Can a meso-type dinuclear complex be chiral?: dinuclear -diketonato Ru(III) complexesElectronic supplementary information (ESI) available: The results of chromatographic resolution of [Ru(III)(acac)2(S- or R-dabe)Ru(III)(acac)2)] and [Ru(III)(acac)2(tbet)Ru(III)(acac)2)]; mass spectra and 1H NMR of [Ru(acac)2(CH3(CN)2]PF6, dabeH2 and tbetH2; 1H NMR data of the isomers of [Ru(III)(acac)2(S- or R-dabe)Ru(III)(acac)2] and [Ru(III)(acac)2(tbet)Ru(III)(acac)2]; chiral chromatographic resolution of [R
Dinuclear Ru(III) complexes, [Ru(III)(acac) 2 (dabe)Ru(III)(acac) 2 ] (acacH = acetylacetone; dabeH 2 = 1, 2-diacetyl-1,2-dibenzoylethane) and [Ru(III)(acac) 2 (tbet)Ru(III)(acac) 2 ] (tbetH 2 = 1,1,2,2-tetrabenzoylethane) were synthesized by reacting [Ru(acac) 2 (CH 3 CN) 2 ]PF 6 with dabeH 2 and t...
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Sprache: | eng |
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Zusammenfassung: | Dinuclear Ru(III) complexes, [Ru(III)(acac)
2
(dabe)Ru(III)(acac)
2
] (acacH = acetylacetone; dabeH
2
= 1, 2-diacetyl-1,2-dibenzoylethane) and [Ru(III)(acac)
2
(tbet)Ru(III)(acac)
2
] (tbetH
2
= 1,1,2,2-tetrabenzoylethane) were synthesized by reacting [Ru(acac)
2
(CH
3
CN)
2
]PF
6
with dabeH
2
and tbetH
2
respectively, in toluene. The X-ray structural analysis of a meso-type dinuclear Ru(III) complex, [Ru(III)(acac)
2
(dabe)Ru(III)(acac)
2
], showed that the bridging part became chiral due to the orthogonal twisting of two non-symmetrical -diketonato moieties. To confirm this conclusion, the complex was resolved chromatographically to provide a pair of optical antipodes. Such chirality in the bridging part was not generated for [Ru(III)(acac)
2
(tbet)Ru(III)(acac)
2
], because the -diketonato moieties in tbet
2
are symmetrical.
X-ray structural analysis shows that the bridging part of -[Ru(III)(acac)
2
(dabe)Ru(III)(acac)
2
] (dabe = 1,2-diacetyl-1,2-dibenzoylethanato) becomes chiral due to the orthogonal twisting of two non-symmetrical -diketonato moieties. |
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ISSN: | 1477-9226 1477-9234 |
DOI: | 10.1039/c1dt11133g |