Rhodium-Catalysed Carbonylation of Methanol Using a New Multifunctional Ligand − Isolation and Structural Characterisation of the Macrocycle [Rh2I6(CO)2(C6H4N3CH2CO2C4H2SCO2CH2C6H4N3)]2

Abstract

The new multifunctional ligand thiophene-2,5-bis(carboxylatomethylenebenzotriazole) (1) reacts with [RhCl(CO) 2 ] 2 to give the rhodium complex [RhCl(CO)(1)] 2 (2), which was found to catalyse efficiently the iodide-mediated carbonyl- [a]

Electrochemical, spectroscopic, magnetic and structural studies of complexes bearing ferrocenyl ligands of N-(3-hydroxypicolinoyl)picolinamide

“…1) was readily prepared by reacting 2-picolinic acid with 3-hydroxypicolinamide using standard coupling methods. 43 The formation of Hbpca-OH was unambiguously confirmed by 1 H-NMR with the presence of both imide and hydroxyl protons at 13.07 and 11.35 ppm, respectively. Hbpca-OH presents a great advantage of having a free hydroxyl function available for further functionalisation which allows an easy access to a myriad of new ligands with different properties.…”

Electrochemical, spectroscopic, magnetic and structural studies of complexes bearing ferrocenyl ligands of N-(3-hydroxypicolinoyl)picolinamide

“…1) was readily prepared by reacting 2-picolinic acid with 3-hydroxypicolinamide using standard coupling methods. 43 The formation of Hbpca-OH was unambiguously confirmed by 1 H-NMR with the presence of both imide and hydroxyl protons at 13.07 and 11.35 ppm, respectively. Hbpca-OH presents a great advantage of having a free hydroxyl function available for further functionalisation which allows an easy access to a myriad of new ligands with different properties.…”

1,2,3-Triazoles

“…The bond lengths for each of the Rh 2 I 6 units (2.605–2.692 Å) are typical for that type of structures. In contrast to Rh( i ) macrocycle 71 , Rh( iii ) complex 72 does not catalyze the carbonylation of methanol <2001EJI3005> . …”

Homogeneous Catalysis for the Conversion of CO 2 , CO, CH 3 OH, and CH 4 to C 2+ Chemicals via C–C Bond Formation

“…In 2001, Suss-Fink reported that macrocyclic dinuclear Rh complexes catalyze methanol carbonylation with a TON of 700, almost double that of [RhCl(CO) 2 ] 2 . 115 Shortly after that work, the same group demonstrated that Rh (14.7) or Ir complexes with diphosphine ligands composed of ethylene glycol and amino alcohol spacers that force trans coordination on the metal center are efficient catalysts for C−C coupling between CO and methanol. 116 The authors proposed that mononuclear complexes are the active catalysts and that any binuclear complexes act as reservoirs for the mononuclear species.…”

Electrochemical, spectroscopic, magnetic and structural studies of complexes bearing ferrocenyl ligands of N-(3-hydroxypicolinoyl)picolinamide

“…1) was readily prepared by reacting 2-picolinic acid with 3-hydroxypicolinamide using standard coupling methods. 43 The formation of Hbpca-OH was unambiguously confirmed by 1 H-NMR with the presence of both imide and hydroxyl protons at 13.07 and 11.35 ppm, respectively. Hbpca-OH presents a great advantage of having a free hydroxyl function available for further functionalisation which allows an easy access to a myriad of new ligands with different properties.…”

1,2,3-Triazoles

“…The bond lengths for each of the Rh 2 I 6 units (2.605–2.692 Å) are typical for that type of structures. In contrast to Rh( i ) macrocycle 71 , Rh( iii ) complex 72 does not catalyze the carbonylation of methanol <2001EJI3005> . …”

Homogeneous Catalysis for the Conversion of CO 2 , CO, CH 3 OH, and CH 4 to C 2+ Chemicals via C–C Bond Formation

“…In 2001, Suss-Fink reported that macrocyclic dinuclear Rh complexes catalyze methanol carbonylation with a TON of 700, almost double that of [RhCl(CO) 2 ] 2 . 115 Shortly after that work, the same group demonstrated that Rh (14.7) or Ir complexes with diphosphine ligands composed of ethylene glycol and amino alcohol spacers that force trans coordination on the metal center are efficient catalysts for C−C coupling between CO and methanol. 116 The authors proposed that mononuclear complexes are the active catalysts and that any binuclear complexes act as reservoirs for the mononuclear species.…”

Electrochemical, spectroscopic, magnetic and structural studies of complexes bearing ferrocenyl ligands of N-(3-hydroxypicolinoyl)picolinamide

“…1) was readily prepared by reacting 2-picolinic acid with 3-hydroxypicolinamide using standard coupling methods. 43 The formation of Hbpca-OH was unambiguously confirmed by 1 H-NMR with the presence of both imide and hydroxyl protons at 13.07 and 11.35 ppm, respectively. Hbpca-OH presents a great advantage of having a free hydroxyl function available for further functionalisation which allows an easy access to a myriad of new ligands with different properties.…”

1,2,3-Triazoles

“…The bond lengths for each of the Rh 2 I 6 units (2.605–2.692 Å) are typical for that type of structures. In contrast to Rh( i ) macrocycle 71 , Rh( iii ) complex 72 does not catalyze the carbonylation of methanol <2001EJI3005> . …”

Homogeneous Catalysis for the Conversion of CO 2 , CO, CH 3 OH, and CH 4 to C 2+ Chemicals via C–C Bond Formation

“…In 2001, Suss-Fink reported that macrocyclic dinuclear Rh complexes catalyze methanol carbonylation with a TON of 700, almost double that of [RhCl(CO) 2 ] 2 . 115 Shortly after that work, the same group demonstrated that Rh (14.7) or Ir complexes with diphosphine ligands composed of ethylene glycol and amino alcohol spacers that force trans coordination on the metal center are efficient catalysts for C−C coupling between CO and methanol. 116 The authors proposed that mononuclear complexes are the active catalysts and that any binuclear complexes act as reservoirs for the mononuclear species.…”