| Popis: |
New formate ( 1 – 3 ; 4b , 6 and 7 ), acetate ( 8 , 9) and trifluoroacetate ( 12 , 13 and 15 ) complexes have been synthesized and characterized by elemental analysis and by IR and 1 H and 13 C NMR spectroscopies. New data or new synthetic procedures are provided for several known complexes ( 4a , 5 , 19 , 11 and 14 ). X-ray structural data for cis -Ru(bpy) 2 (CO)(OCHO)(PO 2 F 2 ) ( 4b ) clearly identify the η 1 -bound formate ligand bound to an octahedral ruthenium center and the data for fac -Re(CO) 3 (PPh 3 (OCOMe) ( 9 ) show an η 2 -bound acetate ligand bound to an octahedral rhenium center. Infrared spectral data for four types of formate complexes, three bonding types of acetates and the two known types of trifluoroacetate ligands are discussed. Comparisons of the v OCO bands for the carboxylate ligands in all of the complexes show that these bands are useful in identifying the bonding type of each carboxylate ligand. |
Full Text from ScienceDirect