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- W2084960178 abstract "Alkenyl substituted 1H-1,2-azaborolyl (Ab) complexes are promising candidates for stereoselective reactions, due to the chirality of the AbM moiety and the intramolecular coordination of the alkenyl group to the metal atom. The synthesis of [1-tert-butyl-2-methy1-3-(4-penten- l -y1)-η 5 -1H-1,2-azaborolyl]-bis(triphenylphosphine)rhodium (3) is achieved by the reaction of AbLi (2) [from AbH (1)] with (Ph 3 P) 3 RhCl. In benzene solution one PPh 3 ligand of 3 is substituted by the C=C group of the pentenyl substituent. Simultaneously the η 5 -coordination of the Ab ring changes to an allylic η 3 -coordination forming 4. Steric reasons seem to be responsible for this intramolecular rearrangement. The shorter 2-propen-1-yl substituent is unable to act in the same way and therefore only forms the stable complex [1-tert-butyl-2-methyl-3-(2-propen- l -yl)-η 5 -1H-1,2-azaborolyl]-bis(triphenylphosphine)rhodium (7). Mass spectrometry, 1 H, 11 B and 31 P NMR data were used to characterize the novel complexes." @default.
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- W2084960178 date "1992-05-01" @default.
- W2084960178 modified "2023-09-26" @default.
- W2084960178 title "Azaborolyl-Komplexe, 27 / Azaborolyl Complexes, 27" @default.
- W2084960178 doi "https://doi.org/10.1515/znb-1992-0505" @default.
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