The binuclear iridium compound can swap hydrogen atoms in pyridine molecules at specific rates, with the ortho position exchanging fastest.
Scientific Claim
The binuclear iridium complex (Cl)(H)(py)(μ-Cl)(μ-H)(κ-μ-NC5H4)Ir(H)(py)2 facilitates hydrogen isotope exchange in pyridine, with ortho, meta, and para deuteration rates of 4.3 × 10⁻⁵ s⁻¹, 3.85 × 10⁻⁵ s⁻¹, and 3.05 × 10⁻⁵ s⁻¹ at 313 K.
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
The study reports measured rates of deuteration, which is appropriate for describing an association between the complex and its catalytic activity.
More Accurate Statement
“The binuclear iridium complex (Cl)(H)(py)(μ-Cl)(μ-H)(κ-μ-NC5H4)Ir(H)(py)2 is associated with facilitating hydrogen isotope exchange in pyridine, with ortho, meta, and para deuteration rates of 4.3 × 10⁻⁵ s⁻¹, 3.85 × 10⁻⁵ s⁻¹, and 3.05 × 10⁻⁵ s⁻¹ at 313 K.”
Source Excerpt
“When 3 bar of D2 was employed with a pyridine-h5 to 4 ratio of 25:1, the rate of 2H label incorporation proved to be 4.3 × 10–5 s–1 (ortho), 3.85 × 10–5 s–1 (meta), and 3.05 × 10–5 s–1 (para) at 313 K.”
Evidence from Studies
Supporting Evidence (1)
The study reports specific rates of deuterium incorporation at different positions in pyridine when using the binuclear iridium complex. The source excerpt directly states the measured rates for ortho, meta, and para deuteration.