ISSN:
0044-2313
Keywords:
Methylene bridged dialuminium compounds
;
reaction with LiCH(PMe2)2
;
Al2C2P heterocycle
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
The Reaction of [(Me3Si)2CH]2Al—CH2—Al [CH(SiMe3)2]2 with LiCH(PMe2)2; Formation of a Five-membered Al2C2P HeterocycleThe recently synthesized methylene bridged dialuminium compound [(Me3Si)2CH]2Al—CH2—Al [CH(SiMe3)2]2 3 reacts with one equivalent of LiCH(PMe2)2 in the presence of TMEDA to give an adduct with one aluminium atom coordinated by the carbanionic carbon atom and the second one coordinated by one phosphorus atom. A five-membered heterocycle 5 is formed, which was characterized by a crystal structure determination showing a strongly bent ring with the phosphorus atom located above the plane of the four remaining atoms (Al2C2). 5 is unstable in ethereal solution decomposing under ether cleavage to the educt 3 and the diphosphinomethane derivative CH2(PMe2)2.
Notes:
Die methylenverbrückte Dialuminiumverbindung [(Me3Si)2CH]2Al—CH2—Al [CH(SiMe3)2]2 3 reagiert mit einem Äquivalent LiCH(PMe2)2 in Gegenwart von TMEDA unter Anlagerung des carbanionischen Kohlenstoffatoms und eines der beiden Phosphoratome an seine beiden ungesättigten Metallatome. Dadurch entsteht ein fünfgliedriger Al2C2P-Heterozyklus 5, der im Festkörper eine sehr starke Winkelung aufweist. 5 ist in etherischer Lösung nicht beständig und ergibt unter Etherspaltung neben dem Edukt 3 das Diphosphanomethan CH2(PMe2)2.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19946200818
