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- Title
New Rhodium Complexes Coordinated by Bidentate Imine Ligands with Benzothiazolyl Functionalities.
- Authors
Julius, Gerrit R.; Cronje, Stephanie; Neveling, Arno; Esterhuysen, Catharine; Raubenheimer, Helgard G.
- Abstract
The pseudo-square-planar complexes [Rh(cod)(Hbbtm)]BF4 ( 3), [Rh(bbte)(cod)]BF4 ( 4), [Rh(CO)2(Hbbtm)]BF4 ( 5), [Rh(bbte)(CO)2]BF4 ( 6), [Rh(bbtm)(cod)] ( 7) and [Rh(bbtm)(CO)2] ( 8) (Hbbtm=bis(benzothiazol-2-yl)methane=2,2′-methylenebis[benzothiazole], bbte=bis(benzothiazol-2-yl)ethane=2,2′-(ethane-1,2-diyl)bis[benzothiazole], and cod=cycloocta-1,5-diene) were synthesized and characterized. Diastereotopic protons were observed for the protons at the bridge in the 1H-NMR of 3 and 5. Twisting of the ethane-1,2-diyl bridge in 4 and 6 effects chemical equivalence of the CH2 groups in solution. Unusually large downfield shifts occur on coordination of the deprotonated ligand Hbbtm as the negative charge is delocalized in 7 and 8. The NMR signals of the cod ligand in 4 could be differentiated. The X-ray crystal structures of 3, 4, and 6 are reported.
- Publication
Helvetica Chimica Acta, 2002, Vol 85, Issue 11, p3737
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/1522-2675(200211)85:11<3737::AID-HLCA3737>3.0.CO;2-8