Interaction of Carbon Dioxide with [IrH₂{(^tBu₂)PCH₂CH₂CHCH₂CH₂P(^tBu₂)}]

Abstract

The pincer ligand dihydride complex [IrH 2 {( t Bu 2 )PCH 2 CH 2 CHCH 2 CH 2 P( t Bu 2 )}] interacts with carbon dioxide to give an isolable bicarbonate [IrH(κ 2 -O 2 COH)}{( t Bu 2 )PCH 2 CH 2 CHCH 2 CH 2 P( t Bu 2 )}] derivative and a metal hydride carbonyl compound. An intermediate metallo-formate complex can be detected by NMR spectroscopy. The reaction described is a reverse water gas shift process, CO 2 + H 2 h CO + H 2 O.

Aspects of carbon dioxide utilization

“…Therefore, it is required to find highly reactive metal catalysts. The investigations of the reaction between carbon dioxide and metal compounds, as transition elements, e.g., Ni [5][6][7][8][9], Pd [10,11], Pt [22], Co [12,55], Rh [13,14,22,34], Ir [15][16][17][18], Fe [19][20][21]34,53], Ru [22][23][24][25][26]34,53], Mn [27][28][29], Re [27,[30][31][32][33][34], Cr [35], Mo [35][36][37][38][39], W [35,[38][39][40][41], V …”

Reactions of Tin(II) Hydride Species with Unsaturated Molecules

“…Reactions of metal hydrides with carbon dioxide to generate metal formate species are well known for transition metal hydrides and alkali metal hydrides. [8] However, for group 14 metal hydrides there are only a few reports on the hydrogenation of carbon dioxide using silicon(IV) hydride [9] or tin(IV) hydride. [10] The reaction of carbon dioxide and silicon(IV) hydride requires a transition metal catalyst.…”

“…Hydrogen atoms are omitted for clarity reasons. Selected bond lengths [] and angles [8]: Sn1-O1 2.0414 (15), Sn1-N2 2.2420 (16), Sn1-N3 2.2632 (18); N2-Sn1-O1 99.99 (6), N2-Sn1-N3 82. 10(6).…”

“…Hydrogen atoms are omitted for clarity reasons. Selected bond lengths [] and angles[8]: Sn1-O1 2.0253…”

Pincer‐Type Iridium Complexes for Organic Transformations

“…The stoichiometric activation of CO 2 has been achieved with the iridium -PCP complex 29 comprising an alkyl rather than an aryl skeleton (Scheme 12.12 ) [32] . The addition of CO 2 to the dihydride complex results in C : O insertion into the iridiumhydride bond, and affords the formate complex 30 .…”