Syntheses, structures and spectroscopic properties of a novel series of metalmetal bonded complexes Ru(E)(E′)(CO)2(iPrDAB): (E Br, E′ Mn(CO)5; E SnPh3, E′ Mn(CO)5, Re(CO)5, CO(CO)4; E Me, E′ Re(CO)5; E E′ Mn(CO)5, Re(CO)5; iPrDAB N,N′-diisopropyl-1,4-diaza-1,3-butadiene)
| Autor: | Anthony L. Spek, Nora Veldman, Kees Goubitz, Derk J. Stufkens, Maxim P. Aarnts, Jan Fraanje, Ad Oskam |
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| Rok vydání: | 1997 |
| Předmět: |
Absorption spectroscopy
Stereochemistry Organic Chemistry Imine chemistry.chemical_element Rhenium Biochemistry Ruthenium Inorganic Chemistry Crystallography chemistry.chemical_compound chemistry Octahedral molecular geometry Materials Chemistry Proton NMR Physical and Theoretical Chemistry Single crystal Diimine |
| Zdroj: | Journal of Organometallic Chemistry. 531:191-205 |
| ISSN: | 0022-328X |
| DOI: | 10.1016/s0022-328x(96)06726-5 |
| Popis: | This article describes the syntheses, structures and spectroscopic (IR, Raman, NMR, visible absorption) properties of novel metalmetal bonded complexes of the type trans,cis-Ru(E)(E′)(CO)2(iPrDAB) in which E Br, Me, SnPh3, Mn(CO)5 or Re(CO)5 and E′ Mn(CO)5, Re(CO)5 or Co(CO)4 (depending on E). The structures of Ru(SnPh3)(Mn(CO)5)(CO)2(iPrDAB) Ru(SnPh3)(Co(CO)4)(CO)2(iPrDAB) and Ru(Re(CO)5)2(CO)2(iPrDAB) were determined by single crystal X-ray diffraction. The complexes have a distorted octahedral geometry with E and E′ in axial positions. The structure of Ru(SnPh3)(Co(CO)4)(CO)2(iPrDAB) is noteworthy, since one of the carbonyl ligands of the Co(CO)4 group forms a semi-bridge with Ru. The IR and Raman spectra in the ν(CO) and νs(CN) wavenumber region are assigned. The absorption spectra show one or two charge-transfer bands in the visible region, their position and number depending on E and E′. The SnPh3-complexes show in the 1H NMR spectra a large 4 J( 117 119 Sn,H) coupling constant for the imine protons of their iPrDAB ligands, which points to a strong delocalisation of charge within these complexes. |
| Databáze: | OpenAIRE |
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