The intensity ratio of the 2 sets of signals present in the 1H NMR spectrum of trans-PdX2(Me2C=N-NMePh)2 changes going from chloro to bromo analogs. Similar changes occur in trans-PdCl2(R1R2C=N-NR3R4)2 varying the bulkiness of R1 (R1 = Me, Et, or iso-Pr), which is cis to the metal atom. All these facts prove the presence in soln. of 2 rotational isomers differing by mutual orientation of coordinated ligands rather than unequivalence of the 2 hydrazones within the same mol. In trans-PdCl2(Me2C=N-NMePh)(Me2C=N-NMe2) the sepn. of the 2 sets of signals relative to the -NMePh hydrazone is similar to that showed by the -NMe2 hydrazone in the sym. trans-PdCl2(Me2C=N-NMe2)2. In an analogous way the sepn. of signals relative to the -NMe2 hydrazone is similar to that showed by the -NMePh one in trans-PdCl2(Me2C=N-NMePh)2. Therefore the splitting is detd. by reciprocal influence of trans ligands in the 2 isomers. Indexing (SCI Finder)

On the dynamic behaviour of trans-dihalide-bishydrazone-palladium(II) complexes / G., Natile; L., Cattalini; Gasparrini, Francesco; Caglioti, Luciano. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - STAMPA. - 101:(1979), pp. 498-499. [10.1021/ja00496a046]

On the dynamic behaviour of trans-dihalide-bishydrazone-palladium(II) complexes

GASPARRINI, Francesco;CAGLIOTI, Luciano
1979

Abstract

The intensity ratio of the 2 sets of signals present in the 1H NMR spectrum of trans-PdX2(Me2C=N-NMePh)2 changes going from chloro to bromo analogs. Similar changes occur in trans-PdCl2(R1R2C=N-NR3R4)2 varying the bulkiness of R1 (R1 = Me, Et, or iso-Pr), which is cis to the metal atom. All these facts prove the presence in soln. of 2 rotational isomers differing by mutual orientation of coordinated ligands rather than unequivalence of the 2 hydrazones within the same mol. In trans-PdCl2(Me2C=N-NMePh)(Me2C=N-NMe2) the sepn. of the 2 sets of signals relative to the -NMePh hydrazone is similar to that showed by the -NMe2 hydrazone in the sym. trans-PdCl2(Me2C=N-NMe2)2. In an analogous way the sepn. of signals relative to the -NMe2 hydrazone is similar to that showed by the -NMePh one in trans-PdCl2(Me2C=N-NMePh)2. Therefore the splitting is detd. by reciprocal influence of trans ligands in the 2 isomers. Indexing (SCI Finder)
1979
01 Pubblicazione su rivista::01a Articolo in rivista
On the dynamic behaviour of trans-dihalide-bishydrazone-palladium(II) complexes / G., Natile; L., Cattalini; Gasparrini, Francesco; Caglioti, Luciano. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - STAMPA. - 101:(1979), pp. 498-499. [10.1021/ja00496a046]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/454235
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