Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
New carbaalanes - (AlMe)(8)(CCH2Me)(5)(C=C-Me) and the THF adduct (AlMe)(8)(CCH2Me)(5)H center dot 2THF
Autore:
Uhl, W; Breher, F; Mbonimana, A; Gauss, J; Haase, D; Lutzen, A; Saak, W;
Indirizzi:
Univ Marburg, Fachbereich Chem, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 eich Chem, D-35032 Marburg, Germany Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany Univ Mainz Mainz Germany D-55099 Inst Phys Chem, D-55099 Mainz, Germany Univ Oldenburg, Fachbereich Chem, D-26111 Oldenburg, Germany Univ Oldenburg Oldenburg Germany D-26111 hem, D-26111 Oldenburg, Germany
Titolo Testata:
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
fascicolo: 12, , anno: 2001,
pagine: 3059 - 3066
SICI:
1434-1948(200112):12<3059:NC-(AT>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
NMR CHEMICAL-SHIFTS; MOLECULAR-STRUCTURE; WORKSTATION COMPUTERS; PERTURBATION-THEORY; BASIS-SETS; ALUMINUM; ATOMS; CLUSTERS; IMPLEMENTATION; SPECTROSCOPY;
Keywords:
aluminium; carbaalanes; clusters; quantum-chemical calculations; NMR spectroscopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Uhl, W Univ Marburg, Fachbereich Chem, Hans Meerwein Str, D-35032 Marburg,Germany Univ Marburg Hans Meerwein Str Marburg Germany D-35032 rg, Germany
Citazione:
W. Uhl et al., "New carbaalanes - (AlMe)(8)(CCH2Me)(5)(C=C-Me) and the THF adduct (AlMe)(8)(CCH2Me)(5)H center dot 2THF", EUR J INORG, (12), 2001, pp. 3059-3066

Abstract

The hydroalumination of Me2Al-C dropC-Me with a large excess of Me2AlH afforded the arachno-carbaalane (Al-Me)(8)(CCH2Me)(5)H (4) by the release of AlMe3. 4 is almost insoluble in noncoordinating solvents and could not be purified by recrystallization. On an attempt to recrystallize 4 from a THF solution, the adduct (AlMe)(8)(CCH2Me)(5)H . 2THF (5) was isolated as the first stable ether adduct of a carbaalane. Crystal structure determination revealed a cube of eight aluminium atoms, five faces of which are bridged by C-CH2Me groups. The sixth face is mu (2)-bridged by a hydrogen atom, and twoopposite aluminium atoms of this face are coordinated by one THF ligand each. When the excess of dimethylaluminium hydride was reduced and the starting compounds were employed in a 1:2.1 molar ratio, an incomplete hydroalumination reaction led to the formation of the carbaalane (AlMe)(8)(CCH2Me)(5)(mu -C dropC-Me) (6), in which the bridging hydrogen atom of 4 is replaced by an alkynido group. Al-27 NMR spectroscopic data of all the characterizedcarbaalanes are reported and supplemented by Al-27 NMR chemical shift calculations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 20:10:48