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Reduced Arene Complexes of Scandium.


ABSTRACT: Alkali metal naphthalenide or anthracenide reacted with scandium(III) anilides [Sc(X){N(tBu)Xy}2 (thf)] (X=N(tBu)Xy (1); X=Cl (2); Xy=C6 H3 -3,5-Me2 ) to give scandium complexes [M(thf)n ][Sc{N(tBu)Xy}2 (RA)] (M=Li-K; n=1-6; RA=C10 H8 2- (3-Naph-K) and C14 H10 2- (3-Anth-M)) containing a reduced arene ligand. Single-crystal X-ray diffraction revealed the scandium(III) center bonded to the naphthalene dianion in a ?2 :?-coordination mode, whereas the anthracene dianion is symmetrically attached to the scandium(III) center in a ?2 -fashion. All compounds have been characterized by multinuclear, including 45 Sc?NMR spectroscopy. Quantum chemical calculations of these intensely colored arene complexes confirm scandium to be in the oxidation state +3. The intense absorptions observed in the UV/Vis spectra are due to ligand-to-metal charge transfers. Whereas nitriles underwent C-C coupling reaction with the reduced arene ligand, the reaction with one equivalent of [NEt3 H][BPh4 ] led to the mono-protonation of the reduced arene ligand.

SUBMITTER: Ghana P 

PROVIDER: S-EPMC7496515 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Reduced Arene Complexes of Scandium.

Ghana Priyabrata P   Hoffmann Alexander A   Spaniol Thomas P TP   Okuda Jun J  

Chemistry (Weinheim an der Bergstrasse, Germany) 20200713 45


Alkali metal naphthalenide or anthracenide reacted with scandium(III) anilides [Sc(X){N(tBu)Xy}<sub>2</sub> (thf)] (X=N(tBu)Xy (1); X=Cl (2); Xy=C<sub>6</sub> H<sub>3</sub> -3,5-Me<sub>2</sub> ) to give scandium complexes [M(thf)<sub>n</sub> ][Sc{N(tBu)Xy}<sub>2</sub> (RA)] (M=Li-K; n=1-6; RA=C<sub>10</sub> H<sub>8</sub> <sup>2-</sup> (3-Naph-K) and C<sub>14</sub> H<sub>10</sub> <sup>2-</sup> (3-Anth-M)) containing a reduced arene ligand. Single-crystal X-ray diffraction revealed the scandium(II  ...[more]

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