An iridium–pyridylpyrrolide complex exhibiting reversible binding of H2

Abstract

The synthesis and characterization of a series of iridium(I) and iridium(III) complexes supported by a 3,5-bis(trifluoromethyl)-2-(2'-pyridyl)pyrrole (L(-)) ligand are reported. Compound [Ir(L)(COD)] (COD = 1,5-cyclooctadiene) demonstrates reversible binding of hydrogen to form a dihydride complex [Ir(L)(H)(2)(COD)] with no hydrogenation of COD.

Investigating pyridazine and phthalazine exchange in a series of iridium complexes in order to define their role in the catalytic transfer of magnetisation from para-hydrogen

“…A related iridium pyridylpyrrolide COD complex has been shown by Searles et al to reversibly bind hydrogen in a similar way. 62 …”

Probing the Steric and Electronic Characteristics of a New Bis-Pyrrolide Pincer Ligand

“…1 H NMR (400 MHz, DMSO-d 6 ): δ 3.80 (s, 4H), 7.26 (d, J = 8.0 Hz, 2H), 7.70 (t, J = 7.8 Hz, 1H). 13 C NMR (101 MHz, DMSO-d 6 ): δ 52.57, 123.68, 141.92, 167. 16.…”

Mechanistic insight into novel sulfoxide containing SABRE polarisation transfer catalysts

“…9,10 It typically occurs via a concerted mechanism wherein the newly introduced groups are located in a cis relationship. 11 Activation of more polar molecules such as CH 3 I is, however, more often complex and this difference is revealed in the trans relationship between the two newly introduced groups. 9 Orbital overlap effects during H 2 addition, as revealed through density function theory (DFT), are also complex with repulsive interactions between filled orbitals on the metal and H 2 yielding a barrier to the oxidative addition process that must be overcome.…”