Rhodium(I) complexes with unsymmetric aliphatic diamines. Crystal structure of [Rh(C8H12)(C7N2H16)][RhCl2(C8H12)] and [Rh(C8H12)(C7N2H16)]ClO4
摘要:
Reactions of [Rh(COD)Cl]2 with unsymmetric aliphatic diamines (LL') have been studied. The 1:1 ligand:dimer reactions yield ionic products [Rh(C8H12)(LL')][RhCl2(C8H12)] that in solution are in equilibrium with the respective binuclear compounds {[RhCl2(C8H12)]2(mu-LL')}. The X-ray structure of [Rh(C8H12)(C7N2H16)][RhCl2(C8H12)] is presented. When the reactions are performed in media saturated with CO, carbonylated ion-pair complexes are obtained. The 2:1 ligand:dimer reactions afford neutral tetracoordinated [Rh(COD)(LL')Cl] compounds bonded through the primary amino group, and show rapid interchange of olefinic protons at room temperature. The synthesis and properties of cationic complexes of general formulae [Rh(COD)(LL')]ClO4 and [Rh(CO)(PPh3)(LL')]ClO4 are also discussed. Cyclooctadiene compounds show association processes in acetone solution, though they are monomeric in the solid state. The X-ray structure of [Rh(C8H12)(C7N2H16)]ClO4 indicates the existence of hydrogen bonding between the oxygens in the perchlorate anion and the primary amino group in the cation.
Rhodium(I) complexes with unsymmetric aliphatic diamines. Crystal structure of [Rh(C8H12)(C7N2H16)][RhCl2(C8H12)] and [Rh(C8H12)(C7N2H16)]ClO4
摘要:
Reactions of [Rh(COD)Cl]2 with unsymmetric aliphatic diamines (LL') have been studied. The 1:1 ligand:dimer reactions yield ionic products [Rh(C8H12)(LL')][RhCl2(C8H12)] that in solution are in equilibrium with the respective binuclear compounds {[RhCl2(C8H12)]2(mu-LL')}. The X-ray structure of [Rh(C8H12)(C7N2H16)][RhCl2(C8H12)] is presented. When the reactions are performed in media saturated with CO, carbonylated ion-pair complexes are obtained. The 2:1 ligand:dimer reactions afford neutral tetracoordinated [Rh(COD)(LL')Cl] compounds bonded through the primary amino group, and show rapid interchange of olefinic protons at room temperature. The synthesis and properties of cationic complexes of general formulae [Rh(COD)(LL')]ClO4 and [Rh(CO)(PPh3)(LL')]ClO4 are also discussed. Cyclooctadiene compounds show association processes in acetone solution, though they are monomeric in the solid state. The X-ray structure of [Rh(C8H12)(C7N2H16)]ClO4 indicates the existence of hydrogen bonding between the oxygens in the perchlorate anion and the primary amino group in the cation.