Abstract
Intramolecularly base‐stabilized four‐coordinated metallacyclic organoaluminium, ‐gallium, and ‐indium compounds C~5~H~10~‐Al(CH~2~)~3~NMe~2~ (4), C~4~H~8~Ga(CH~2~)~3~NMe~2~ (5), C~5~H~10~Ga(CH~2~)~3~N‐Me~2~ (6), C~5~H~10~GaCH~2~CH(Me)CH~2~NMe~2~ (7), C~4~H~8~Ga(CH~2~)~4~NMe~2~ (8), C~5~H~10~Ga(CH~2~)~4~NMe~2~ (9), EtAl[(CH~2~)~3~]~2~NMe (10), MeGa‐[(CH~2~)~3~]~2~NMe (11), EtGa[(CH~2~)~3~]~2~NMe (12), MeIn[(CH~2~)~3~]~2~NMe (13), and (14) have been synthesized by the reaction of [3‐(dimethylamino)propyl]aluminium dichloride (1), [3‐(dimethylamino)propyl]gallium dichloride (2), [3‐(dimethylamino)‐2‐methylpropyl]gallium dichloride (3), or [4‐(dimethylamino)butyl)gallium dichloride with the respective bis‐Grignard reagents or by the reaction of the organometal dichlorides RMCl~2~ with bis[3‐(chloromagnesio)propyl]methylamine or with N,N′‐bis[3‐(chloromagnesio)propyl]‐N,N′‐dimethyl ethylenediamine. Aluminium or gallium trichloride reacts with tris[3‐(chloromagnesio)propyl]amine to give Al[(CH~2~)~3~]~3~N (15) and Ga[(CH~2~)~3~]~3~N (16). The ^1^H‐, ^13^C‐NMR and mass spectra of the new compounds as well as the X‐ray crystal structure of 16 are discussed. 4, 6, and 12 have been tested successfully as MOVPE precursors.