (%Vbur) value for these catalysts. d Rate constants for dissociation of Aequ (s−1) in [Ir(H)2(NHC)(A)3]Cl (catalysts 2, 6, 7 and 22 are omitted due to no active SABRE catalyst formation on exposure to H2)

Back to article page