Journal article
Formation of Novel ansa -Carborane−Alkoxide Complexes by Carbonylation of (C 5 Me 5 )(η 5 -C 2 B 9 H 11 )TiMe
Organometallics, Vol.17(6), pp.1085-1091
03/16/1998
DOI: 10.1021/om970962n
Abstract
The reaction of Cp*(η5-C2B9H11)TiMe (1, Cp* = C5Me5) with CO (0.5−1 atm) in toluene (−78 to 23 °C) yields a 1:4 mixture of Cp*(η5:η1-8-CHMeO-C2B9H10)Ti (6) and Cp*(η5:η1-4-CHMeO-C2B9H10)Ti (7), in ca. 90% total NMR yield. Complexes 6 and 7 both contain a linked carborane−alkoxide ligand but differ in the site of attachment of the −CHMeO− linker to the carborane cage. The linker is attached at the central boron of the C2B3 donor ring (B8) in 6 and to a lateral boron (B4 or B7) in 7. The anticipated acyl complex, Cp*(η5-C2B9H11)TiC(O)Me (8), was not observed. However, experiments with 13CO show that the −BCHMeO− carbon atoms in 6 and 7 originate from the CO, which implies that 8 is formed first and rearranges to 6 or 7 by net insertion of the acyl carbon into a B−H bond. The molecular structures of 6 and Cp*(η5:η1-4-CHMeO-C2B9H10)Ti(NCMe) (9) have been determined by X-ray crystallography.
Details
- Title: Subtitle
- Formation of Novel ansa -Carborane−Alkoxide Complexes by Carbonylation of (C 5 Me 5 )(η 5 -C 2 B 9 H 11 )TiMe
- Creators
- Xiaohong Bei - University of IowaCarsten Kreuder - University of IowaDale C. Swenson - University of IowaRichard F. Jordan - University of IowaVictor G. Young - University of Minnesota
- Resource Type
- Journal article
- Publication Details
- Organometallics, Vol.17(6), pp.1085-1091
- DOI
- 10.1021/om970962n
- ISSN
- 0276-7333
- eISSN
- 1520-6041
- Language
- English
- Date published
- 03/16/1998
- Academic Unit
- Chemistry
- Record Identifier
- 9984622048402771
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