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Chalcogen-Transfer Rearrangement: Exploring Inter- versus Intramolecular P-P Bond Activation.

ABSTRACT: tert-Butyl-substituted diphospha[2]ferrocenophane has been used as a stereochemically confined diphosphane to explore the addition of O, S, Se and Te. Although the diphosphanylchalcogane has been obtained for tellurium, all other chalcogens give diphosphane monochalcogenides. The latter transform via chalcogen-transfer rearrangement to the corresponding diphosphanylchalcoganes upon heating. The kinetics of this rearrangement has been followed with NMR spectroscopy supported by DFT calculations. Intermediates during rearrangement point to a disproportionation/synproportionation mechanism for the S and Se derivatives. Cyclic voltammetry together with DFT studies indicate ferrocene-centred oxidation for most of the compounds presented.

SUBMITTER: Franz R

PROVIDER: S-EPMC7839705 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature

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Chalcogen-Transfer Rearrangement: Exploring Inter- versus Intramolecular P-P Bond Activation.

Franz Roman R Nasemann Sina S Bruhn Clemens C Kelemen Zsolt Z Pietschnig Rudolf R

Chemistry (Weinheim an der Bergstrasse, Germany) 20201109 2

tert-Butyl-substituted diphospha[2]ferrocenophane has been used as a stereochemically confined diphosphane to explore the addition of O, S, Se and Te. Although the diphosphanylchalcogane has been obtained for tellurium, all other chalcogens give diphosphane monochalcogenides. The latter transform via chalcogen-transfer rearrangement to the corresponding diphosphanylchalcoganes upon heating. The kinetics of this rearrangement has been followed with NMR spectroscopy supported by DFT calculations. ...[more]

PMID: 32678960

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