The complex formation of [SnMe2]2+ ion with iminodiacetate, oxydiacetate and thiodiacetate ligands has been investigated by potentiometric, calorimetric and multinuclear magnetic resonance measurements in aqueous solution at 25-degrees-C and l = 0.1 mol dm-3 (KNO3). Both the thermodynamic values and NMR parameters revealed the flexibility of the organometallic ion, as regards both the Me-Sn-Me angle and its ability to adopt unusual asymmetric stereochemistries. A new stereochemistry was found for the five-coordinated iminodiacetate complex, the formation of which exhibits three-site kinetics.
The complex formation of [SnMe2]2+ ion with iminodiacetate, oxydiacetate and thiodiacetate ligands has been investigated by potentiometric, calorimetric and multinuclear magnetic resonance measurements in aqueous solution at 25-degrees-C and l = 0.1 mol dm-3 (KNO3). Both the thermodynamic values and NMR parameters revealed the flexibility of the organometallic ion, as regards both the Me-Sn-Me angle and its ability to adopt unusual asymmetric stereochemistries. A new stereochemistry was found for the five-coordinated iminodiacetate complex, the formation of which exhibits three-site kinetics.
THERMODYNAMIC AND MULTINUCLEAR MAGNETIC-RESONANCE STUDY OF DIMETHYLTIN(IV) COMPLEXES WITH TRIDENTATE LIGANDS IN AQUEOUS-SOLUTION
MACCARRONE, Giuseppe;PURRELLO, Roberto;RIZZARELLI, Enrico
1992-01-01
Abstract
The complex formation of [SnMe2]2+ ion with iminodiacetate, oxydiacetate and thiodiacetate ligands has been investigated by potentiometric, calorimetric and multinuclear magnetic resonance measurements in aqueous solution at 25-degrees-C and l = 0.1 mol dm-3 (KNO3). Both the thermodynamic values and NMR parameters revealed the flexibility of the organometallic ion, as regards both the Me-Sn-Me angle and its ability to adopt unusual asymmetric stereochemistries. A new stereochemistry was found for the five-coordinated iminodiacetate complex, the formation of which exhibits three-site kinetics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
