Publications in Scientific Journals:
C. Maurer, E. Pittenauer, Van An Du, G. Allmaier, U. Schubert:
"Cyclic bis(b-diketonate)- and bis(b-ketoesterate)-bridged titanium and zirconium alkoxide derivatives";
Dalton Transactions,
41
(2012),
8;
2346
- 2353.
English abstract:
Reaction of Ti(OiPr)4 with various bis(β-diketones) and bis(β-ketoesters) (LH2) results in the formation of dimeric complexes [Ti(OiPr)2L]2, where each metal centre is coordinated by two terminal OiPr ligands and two bridging β-diketonate or β-ketoesterate groups (L). Macrocycles containing two M(OiPr)2 moieties are thus formed. Reaction of Zr(OiPr)4 with the same bis(β-diketones) and bis(β-ketoesters) results in different compounds, depending on the organic spacer connecting the two functional groups. With shorter spacers, the compounds [ZrL(OiPr)2]2.2iPrOH are obtained, with the same structures as the corresponding titanium complexes. With longer spacers, however, complexes with a higher degree of substitution are formed, such as (ZrL2)2 and Zr2L3(OiPr)2.2iPrOH. The molecular weight and structure of all compounds was elucidated by ESI-MS. MS/MS of the corresponding [M+Na]+ precursor ions confirmed the proposed structures based on structure-specific product ions. Solution NMR experiments and DFT calculations additionally supported the proposed structures.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1039/C1DT11780G
Created from the Publication Database of the Vienna University of Technology.