195Pt NMR determination of the enantiomeric purity and absolute configuration of trisubstituted allenes by using [PtCl3(C2H4)]-[(S,S)-(1-NpMeCH)2NH2]+ as CDA.
[figure: see text] The ionic CDA [PtCl3(C2H4)]-[(S,S)-(1-NpMeCH)2NH2]+ produces, on exchange of its coordinated ethylene by chiral trisubstituted allenes, diastereoisomeric mixtures originating distinct 195Pt NMR resonances for the complexed enantiomers, thus allowing the determination of the enantiomeric purity. A reproducible correlation between relative positions of platinum signals due to the complexed enantiomers and their absolute configuration has been found.
Uccello-Barretta
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Centro di Studio del CNR per le Macromolecole Stereordinate ed Otticamente Attive, Dipartimento di Chimica e Chimica Industriale, via Risorgimento 35, 56126 Pisa, Italy.
Bernardini
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Balzano
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Caporusso
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Salvadori
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