Synthesis, characterization and crystal structure of a 2-(diethylaminomethyl)indole ligated dimethylaluminium complex

Abstract

The title compound, [Al(CH3)2(C13H17N2)] (systematic name; {2-[(diethylamino)methyl]indol-1-yl-κ2N,N′}dimethylaluminium), was prepared by methane elimination from the reaction of 2-(diethylaminomethyl)indole and trimethylaluminium. The complex crystallizes readily from a concentrated toluene solution in high yield. The asymmetric unit contains two crystallographically independent molecules. Each molecule has a four-coordinate aluminium atom that has pseudo-tetrahedral geometry. C—H...π interactions link the independent molecules into chains extending along the b-axis direction.

Keywords

• crystal structure
• aluminium
• indolyl
• C—H...π interactions