Intramolecular, Metallacyclic Organoaluminium, ‐gallium and ‐indium Addition Compounds Crystal Structure of 1‐Galla‐5‐azabicyclo[3.3.3]undecane

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.