Formation of hydride, formyl, hydroxymethyl, dimetal ketone, and ethylene-bridged species from small-molecule substrate reactions with rhodium complexes of an N{sub 4} nonmacrocylic ligand
- Univ. of Pennsylvania, Philadelphia, PA (United States)
Reactions of the rhodium(II) dimer [(dbpb)-Rh]{sub 2} (1) ((dbpb) H{sub 2} (2) = 4,5-dimethyl-1,2-bis ((4-(1-butylpentyl))pyridine-2-carboxamido)benzene) with H{sub 2}, CO, and CH{sub 2}=CH{sub 2} produce a rhodium(III) hydride, (dbpb)Rh-H (3), dirhodium ketone, (dbpb)Rh-C(O)-Rh(dbpb) (4), and an ethylene-bridged complex, (dbpb)-Rh-CH{sub 2}CH{sub 2}-Rh(dpbp) (5), respectively. The rhodium(III) hydride (3) reacts with CO and H{sub 2}CO to produce formyl, (dbpb)Rh-CHO (6), and hydroxymethyl, (dbpb)-Rh-CH{sub 2}OH (7) complexes. Equilibrium thermodynamic studies for reactions of 1 with hydrogen and ethene and the observed substrate reactions of 1 and 3 indicate that the (dbpb)Rh-H and (dbpb)Rh-C bond dissociation enthalpies are comparable to those for rhodium porphyrin complexes. 12 refs., 3 figs.
- DOE Contract Number:
- FG02-86ER13615
- OSTI ID:
- 420751
- Journal Information:
- Organometallics, Journal Name: Organometallics Journal Issue: 22 Vol. 15; ISSN ORGND7; ISSN 0276-7333
- Country of Publication:
- United States
- Language:
- English
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